title: Development of a heterobimetallic Ru(II)-Cu(II) complex for highly selective and sensitive luminescence sensing of sulfide anions.
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-methylene]-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%.
authors: State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, China.
authors: Run
authors: R
authors: Zhang
authors: Xiaojing
authors: X
authors: Yu
authors: Yuejiao
authors: Y
authors: Yin
authors: Zhiqiang
authors: Z
authors: Ye
authors: Guilan
authors: G
authors: Wang
authors: Jingli
authors: J
authors: Yuan