WELCOME TO THE HOME PAGE OF

PROFESSOR N. PERIASAMY

 

                                               

 

(Updated on 20-Jan-06)

 

- Research Areas, Recent Publications, Publication List, Education, Awards, Fellowships, Address/email

 

Title, Affiliation, Address, Phone & email

Nallagounder Periasamy, Ph.D.

Professor

Department of Chemical Sciences

Tata Institute of Fundamental Research

Homi Bhabha Road, Colaba

Mumbai (Bombay) – 400 005

INDIA

 

Tel: (+91 22) 2278 2383 (dir); 2280 4545 ext. 2383 (Office)

Fax: (+91 22) 2280 4610/4611

Email: peri@tifr.res.in

 

 

Education

 

Ph.D. (Physical Chemistry) Bombay University, Mumbai (1976)

M.Sc. (Chemistry) Indian Institute of Technology Madras, Chennai (1969)

B.Sc. (Chemistry) Alagappa College (Madras Univ.), Karaikudi (1967)

 

Positions held in TIFR:

Research Associate, Fellow, Reader, Associate Professor, Professor(G), Professor(H): 1970-

 

Visiting Positions held elsewhere:

            1977/78                                   Post-doctoral Fellow, Brandeis Univ., Boston, USA    

1980/82                                   Max Planck Stipend fellow, Max Planck Institute for Biophysical Chemistry, Gottingen, Germany

1990                                        Visiting Professor, Institute for Molecular Spectroscopy, Bologna, Italy

1991/92                                   Visiting Research Biophysicist, Univ. California, San Francisco (UCSF), USA

            1997                                        Visiting Professor, UCSF, USA

 

Awards, Fellowships, etc:

            Elected Fellow (2004), Indian National Science Academy, New Delhi

Elected Fellow (2002), National Academy of Sciences India, Allahabad

Professor K. Venkataraman Lectureship Award (1998), UDCT, Mumbai.

            Elected Fellow (1994), Indian Academy of Sciences, Bangalore.

Homi Bhabha Prize (Chemistry:1970), BARC Training School, Mumbai.

Merit Prize (M. Sc. - 1969), I. I. T., Madras

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Research Areas

 

Fluorescence Spectroscopy & Applications:

 

                        Molecular fluorescence of organic molecules is widely used for a variety of applications especially in biology and materials science. How well do we know the photophysics of some of these molecules, especially in complex media? Surprisingly, there is still room for discovering something new in Molecular Fluorescence that has not yet become ‘text-book’ standard! Please read our papers marked below (# publication number in the list). Your comments, if any, are most welcome…

 

1)      Determination of the number of emissive species in a sample by TRANES (Publications #83, 84, 85, 88):

 

TRANES is a surprisingly simple one step extension to TRES. TRANES spectra are transparent to interpret! For example, identical spectra means one emissive species, an isoemissive point means two emissive species, two isoemissive points (at different times) means three emissive species, and so on. The real fun is finding out an explanation (i.e. origin) of the number of species thus determined. Is there ‘true’ solvation dynamics in your sample? Make sure that you do not have an isoemissve point in TRANES spectra!

 

2)      Site of solubilization in membranes (#74):

 

Ever wondered where the fluorescent molecule is sitting in the bilayer membrane? If you do, this paper is worth reading.

 

3) Solvation dynamics by exchange of solvent molecules (#79):

 

Solvation dynamics means solvent (or solute) reorientation in the excited state of a fluorescent molecule. This paper is an example of solvation dynamics of a different kind!

 

3)      Molecular dynamics in micelle (#78, 86):

 

An example of analysis of experimental fluorescence polarization data in, perhaps, the most exact way.

 

5)         Data Analysis 

 

In-house programs for the analysis of time-dependent data (e.g. Fluorescence decay, FCS, DLS, FRAP, etc) for model-based equations and model-independent Maximum Entropy Method (MEM) are available free upon request.

           

Materials Chemistry:

 

                        Preparation and characterization of luminescent, optical and electronic materials have tremendous potential to new discoveries.

 

             1) J-aggregates & related materials (#89,64,70,73): Ionic porphyrins form J- and other type aggregates with a variety of organic and inorganic ions.  

 

            2) Photophysics of Aluminium tris(hydroxyquinolate (Alq3) (#87, 90, 96): We have identified two minor peaks to a new electronic transition! A wealth of data on the fluorescence properties of Alq3.

