Reversible Fluorescence Switching of Donor–Acceptor Type Bipyridines by Simple Protonation–Deprotonation Equilibria

Autor:	Shaik Mubeena, Gayatri Annapareddy, Monima Sarma, Ken-Tsung Wong, Yi-Sheng Chen, Meghana N
Rok vydání:	2021
Předmět:	chemistry.chemical_compound Bipyridine Deprotonation Chemistry Pyridine Molecule Protonation General Chemistry Chromophore Photochemistry Fluorescence Acceptor
Zdroj:	Australian Journal of Chemistry. 74:601-606
ISSN:	1445-0038 0004-9425
Popis:	This article describes the switchable fluorescence of a series of donor–acceptor type 2,2′-bipyridines. The original bipyridine molecules have four protonation sites – two on the amino donor sites and two on the pyridine acceptor cores. These nitrogen-containing sites are selectively protonated by suitable acids and the protonation influences the electronic conjugation and structure of the chromophores. Consequently, the emission characteristics of the molecules are affected, and this behaviour is reversible, i.e. the neutral original species are regenerated by the addition of an equivalent amount of base. The switchable behaviour of these compounds is accompanied by a visible colour change of the relevant solutions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ba6315bceb18af90330140e038024314 https://doi.org/10.1071/ch21054 Zobrazit plný text záznamu Plný text ve formátu PDF