Azopyridinium Ionic Photoswitches: Tuning Half‐Lives of Z Isomers from Seconds to Days in Water

Author:

Kumar Gaur Ankit1ORCID,Gupta Debapriya1ORCID,Narayanan Nampoothiry Dhanyaj1ORCID,Velloth Archana1ORCID,Kaur Ramanpreet1ORCID,Kaur Navneet1ORCID,Venkataramani Sugumar1ORCID

Affiliation:

1. Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) Mohali Sector 81, SAS Nagar, Knowledge City Manauli 140306 Punjab India

Abstract

AbstractHerein, we describe water‐soluble heteroaryl azopyridinium ionic photoswitches (HAPIPs). We aim to combine variations in five‐membered heterocycles, their substitutions, N‐alkyl groups at pyridinium nitrogen, the position of pyridinium center relative to azo group, counterions, and solvents, in achieving better photoswitching. Through these studies, we successfully tuned the half‐life of Z isomers of the resultant HAPIPs between seconds to days in water. Extensive spectroscopic studies and density functional theory (DFT) computations unravelled the factors responsible for thermal relaxation behavior. Considering the versatility of these photoswitches, the tunability of half‐lives and photoswitching in aqueous medium allows the scope of applications in several fields.

Funder

Dipartimento di Scienze e Tecnologie, Università degli Studi del Sannio

Publisher

Wiley

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