 

            3) Electroluminescence and OLED molecules (#101, 103):

 

            4) Photoconductivity (#108)

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Recent Publications

109.     Photoconduction in Alq3

 D. Ray, M.P. Patankar, N. Periasamy, and K.L. Narasimhan

J. Appl. Phys. 98 (2005) 123704

 

108.     Optical excitations of porphyrin J-aggregates

A. Tonizzo, M. Cerminara, G. Macchi, F. Meinardi, N. Periasamy, P. Sozzani and and R. Tubino

Synthetic Metals 155 (2005) 291-294.

 

107.     Measurement of built-in voltage in organic semiconductor devices

D. Ray, M.P. Patankar, N. Periasamy, and K.L. Narasimhan

Synthetic Metals 155 (2005) 349-351.

 

106.     Emission properties of Mn doped ZnS nanocrystals

            Sameer Sapra, Ankhita Parakash, A. S. Ghangrekar, N. Periasamy and D. D. Sarma

            J. Phys. Chem. 109 (2005) 1663-68.

 

105.     Synthesis and Characterization of soluble aluminum complex dyes based on 5-substituted 8-hydroxyquinoline derivatives for OLED applications

A. Mishra, N. Periasamy, M. Patankar and K.L. Narasimhan

Dyes and Pigments, 66 (2005) 89-97.

 

104.     Transient Electroluminesence in Organic Alloy Light Emitting Diodes

V. V. N. Ravi Kishore, Meghan P. Patankar, N. Periasamy and K. L. Narasimhan

Synthetic Metals 146 (2004) 347-350.

 

103.     Synthesis of 5-alkoxymethyl- and 5-aminomethyl-substituted 8-hydroxyquinoline derivatives and their luminescent Al(III) complexes for OLED applications

            A. Mishra, Pabitra K. Nayak and N. Periasamy

            Tetrahedron Letters, 45 (2004) 6265-6268.

 

102.     Time resolved Photoluminescence spectra of PPV film: Heterogeneity and excited state relaxation

V. V. N. Ravi Kishore, Sonali Kokane, K. L. Narasimhan, N. Periasamy

            Chem. Phys. Lett. 386 (2004) 118-122.

 

101.     Transient Electroluminesence in Alloy based Organic Light Emitting Diodes

V. V. N. Ravi Kishore, Meghan P. Patankar, N. Periasamy and K. L. Narasimhan

Synthetic Metals 143 (2004) 295-303.

 

100.     Fluorescence Spectroscopy: New Developments

            N. Periasamy

            National Acad. Sci. Lett. 26 (2003) 251-258.

 

99.       Control of Coherent length and Aggregate size in J-aggregate of Porphyrin

A.S.R. Koti, J. Taneja and N. Periasamy,

Chem. Phys. Lett. 375 (2003) 171 – 176.

 

98.       Self-Assembly of Template-Directed J-aggregates of Porphyrin

A. S. R. Koti and N. Periasamy

Chemistry of Materials 15 (2003) 369-371.

 

97.       Time Resolved Fluorescence Spectroscoy: TRES and TRANES

N. Periasamy and A. S. R. Koti

Proc. INSA, 69A (2003) 41-48.

 

96.       On the Radiative Lifetime, Quantum Yield and Fluorescence Decay of Alq in Thin Films

            V. V. N. Ravi Kishore, N. Periasamy, and K. L. Narasimhan

            Phys. Chem. Chem. Phys. (2003) 1386 – 1391.

 

95.       On the stability and optical spectra of Alq negative ion in solution and thin films.

            V. V. N. Ravi Kishore, N. Periasamy, B. Bhattacharjee, Ranjan Das, P. L. Paulose,

            and K. L. Narasimhan

            Chem. Phys. Lett. 357 (2003) 657-661.

 

94.       TRANES Spectra of  Fluorescence Probes in Lipid Bilayer Membranes: An Assessment of Population Heterogeneity and Dynamics

Ira, A. S. R. Koti, G. Krishnamoorthy and N. Periasamy

J. Fluorescence 13 (2003) 95-103.

 

93.        Modified CVD Deposition of Poly (p-Phenylene-Vinylene)

Sonali Kokane, M. P. Patankar, K. L. Narasimhan and N. Periasamy

Synthetic Metals 132(2003) 235-238.

 

92.       Measuring size distribution in highly heterogeneous systems with fluorescence correlation spectroscopy

            P. Senguptha, J. Balaji, K. Gorai, N. Periasamy and S. Maiti

            Biophys. J.  84 (2003) 1977-1984.

 

91.       Time Resolved Area Normalized Emission Spectroscopy (TRANES) of DMABN Confirms Emission from Two States

A. S. R. Koti and N. Periasamy

Research in Chemical Intermediates. 28 (2002) 831.

