The Fluorescence Behavior Studies and Applications of Two D‐π‐A Type Imidazolium Analogs

Abstract

The fluorescence behaviors and applications of two water-soluble imidazolium analogs TPI-1 and TPI-2 with D-π-A structures have been studied. Compound TPI-1 possessed the aggregation-induced emission (AIE) effect, but TPI-2 not. Moreover, compound TPI-1 could serve as a fluorescence turn-on probe for detecting uridine-5'-triphosphate (UTP) in living cells by AIE mechanism, while TPI-2 was able to penetrate into the cell membranes and light up the living cells.

Supramolecular assemblies of Zn(ii) complexes with a D–π–A ligand for sensing specific organic molecules

“…Among the recent reported luminescent materials, molecules with the D-π-A structure have attracted great attention, attributed to their intramolecular charge-transfer (ICT) property, and have been proved to be valuable for a wide range of applications, such as OLEDs, sensing, anti-counterfeiting and displays. [18][19][20][21][22] A series of novel MOFs utilizing D-π-A ligands with tetrazole and terpyridine groups have been reported to realize the modulation of long persistent luminescence (LPL) by adjustment of their dynamic noncovalent coordination structures. 21 It is known that azole is a kind of electron-rich group that is suitable to serve as an intramolecular electrondonor, while pyridine is better at acting as an electron acceptor ascribed to its relative electron-deficient conjugation property.…”