title: A highly sensitive and selective visible-light excitable luminescent probe for singlet oxygen based on a dinuclear ruthenium complex.
abstract: A dinuclear Ru(ii) complex of [(bpy)2Ru(H2ipaip)Ru(bpy)2]Cl4{bpy = 2,2'-bipyridine, H2ipaip = 2-(9-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)anthracen-10-yl)-1H-imidazo[4,5-f][1,10]phenanthroline} is newly synthesized and characterized. Singlet oxygen sensing and ground- and excited-state acid-base properties of this complex are studied. The results indicated that the complex acted as a highly sensitive and selective luminescent probe for singlet oxygen (1O2) in neutral and alkaline aqueous media under visible light excitation at 458 nm, resulting in 5.2- and 7.6-fold emission enhancement, respectively. This probe has advantages of visible light excitation, low singlet oxygen detection limits of 2.7-3.1 nM and high water solubility, thus holding great potential for applications in biological systems.
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P.R. China. kzwang@bnu.edu.cn and College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing 655000, P.R. China.
authors.forename: Hong-Ju
authors.initials: HJ
authors.lastname: Yin
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P.R. China. kzwang@bnu.edu.cn.
authors.forename: Yan-Ju
authors.initials: YJ
authors.lastname: Liu
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P.R. China. kzwang@bnu.edu.cn.
authors.forename: Jie
authors.initials: J
authors.lastname: Gao
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P.R. China. kzwang@bnu.edu.cn.
authors.forename: Ke-Zhi
authors.identifier: http://orcid.org/0000-0003-2642-1770
authors.initials: KZ
authors.lastname: Wang