TIFR
Department of Chemical Sciences
School of Natural Sciences

June 7, 2021 at 4.00 pm (Via Zoom)

Title :

Optical Properties and Applications of Novel Stimuli-Responsive Organic Smart Materials

Abstract :

Prediction of multi-stimuli responsive behaviour in newly developed luminogen is an appealing yet challenging puzzle, since no concrete design strategy has been developed so far. In this talk, I will discuss about our unique strategy to establish structure-property relationship for designing of multi-stimuli responsive mechanoluminiscent material. First time we have reported that synergistic effect between twisting, conformational flexibility of donor moieties along with numerous non-covalent interactions endow the multi-stimuli responsive behaviours1.

In the second part of my talk, I will be talking about a unique strategy to sensitize centrosymmetrically packed organic luminogens,2 which generally do not respond to external stimuli owing to their zero gross dipole moment and degenerate electronic energy states in solid-state packing.

In the last part of my talk, I will be talking about the next generation fluorophores exhibiting “all in one” type applications potentiality. Our work provides the important concept of “all in one” type luminogens possessing the following features comprising optical, biological and materials applications: 1) single source white light emission, 3) stimuli-responsive mechanoluminiscent feature, 2) selective mitochondria tracking.3

1. Bibhisan Roy, M. Chenna Reddy, Partha Hazra. Chemical Science, 2018, 9, 3592-3606.

2. Bibhisan Roy, M. Chenna Reddy, Soumendra Nath Panja, Partha Hazra. J. Phys. Chem. C, 2019, 123, 3848-3854.

 

3. Bibhisan Roy, M. Chenna Reddy, Gregor P. Jose, Felix C. Niemeyer, Jens Voskuhl, and Partha Hazra. J. Phys. Chem. Lett. 2021, 12, 1162-1168.