 

90.       Anomalous Fluorescence in Supercooled Organic Liquids: Correlation with Glass/Phase Transition

            V. V. N. Ravi Kishore and N. Periasamy

            Current Science. 82 (2002) 1449-1452

 

89.       Cyanine induced Aggregation in meso-tetrakis (4-sulphonatophenyl) Porphyrin Anions

A. S. R. Koti and N. Periasamy

J. Materials Chem. 12 (2002) 2312-2317.

 

88.       On the Assignment of the Absorption Bands in the Optical Spectrum of Alq3

V. V. N. Ravi Kishore, A. Aziz, K. L. Narasimhan, N. Periasamy, P. S. Meenakshi, and

S. Wategaonkar

Synthetic Metals 126 (2002) 199-205.

 

 

LIST OF ALL PUBLICATIONS (1973-2006)

(Prof. N. Periasamy)

 

1.                  Magnetic Field Enhancement of Electrochemiluminescence Intensity.

N.Periasamy, S.J. Shah and K.S.V. Santhanam

            J. Chem.  Phys.  58, 821 (1973)

 

2.                  Studies on Efficiencies of Electrochemiluminescence of              rubrene.

            N. Periasamy and K.S.V. Santhanam

            Proc.  Ind.  Acad.  Sci.  80A, 194 (1974)

 

3.                  Electrochemiluminescence of Phenanthrene‑d: A possible case of efficient  triplet‑triplet annihilation.

            N. Periasamy and K.S.V. Santhanam

           Can. J. Chem. 53, 76 (1975)

 

4.                  The Deuterium Effect on Electrochemiluminescence Efficiencies of Anthracene and Phenanthrene.

            N. Periasamy and K.S.V. Santhanam

            Pramana, 5, 339 (1975)

 

5.                  Emission from Excited Triplet State during ECL.

            N. Periasamy and K.S.V. Santhanam

            Chem.  Phys.  Lett.  39,  265 (1976)

 

6.                  Singlet Fission in Electrochemiluminescence of Tetracene.

            N. Periasamy and K.S.V. Santhanam

           Chem.  Phys.  Lett.  51,  442 (1977)

 

7.                  Triboluminescence, a new tool to investigate fracture initiation time of crystals under stress.

            B.P. Chandra, N. Periasamy and J.N. Das

            Pramana, 8, 395 (1977)

 

8.                  Photoprocesses in covalently linked pyrochlorophyllide‑a dimer: Triplet state formation and opening  and  closing  of hydroxylic linkage.

            N. Periasamy, H. Linschitz, G.L.  Closs  and  S.G.  Boxer

            Proc. Natl. Acad. Sci. U.S.A. 75, 2563 (1978)

 

9.                  Photodisaggregation of chlorophll‑a and ‑b dimers.

            N. Periasamy and H. Linschitz

            J.  Am.  Chem.  Soc.  101,  1056 (1979)

 

10.              Cage escape and spin rephasing of triplet ion‑radical pairs: Temperature‑viscosity   and    magnetic    field effects in photoreduction of fluorenone by DABCO.

            N. Periasamy and H. Linschitz

            Chem. Phys. Lett. 64, 281 (1979)

 

11.              Photoreduction of Anthraquinone in aqueous micellar solution.

            V. Swayambunathan and N. Periasamy

            J. Photochem. 13, 325 (1980)

 

12.              A reversible redox  couple in quinone‑hydroquinone system in nonaqueous medium.

            V.J. Koshy, V. Swayambunathan and N. Periasamy

            J.  Electrochem. Soc. 127, 2761 (1980)

 

13.              Laser Amplification in  an  optical  fibre  by  evanescent field coupling.

             N. Periasamy and F.P. Schafer

            Appl. Phys. 24, 201 (1981)

 

14.              Distributed  feedback  laser  action  in  an  optical fibre by evanescent field coupling.

            N. Periasamy and Zs. Bor

            Optics Commun. 39, 398 (1981)

 

15.              Electroluminescence of liquid dye solutions in a waveguide cell.

            N. Periasamy and F.P. Schafer

            App. Phys. B, 28, 21 (1982)

 

16.              Evanescent wave coupled dye laser emission in optical fibres.

            N. Periasamy

            Appl. Opt. 21, 2693 (1982)

 

17.              High Resolution CARS spectroscopy of the  CH‑stretching mode  of liquid benzene.

            H. Gruhl and N. Periasamy

            Chem. Phys. Lett. 95, 352 (1983)

 

18.              The 3T (p,p*) state of Acridine.

            N. Periasamy

            Chem. Phys. Lett. 99, 322 (1983)

 

19.              Two‑photon excitation spectrum of benzonitrile vapour.

            N. Periasamy and S. Doraiswamy

            Pramana, 21, 79 (1983)

 

20.              Nanosecond laser flash photolysis of acridine in organic solvents.

             N. Periasamy

            Proc. Indian Acad. Sci. (Chem. Sci.) 93, 1361 (1984)

 

21.              The Two‑photon fluorescence excitation spectrum of benzotrifluoride vapour.

            S. Doraiswamy and N. Periasamy

            J. Chem. Phys. 81, 4844 (1984)

 

22.              Time Domain Spectroscopy.

            Ranjan Das, S. Doraiswamy, N. Periasamy and B.Venkataraman

            J. Sci. Res. (B.H.U.) 35, 1 (1985)

 

23.              On the origin of heterogeneity of fluorescence decay kinetics of reduced nicotinamide adenine dinucleotide.

