Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-09-14

Journal: DALTON TRANSACTIONS

Included Journals: Scopus、SCIE、PubMed、EI

Volume: 43

Issue: 34

Page Number: 13055-13060

ISSN: 1477-9226

Abstract: A novel dinuclear ruthenium(II)-copper(II) complex, [Ru(bpy)(2)(phen-cyc)Cu](PF6)(4) (bpy: 2,2'-bipyridine; cyc: 1,4,7,10-tetraazacyclododecane; phen: 1,10-phenanthroline), has been designed and synthesized by conjugating a ruthenium(II) complex with a cyclen-Cu2+ complex. This has almost no luminescence due to the efficient quenching by Cu2+ of the luminescence of the ruthenium(II) complex. In aqueous media, the reaction of [Ru(bpy)(2)(phen-cyc)Cu](PF6)(4) with hydrogen sulfide results in the release of the Cu2+ from the azamacrocyclic ring, accompanied by a similar to 130-fold increase in the luminescence intensity at 605 nm with a 159 nm Stokes shift. The dose-dependent luminescence enhancement shows a good linearity in a concentration range of 2.0 to 20 mu M, with a detection limit of 21.6 nM for hydrogen sulfide. In addition, the luminescence response of [Ru(bpy)(2)(phen-cyc)Cu](PF6)(4) to hydrogen sulfide is very rapid and widely available in the pH range of 3.0-9.5. It also has excellent selectivity so it can distinguish hydrogen sulfide with no interference by other anions and amino acids. On the basis of these features, a rapid, highly selective and sensitive luminescence method for the detection of hydrogen sulfide under physiological conditions was established, using [Ru(bpy)(2)(phen-cyc)Cu](PF6)(4) as a probe.