title: [Ru(bpy)(3-n)(dpb)(n)](2+): unusual photophysical property and efficient DNA photocleavage activity.
abstract: The sequential replacement of a bpy ligand (bpy = 2,2'-bipyridine) by a dpb ligand (dpb = 2,3-bis(2-pyridyl) benzoquinoxaline) in the series [Ru(bpy)(3-n)(dpb)(n)](2+) (n = 1-3) leads to a remarkable increase of the excited state lifetime, the (1)O(2) quantum yield, and the binding affinity toward dsDNA, rendering both [Ru(bpy)(dpb)(2)](2+) and [Ru(dpb)(3)](2+) efficient DNA photocleavage activities upon red light irradiation (>or=600 nm).
authors.affiliation: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
authors.forename: Qian-Xiong
authors.initials: QX
authors.lastname: Zhou
authors.forename: Wan-Hua
authors.initials: WH
authors.lastname: Lei
authors.forename: Yi
authors.initials: Y
authors.lastname: Sun
authors.forename: Jing-Rong
authors.initials: JR
authors.lastname: Chen
authors.forename: Chao
authors.initials: C
authors.lastname: Li
authors.forename: Yuan-Jun
authors.initials: YJ
authors.lastname: Hou
authors.forename: Xue-Song
authors.initials: XS
authors.lastname: Wang
authors.forename: Bao-Wen
authors.initials: BW
authors.lastname: Zhang
mesh_terms: D015082:2,2'-Dipyridyl / Q000737:chemistry*; D004247:DNA / Q000737:chemistry*; D053837:DNA Cleavage; D008024:Ligands; D008027:Light; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D010777:Photochemistry; D011789:Quantum Theory; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D008024:Ligands; D009942:Organometallic Compounds; D015082:2,2'-Dipyridyl; D012428:Ruthenium; D004247:DNA; D010100:Oxygen