            G. Krishnamoorthy, N. Periasamy  and  B.  Venkataraman

            Biochem. Biophys. Res. Commun. 144, 387 (1987)

 

24.              Diffusion‑controlled reactions : Fluorescence quenching of cationic dyes by charged quenchers.

            N. Periasamy, S. Doraiswamy, G.B. Maiya and B.Venkataraman

            J. Chem. Phys. 88, 1638 (1988)

 

25.              Diffusion‑controlled reactions : Experimental verification of the time‑dependent rate equation.

            N. Periasamy, S. Doraiswamy, B. Venkataraman and G.R.Fleming

            J. Chem. Phys. 89, 4799 (1988)

 

26.              On the analysis of the fluorescence decay by the nonlinear least squares method.

            N. Periasamy

            Biophysical J. 54, 961 (1988)

 

27.              Electron  transfer  rates  in  covalently  linked donor‑acceptor systems.

            S.Doraiswamy, G.B.Maiya, N.Periasamy  and B.Venkataraman

            Ultrafast Phenomena VI, eds. T. Yajima et  al,  Springer (1988) p 568.

 

28.              Picosecond spectroscopy studies in TIFR.

            S.Doraiswamy,  G.Krishnamoorthy, N.Periasamy and B.Venkataraman

            Proc. Indian Natn. Sci. Acad. 54A, 782 (1988)

 

29.              Diffusion influenced reactions at short times : Breakdown of the Debye‑ Smoluchowski description.

            D.D. Eads, N. Periasamy and G.R. Fleming

            J.  Chem.  Phys.  90, 3876 (1989)

 

30.              Techniques  for  the  study  of  fast  chemical  processes with half‑times of the order of microseconds or less.

            K.V.Bankar, V.R.Bhagat, R.Das, S.Doraiswamy, A.S.Ghangrekar, D.S.Kamat,

N.Periasamy, V.J.P.Srivatsavoy and B.Venkataraman

            Indian J. Pure and App. Phys. 27, 1416 (1989)

 

31.              Diffusion controlled reactions :  Analysis of  quenched  fluorescence decay data.

            Ranjan Das and N. Periasamy

            Chemical Physics, 136, 361 (1989)

 

32.              `Long‑time' approximation for the intensity decay quation in diffusion‑limited fluorescence quenching reactions.

            N. Periasamy, G.C. Joshi and Ranjan Das

            Chem. Phys. Lett.  160, 457 (1989)

 

33.              Diffusion‑controlled reactions :  Transient  effects   in the fluorescence quenching of indole and NATA in water.

            G.C. Joshi, R. Bhatnagar, S. Doraiswamy and N. Periasamy

            J. Phys Chem. 94, 2908 - 2914 (1990)

 

34.              Rotational reorientation dynamics of polar dye molecules by picosecond laser spectroscopic technique.

            G.B.Dutt, S.Doraiswamy, N.Periasamy and  B.Venkataraman

            J. Chem. Phys. 93, 8498 - 8513(1990)

 

35.              Fluorescence decay of Indole in water.

            N. Periasamy and G.C. Joshi

            Il Nuovo Cimento, D12, 1691-1695 (1990)

 

36.              Molecular reorientation dynamics of polar dye probes in tertiary‑butyl alcohol‑water mixtures.

            G.B. Dutt, S. Doraiswamy and N. Periasamy

            J.  Chem.  Phys.  94, 5360‑68 (1991)

 

37.              Studies of the triplet state properties of 1,5‑diaminoanthraquinone using laser flash photolysis.

            V.J.P. Srivatsavoy and N. Periasamy

            J.  Photochem.  Photobiology A:Chem 58, 215‑223 (1991)

 

38.              Electron transfer distance in intermolecular diffusion‑limited reactions.

            G.B.Dutt and N.Periasamy

            J. Chem. Soc. Faraday Trans. 87, 3815‑20 (1991)

 

39.              Temperature dependence of the electron drift mobility in doped and undoped amorphous silicon.

            D.K. Sharma, K.L. Narasimhan, N. Periasamy and D.R. Bapat

            Phys. Rev. B, 44, 12806‑808, (1991)

 

40.              Location of the low‑energy 1Ag state in a polythiophene oligomer by Two‑photon spectroscopy : a‑sexithienyl.

