Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2011-04-08

Journal: ANALYTICA CHIMICA ACTA

Included Journals: PubMed、EI、SCIE

Volume: 691

Issue: 1-2

Page Number: 83-88

ISSN: 0003-2670

Key Words: Heterobimetallic ruthenium(II)-copper(II) complex; Chemosensor; Sulfide anions; Luminescence sensing

Abstract: A heterobimetallic ruthenium(II)-copper(II) complex-based luminescent chemosensor, [Ru(bpy)(2)(bpy-DPA)Cu](4+) (bpy: 2,2'-bipyridine; bpy-DAP: 4-methyl-4'-[N,N-bis(2-picolyl)amino-methylenel-2,2'-bipydine), has been designed and synthesized for the highly selective and sensitive recognition and detection of sulfide anions in 100% aqueous solutions. Owing to the high affinity of sulfide to Cu(II), the non-luminescent chemosensor can specifically and rapidly react with sulfide to yield the corresponding ruthenium(II) complex, [Ru(bpy)(2)(bpy-DPA)](2+), accompanied by the remarkable luminescence enhancement. The dose-dependent luminescence enhancement of the sensor shows a good linearity with a detection limit of 20.7 nM for sulfide anions. The novel luminescence sensor has a widely available pH range from 4.5 to 10 and an excellent response selectivity to sulfide only even in the presence of various other anions. Based on this chemosensor, a rapid, selective and sensitive luminescence method for the detection of sulfide anions in wastewater samples was established. The coefficient variations (CVs) of the method are less than 3.1%, and the recoveries are in the range of 90.9-108.5%. (C) 2011 Elsevier B.V. All rights reserved.