An Azacrown[N,S,O]–Styryl Modified Boron–Phenylpyrrin: Coordination‐Mode‐Transition‐Induced Colorimetric and OFF–ON–OFF Fluorescence Chemosensor for Quantifying Cu²⁺

Abstract

Abstract:A new p-azacrown [N,S,O]-styryl modified boronphenylpyrrin compound, synchronously possessing a diethylamino receptor (C-BPP-A), has been designed and synthesized. Systematic optical studies show that C-BPP-A displays a distinct two-step fluorescence response to an increasing quantity of Cu 2+

Efficient promiscuous Knoevenagel condensation catalyzed by papain confined in Cu3(PO4)2 nanoflowers

“…When solely used in the chemical catalysis reaction, Cu 2+ ion often plays an important role due to the coordination with N atom. Jiang and his coworker 36 have introduced Cu 2+ to the p -zazcrown[ N , S , O ]-styryl-modified boron-phenylpyrrin compound synchronously possessing a diethylamino receptor (C-BPP-A). Cu 2+ could coordinated with the p -zazcrown[ N , S , O ] moiety of C-BPP-A, forming the Cu 2+ -BPP-A complex and leading to the significant enhancement in fluorescence emission at 621 nm.…”