            N. Periasamy, R. Danieli, G. Ruani, R. Zamboni  and C. Taliani

            Phys. Rev. Lett. 68, 919‑922 (1992)

 

41.              Picosecond rotation of small polar fluorophores in the  cytosol of sea urchin eggs.

            N. Periasamy, M.  Armijo  and  A.S.  Verkman

            Biochemistry,  30, 11836‑841 (1991)

 

42.              Subtraction of background fluorescence in multi‑harmonic frequency domain fluorometry.

            N. Periasamy and A.S. Verkman

            Anal. Biochem. 201, 107‑113 (1992)

 

43.              The non‑radiative processes from the S1‑state of aminoanthraquinones : a steady state and time‑resolved study.

            V.J.P.Srivatsavoy, B.Venkataraman and N.Periasamy

             J.Photochem Photobiology A:Chem. 68, 169‑185 (1992)

 

44.              Organic osmolytes increase cytoplasmic viscosity in kidney cells.

            N. Periasamy, H.P. Kao, K.  Fushimi  and  A.S.  Verkman

            Am.  J. Physiol. 263, C901‑907, (1992)

 

45.              Intermolecular Electron transfer rate in Diffusion limited reactions: Picosecond fluorescence studies.

            B. Venkataraman N. Periasamy,  S.  Modi,  G.  Bhaskar Dutt and S. Doraiswamy

            Spectrochimica Acta 48A, 1707‑13 (1992)

 

46.              Singlet molecular oxygen quantum yield measurements of some porphyrins and metalloporphyrins.

            R.Venkatesan, N. Periasamy and T.S. Srivastava

            Proc. Ind. Acad. Sci. (Chem.Sci.) 104, 713‑722 (1992)

 

47.              The deexcitation of S1 state of aminoanthraquinones :  A steady state and time resolved study.

            V.J.P. Srivatsavoy, B. Venkataraman and N. Periasamy

            Proc. Ind. Acad. Sci. (Chem. Sci.) 104, 731‑738 (1992)

 

48.              Second messengers regulate endosomal acidification in Swiss  3T3 fitroblasts.

            Z. Ke, J. Biwersi, N. Periasamy and A. S. Verkman

            J. Cell. Biol. 119, 99‑110 (1992)

 

49.              Study of the lowest electronic states in polythiophene oligomer, a‑sexithienyl, by one and two‑photon spectroscopy.

            C. Taliani, R. Danieli, R. Lazzaroni, N. Periasamy, G. Ruani  and R. Zamboni

            Mol. Cryst. Liq. Cryst 217, 101 (1992)

 

50.              Electronic levels ordering in a‑sexithienyl.

            R. Zamboni, N. Periasamy, G. Ruani and C. Taliani

            Synthetic Metals, 54, 57-66 (1993)

 

51.              Mechanism of response of potential‑sensitive dyes studied by time‑resolved fluorescence.

            T.K. Das, N. Periasamy and G. Krishnamoorthy

            Biophys. J., 64, 1122-32, (1993).

 

52.              Linear and nonlinear spectroscopy of highly oriented thin films of a-sexithienyl: A model for ploythiophene.

            C.Taliani, R.Danieli, R.Lazzaroni, N.Periasamy, G.Ruani and     R.Zamboni

            Synthetic Metals, 55-57, 4714-4721 (1993)

 

53.              Low energy neutral and charged excitations in a-sexithienyl: A polythiophene model compound.

            N.Periasamy, C.Taliani, G.Ruani and R.Zamboni

            Synthetic Metals, 55-57, 4991-4996 (1993)

 

54.              Cytoplasmic viscosity near cell plasma membrane: Measurement by Evanescent Field Frequency Domain Microfluorimetry.

            S.Bicknese; N.Periasamy; S.B.Shohet; A.S.Verkman

            Biophys. J. 65, (1993) 1272-1282

 

55.              Segmental dynamics of the cytoplasmic domain of erythrocyte band3 determined by time-resolved fluorescence anisotropy: Sensitivity to pH and ligand binding

            J.M.Bernard; N.Periasamy; S.B.Shohet; A.S.Verkman

            Proc. Natl. Acad. Sci. (U.S.A.) 91 (1994) 1741-45.

 

56.              Time resolved Fluorescence studies on Covalently linked porphyrins-nitroarene complexes.  Conformational control of  photoinduced electron transfer reactions.

