White light emission in water through admixtures of donor–π–acceptor siblings: experiment and simulation. (9th July 2019)

• Record Type: Journal Article
• Authors: Kumari, Beena; Singh, Amit; Jana, Palash; Radhakrishna, Mithun; Kanvah, Sriram
• Is Part Of: New journal of chemistry. Volume 43:Number 29(2019)
• Page Start: 11701
• Page End: 11709
• Publication Date: 2019-07-09
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c9nj02389e
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : White light emission through binary admixtures of push–pull stilbenes. Abstract : Donor–acceptor π-conjugated molecules with triphenylamine donor and different acceptor (H, cyano, and pyridinium) units with a double bond spacer were synthesized. These compounds exhibit bathochromic shifts in absorption and emission with an increase in the acceptor strength. Solvatochromic measurements in water reveal emitting states characterized by a polar nature with three distinct emission spectral regions from blue to red. Interestingly, binary mixtures of the stilbenes in acetonitrile and water gave white light emission. MD simulations of the admixtures reveal that the emission data directly correlate to the structural arrangements of the molecules driven by intermolecular and solvent interactions with micelle-like structural arrangements for one set and uniform homogenous mixing for the other two sets. Such a tunable emission strategy using simple structural siblings could offer great potential towards designing novel emitting systems.