Fluorescent Chemosensor for Zinc Ion Detection with Significant Emission Color Change in Aqueous Solution Based on AIEgen. Issue 10 (11th April 2017)

• Record Type: Journal Article
• Authors: Feng, Qi; Li, Yuanyuan; Li, Kai; Lu, Jinying; Wang, Jinmin; Fan, Pengyu; Li, Dakuan; Wu, Dongming; Hou, Hongwei
• Is Part Of: ChemistrySelect. Volume 2:Issue 10(2017)
• Page Start: 3158
• Page End: 3162
• Publication Date: 2017-04-11
• Subjects: AIE -- Emission color change -- ESIPT -- Fluorescent chemosensor -- Zinc; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201700508
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Furan‐2‐carbohydrazide‐5‐(2‐thienyl)‐salicylaldehyde Schiff base (1 ) was designed and synthesized for the detection of Zn(II) in aqueous solution at neutral pH. Based on its essential excited state intramolecular proton transfer (ESIPT) process, 1 exhibited aggregation‐induced emission (AIE) characteristic with a fluorescence emission at 567 nm. Ratiometric fluorescence changes could be observed in H2 O/EtOH solutions with different water fraction. After binding to Zn(II) with a molar ratio of 1:1, 1 showed a new fluorescence emission peak at 493 nm and exhibited a 70‐fold fluorescence enhancement. Meanwhile, a significant emission color change from orange‐red to yellow was observed, enabling detecting Zn(II) by naked eye under illumination with a UV lamp. In addition, chemosensor1 could distinguish Zn(II) from most of the common metal ions effectively. A linear range of 0.10‐10.00 μmol L −1 and a detection limit of 77 nmol L −1 Zn(II) were achieved. Abstract : An AIE fluorescent chemosensor of furan‐2‐carbohydrazide‐5‐(2‐thienyl)‐salicylaldehyde Schiff base (1 ) for Zn(II) detection in aqueous solution at neutral pH was reported. After binding to Zn(II), a significant emission color change from orange‐red to yellow was observed.Introduction