            B.G.Maiya; S.Doraiswamy; N.Periasamy; B.Venkataraman;     V.Krishnan

            J. Photochem. Photobiol. A:Chem., 81 (1994) 139-150

 

57.              Molten Globule-like Conformation of Barstar: A Study by fluorescence Dynamics.

            R.Swaminathan; J.B.Udgaonkar; N.Periasamy; G.Krishnamoorthy

            J. Phys. Chem., 98 (1994) 9270-9278.

 

58.              Similarity of Fluorescence lifetime Distributions for Single Tryptophan Proteins in the Random Coil State.

            R.Swaminathan; G.Krishnamoorthy; N.Periasamy

            Biophys. J., 67 (1994) 2013-23

 

59.              Resolution of Spectral and Lifetime heterogeneity of Tryptophan fluorescence in Bacteriorhodopsin.

            M.Roy and N.Periasamy

            Photochem. Photobiolol., 61 (1995) 292-297.

 

60.              Dynamics of Porphyrin Molecules in Micelles. Picosecond Time-resolved Fluorescence Anisotropy Studies.

            N. C. Maiti, S. Mazumdar and N. Periasamy

            J. Phys. Chem., 99 (1995) 10708-10715.

 

61.              Fluorescence Dynamics of Non-covalently linked Porphyrin dimer and Aggregates.

            N. C. Maiti; M. Ravikanth; S. Mazumdar; N. Periasamy

            J. Phys. Chem. 99 (1995) 17192-17197.

 

62.              Reversible Photobleaching of Fluorescein conjugates in air-saturated viscous solutions: Singlet and Triplet state quenching by tryptophan

            N. Periasamy, S. Bicknese and A. S. Verkman

            Photochem. Photobiol., 63 (1996) 265-271.

 

63.              Analysis of Fluorescence decay be the Maximum Entropy Method: Influence of Noise and Analysis parameters on the Width of the Distribution of lifetimes.

            R. Swaminathan and N. Periasamy

            Proc. Ind. Acad. Sci. (Chem. Sci.), 108 (1996) 39-49.

 

64.              Controlled J-aggregation of Porphyrins by Cationic Surfactants.

            N. C. Maiti, S. Mazumdar and N. Periasamy

            Current Science, 70 (1996) 997-999.

 

65.              Motional dynamics of a buried tryptophan reveals the presence of partially structured forms during denaturation of barstar.

            R. Swaminathan, U. Nath, J. B. Udgaonkar, N. Periasamy and G. Krishnamoorthy

            Biochemistry, 35 (1996) 9150-57.

 

66.              Cytoplasmic viscosity near the cell plasma membrane: Translational diffusion of a small fluorescence solute measured by total internal reflection fluorescence photobleaching recovery.

            R. Swaminathan, S. Bicknese, N. Periasamy and A. S. Verkman

            Biophysical J., 71 (1996) 1140-51.

 

67.              Mapping Fluorophore Distributions in Three Dimensions by Quantitative Multiple Angle Total Internal Reflection Fluorescence Microscopy

            B.Olveczky, N. Periasamy and A.S.Verkman

            Biophys.J., 72 (1997) 2836-47.

 

68.              Spectrally Constrained Global Analysis of Fluorescence  Decays in Biomembrane Systems.

            M. M. G. Krishna and N. Periasamy

            Analytical Biochemistry 252, (1997) 1-7.

 

69.              Fluorescence Dynamics of Dye Probes in Micelles.

            N.C.Maiti, M.M.G.Krishna, P.J.Britto and N. Periasamy

            J. Phys. Chem. 101, (1997) 11051-60.

 

70.              J- and H-aggregate of Porphyrin-Surfactant Complexes: Time-resolved Fluorescence and other Spectroscopic Studies.

            N. C. Maiti, S. Mazumdar and N. Periasamy

            J. Phys. Chem.B 102 (1998) 1528-38.

 

71.              Fluorescence and NMR studies of HSPI: Association of lifetimes with sterically constrained tryptophans.

            M.M.G.Krishna, V.Rastogi, N.Periasamy and K.V.R.Chary

            J. Phys. Chem. 102 (1998) 5520-28

 

72.              Analysis of Fluorophore diffusion by Continuous distributions of Diffusion Coefficients: Application to Photobleaching measurements of multicomponent and anomalous diffusion.

            N. Periasamy and A.S.Verkman

            Biophys. J. 75 (1998) 557-567

 

73.              J- and H-aggregate of Porphyrins with Surfactants

            N.C.Maiti, S. Mazumdar and N. Periasamy

            J. Porphyrins and Phthalocyanines 2 (1998) 369-376

 

74.              Fluorescence of Organic Dyes in Lipid Membranes: Site of solubilization and the Effects of viscosity and refractive index on lifetimes.

