A simple highly sensitive and selective turn-on fluorescent chemosensor for the recognition of Pb2+. Issue 3 (18th January 2017)

• Record Type: Journal Article
• Authors: Sun, Tao; Niu, Qingfen; Guo, Zongrang; Li, Tianduo
• Is Part Of: Tetrahedron letters. Volume 58:Issue 3(2017)
• Page Start: 252
• Page End: 256
• Publication Date: 2017-01-18
• Subjects: Fluorescence -- Chemosensor -- Schiff base -- Turn-on -- Pb2+; Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tetlet.2016.12.022
• Languages: English
• ISSNs: 0040-4039

Abstract

Graphical abstract: Highlights: A simple fluorescent turn-on chemosensorL for Pb 2+ was developed. SensorL exhibited an excellent selectivity and high sensitivity toward Pb 2+ . The quite low detection limit for Pb 2+ was found to be 3.80 × 10 −7 M. The Pb 2+ recognition can function well within a wide pH range. Abstract: A simple highly sensitive and selective turn-on fluorescent chemosensorL based on bis-Schiff-base for Pb 2+ ions was synthesized and characterized by spectroscopic techniques.L having high binding affinity towards Pb 2+ ions of 2.10 × 10 4 M −1 selectively detects Pb 2+ ions with almost no interference among various competitive ions by a 11-fold fluorescent enhancement in CH3 CN/H2 O (95:5, v/v) solution over a wide pH range. Moreover, sensorL displayed a lower detection limit of 3.80 × 10 −7 M, which is low enough for sensing sub-millimolar concentration of Pb 2+ encountered practically.