A simple pincer-type chemosensor for reversible fluorescence turn-on detection of zinc ion at physiological pH range. (30th March 2015)

• Record Type: Journal Article
• Authors: Lin, Qi; Cai, Yi; Li, Qiao; Chang, Jing; Yao, Hong; Zhang, You-Ming; Wei, Tai-Bao
• Is Part Of: New journal of chemistry. Volume 39:Number 5(2015:May)
• Page Start: 4162
• Page End: 4167
• Publication Date: 2015-03-30
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c5nj00023h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A dihydrazone based pincer-type chemosensor (Y ) which could detect zinc at physiological pH range with reversible fluorescence "Off–On–Off". Abstract : A new, highly selective and sensitive pincer-type chemosensor (Y ) for zinc ion with turn-on fluorescence behavior in physiological pH range solution was developed.Y is based on bi-hydrazone derivatives, which contain pyridine as the fluorescent group and a hydrazone bond as recognition site. The selectivity mechanism ofY for zinc is based on the combined effects of the inhibition of excited-state intramolecular proton transfer (ESIPT) and –HCN– isomerization, as well as chelation-enhanced fluorescence. The entire process takes less than 15 seconds. The minimum detection limit ofY for zinc reaches 1.39 × 10 −8 M. Moreover, Y can conveniently detect zinc in test strip form, and it can be recycled.