            M. M. G. Krishna and N. Periasamy

            J. Fluorescence 8 (1998) 81-91

           

75.              Orientational distribution of linear dye molecules in Bilayer Membranes

M.M.G.Krishna and N. Periasamy

            Chem. Phys. Lett. 298 (1998) 359-36871.      

           

76.              Electrical and Optical Properties of Monomer and J-aggregate.

            A.Aziz, K.L.Narasimhan, N.Periasamy and N.C.Maiti

            Philosophical Magazine , 79 (1999) 993-1004

 

77.              Location and Orientation of DODCI in Lipid Bilayer Membranes: Effects of Lipid Chain length and Unsaturation

            M.M.G.Krishna, and  N. Periasamy

            BBA (Biomembranes), 1461 (1999) 58-68

 

78.              Translational Diffusion of Fluorescent Probes on 3-Dimensional surfaces: Monte Carlo simulation of Anisotropy decay and Comparison with Experiments.

            M.M.G.Krishna, Ranjan Das, N. Periasamy, R. Nityananda

            J. Chem. Phys. 112 (2000) 8502-14

 

79.              Solvent Exchange in Excited state relaxation in Mixed Solvents

            A.S.R. Koti and N. Periasamy

            J. Fluorescence, 10 (2000) 177-184

 

80.              Photophysics of some Styryl Thiazolo Quinoxaline dyes in Organic media

A.S. R. Koti, B. Bhattacharjee, N. S. Haram, Ranjan Das, N. Periasamy, 

N. D. Sonawane, and D. W. Rangnekar

            J. Photochem. Photobiol. A, 137 (2000) 115.

 

81.              Time resolved Fluorescence studies of Aminostyryl pyridinium dyes in Organic solvents and Surfactant solutions

            A. Mishra, G.B. Behera, M.M.G.Krishna and  N. Periasamy

            J. Luminescence, 92 (2001) 175-188.

 

82.              Rotational Dynamics of Surface Probes in Lipid vesicles

            M.M.G.Krishna, A. Srivastava and N. Periasamy

            Biophys. Chem. 90 (2001) 123-133.

 

83.              Time resolved area normalized emission spectra (TRANES: A novel method to confirm emission from two excited states

            A. S. R. Koti, M. M. G. Krishna and N. Periasamy

            J. Phys. Chem. A  105 (2001) 1767-1771.

 

84.              TRANES Analysis of the Fluorescence of Nile Red in Organized Molecular Assemblies Confirms Emission from Two Species

            A. S. R. Koti and N. Periasamy

            Proc. Indian Acad. Sci. (Chem. Sci.) 113 (2001) 157-163.

 

85.              Application of Time Resolved Area Normalized Emission Spectroscopy (TRANES) to multi-component systems          

            A. S. R. Koti and N. Periasamy

            J. Chem. Phys. 115 (2001) 7094-99.

 

86.              Molecular Dynamics of Guest Molecules in Micelles: Models based on Fluorescence Polarization Dynamics

            N. Periasamy

            J. Fluorescence 11 (2001) 161.

 

87.              On the Assignment of the Absorption Bands in the Optical Spectrum of Alq3

V.V.N. Ravi Kishore, A. Aziz, K.L. Narasimhan, N. Periasamy, P.S. Meenakshi,

            and S. Wategaonkar

Synthetic Metals 126 (2002) 201-207.

 

88.       On the Assignment of the Absorption Bands in the Optical Spectrum of Alq3

V. V. N. Ravi Kishore, A. Aziz, K. L. Narasimhan, N. Periasamy, P. S. Meenakshi, and

S. Wategaonkar

Synthetic Metals 126 (2002) 199-205.

 

89.       Cyanine induced Aggregation in meso-tetrakis (4-sulphonatophenyl) Porphyrin Anions

A. S. R. Koti and N. Periasamy

J. Materials Chem. 12 (2002) 2312-2317.

 

90.       Anomalous Fluorescence in Supercooled Organic Liquids: Correlation with Glass/Phase Transition

            V. V. N. Ravi Kishore and N. Periasamy

            Current Science. 82 (2002) 1449-1452

 

91.       Time Resolved Area Normalized Emission Spectroscopy (TRANES) of DMABN Confirms Emission from Two States

A. S. R. Koti and N. Periasamy

Research in Chemical Intermediates. 28 (2002) 831.

 

92.       Measuring size distribution in highly heterogeneous systems with fluorescence correlation spectroscopy

            P. Senguptha, J. Balaji, K. Gorai, N. Periasamy and S. Maiti

            Biophys. J.  84 (2003) 1977-1984.

