Distinct fluorescence state, mechanofluorochromism of terpyridine conjugated fluorophores and the reusable sensing of nitroaromatics in aqueous medium

Abstract

Terpyridine (TP) integrated with tetraphenylethylene (TPE-TP), pyrene (Py-TP) and triphenylamine (TPA-TP) exhibited structure controlled molecular packing and distinct fluorescence in the solid state. TPE-TP exhibited infinite aromatic π····π stacking between...

Cu2+ catalyzed benzoxazole formation from Schiff base: Reactive organic chemosensors and effect of hydroxyl position

“…Schiff bases with intramolecular H‐bonding functionality were synthesized with the intention of obtaining excited state intramolecular proton transfer (ESIPT) process mediated fluorescence molecules and investigating the influence of intramolecular H‐bonding hydrogen donor position on the fluorescence. It is noted that Schiff base molecules showed ESIPT‐mediated tunable and switchable solid‐state fluorescence 35,36 . However, TPA‐AP , HTPA‐AP , and HTPA‐A are non‐fluorescence both in solution and solid state.…”

“…It is noted that Schiff base molecules showed ESIPT-mediated tunable and switchable solid-state fluorescence. 35,36 However, TPA-AP, HTPA-AP, and HTPA-A are non-fluorescence both in solution and solid state. To confirm the intramolecular H-bonding, single crystals of all three compounds were attempted to grow by slow solvent evaporation method.…”

Anthracene–naphthylacetonitrile fluorescent isomers and Cl/H substituent dependent molecular packing, solid-state fluorescence and mechanofluorochromism

“…The use of a non-planar core for constructing a twisted fluorophore structure hindered π–π stacking and resulted in strongly enhanced solid-state fluorescence. 16–20 The weak intermolecular interactions controlled the molecular assembly and rigidified the structure in the solid state that promoted radiative transitions. 21–25 The non-planar molecular structure and weak intermolecular interactions also provided an opportunity to achieve mechanoresponsive fluorescent materials.…”