A chemosensor with a paddle structure based on a BODIPY chromophore for sequential recognition of Cu2+ and HSO3−. Issue 59 (28th October 2019)

• Record Type: Journal Article
• Authors: Li, Shengling; Cao, Duanlin; Hu, Zhiyong; Li, Zhichun; Meng, Xianjiao; Han, Xinghua; Ma, Wenbing
• Is Part Of: RSC advances. Volume 9:Issue 59(2019)
• Page Start: 34652
• Page End: 34657
• Publication Date: 2019-10-28
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra08345f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A highly selective chemosensor based on a BODIPY chromophore for sequential recognition of Cu 2+ and HSO3 − . Abstract : In this study, a highly selective chemosensor ML based on a BODIPY fluorescent chromophore was synthesized for sequential recognition of Cu 2+ and HSO3 − in a CH3 OH/H2 O (99 : 1 v/v) system, which contained three recognition sites and its structure characterized by 1 H NMR, 13 C NMR and ESI-HR-MS. The sensor ML showed an obvious "on–off" fluorescence quenching response toward Cu 2+ and the ML -Cu 2+ complex showed an "off–on" fluorescence enhancement response toward HSO3 − . The detection limit of the sensor ML was 0.36 μM to Cu 2+ and 1.4 μM to HSO3 − . In addition, the sensor ML showed a 1 : 3 binding stoichiometry to Cu 2+ and the recovery rate of ML -Cu 2+ complex identifying HSO3 − could be over 70%. Sensor ML showed remarkable detection ability in a pH range of 4–8.