 

93.        Modified CVD Deposition of Poly (p-Phenylene-Vinylene)

Sonali Kokane, M. P. Patankar, K. L. Narasimhan and N. Periasamy

Synthetic Metals 132(2003) 235-238.

 

94.       TRANES Spectra of  Fluorescence Probes in Lipid Bilayer Membranes: An Assessment of Population Heterogeneity and Dynamics

Ira, A. S. R. Koti, G. Krishnamoorthy and N. Periasamy

J. Fluorescence 13 (2003) 95-103.

 

95.       On the stability and optical spectra of Alq negative ion in solution and thin films.

            V. V. N. Ravi Kishore, N. Periasamy, B. Bhattacharjee, Ranjan Das, P. L. Paulose,

            and K. L. Narasimhan

            Chem. Phys. Lett. 357 (2003) 657-661.

 

96.       On the Radiative Lifetime, Quantum Yield and Fluorescence Decay of Alq in Thin Films

            V. V. N. Ravi Kishore, N. Periasamy, and K. L. Narasimhan

            Phys. Chem. Chem. Phys. (2003) 1386 – 1391.

 

97.       Time Resolved Fluorescence Spectroscoy: TRES and TRANES

N. Periasamy and A. S. R. Koti

Proc. INSA, 69A (2003) 41-48.

 

98.       Self-Assembly of Template-Directed J-aggregates of Porphyrin

A. S. R. Koti and N. Periasamy

Chemistry of Materials 15 (2003) 369-371.

 

99.       Control of Coherent length and Aggregate size in J-aggregate of Porphyrin

A.S.R. Koti, J. Taneja and N. Periasamy,

Chem. Phys. Lett. 375 (2003) 171 – 176.

 

100.     Fluorescence Spectroscopy: New Developments

            N. Periasamy

            National Acad. Sci. Lett. 26 (2003) 251-258.

 

101.     Transient Electroluminesence in Alloy based Organic Light Emitting Diodes

V. V. N. Ravi Kishore, Meghan P. Patankar, N. Periasamy and K. L. Narasimhan

Synthetic Metals 143 (2004) 295-303.

 

102.     Time resolved Photoluminescence spectra of PPV film: Heterogeneity and excited state relaxation

V. V. N. Ravi Kishore, Sonali Kokane, K. L. Narasimhan, N. Periasamy

            Chem. Phys. Lett. 386 (2004) 118-122.

 

103.     Synthesis of 5-alkoxymethyl- and 5-aminomethyl-substituted 8-hydroxyquinoline derivatives and their luminescent Al(III) complexes for OLED applications

            A. Mishra, Pabitra K. Nayak and N. Periasamy

            Tetrahedron Letters, 45 (2004) 6265-6268.

 

104.     Transient Electroluminesence in Organic Alloy Light Emitting Diodes

V. V. N. Ravi Kishore, Meghan P. Patankar, N. Periasamy and K. L. Narasimhan

Synthetic Metals 146 (2004) 347-350.

 

105.     Synthesis and Characterization of soluble aluminum complex dyes based on 5-substituted 8-hydroxyquinoline derivatives for OLED applications

A. Mishra, N. Periasamy, M. Patankar and K.L. Narasimhan

Dyes and Pigments, 66 (2005) 89-97.

 

106.     Emission properties of Mn doped ZnS nanocrystals

            Sameer Sapra, Ankhita Parakash, A. S. Ghangrekar, N. Periasamy and D. D. Sarma

            J. Phys. Chem. 109 (2005) 1663-68.

 

107.     Measurement of built-in voltage in organic semiconductor devices

D. Ray, M.P. Patankar, N. Periasamy, and K.L. Narasimhan

Synthetic Metals 155 (2005) 349-351.

 

108.     Optical excitations of porphyrin J-aggregates

A. Tonizzo, M. Cerminara, G. Macchi, F. Meinardi, N. Periasamy, P. Sozzani and and R. Tubino

Synthetic Metals 155 (2005) 291-294.

 

109.     Photoconduction in Alq3

 D. Ray, M.P. Patankar, N. Periasamy, and K.L. Narasimhan

J. Appl. Phys. 98 (2005) 123704

 

 

 

 

Invited Articles for Special issues of ISRAPS Bulletin

 

Time Resolved Fluorescence Spectroscoy: TRES vs TRANES

N. Periasamy and A. S. R. Koti

ISRAPS Bulletin, Vol. 12 (No.1-4) 26-29, 2002..

 

Organic Electronics

N. Periasamy, V.V.N. Ravi Kishore and K.L. Narasimhan

ISRAPS Bulletin,  Vol. 14, (2-4) 10-14, 2004.