摘要
合成了2,3-二甲基-1,4,8,9-四氮三联苯(dm tatp)和2,3-二苯基-1,4,8,9-四氮三联苯(dptatp)两种新配体及它们与 2,2′-联吡啶和钌(Ⅱ)的混配物[Ru(bpy)2dm tatp]2+ (1)和[Ru(bpy)2dptatp]2+ (2), 用电子吸收光谱、稳态荧光、粘度测定和圆二色谱研究了配合物与小牛胸腺DNA的相互作用. 结合我们以前对配合物[Ru(bpy)2tatp]2+ (3) (tatp 为1,4,8,9-四氮三联苯)与小牛胸腺DNA的作用研究, 得出配合物与DNA的键合强度顺序为: [Ru(bpy)2tatp]2+ >[Ru(bpy)2dptatp]2+ > [Ru(bpy)2dm tatp]2+ , 这与插入配体的位阻效应的减少趋势相一致. 同时,还测定了配合物与DNA的键合常数.
Two structurally related ligands dmtatp(2,3 dimethyl 1,4,8,9 tetraazatriphenylene), dptatap(2,3 diphenyl 1,4,8,9 tetraazatriphenylene) and their ruthenium(Ⅱ) complexes [Ru(bpy) 2dmtatp] 2+ (1) and [Ru(bpy) 2dptatp] 2+ (2) were synthesized and characterized. Combined with the previous study data of [Ru(bpy) 2tatp] 2+ (3, tatp=1,4,8,9 tetraazatriphenylene) the steric influence of the intercalated ligand of these complexes on DNA binding were investigated by electronic absorption, steady state luminescence, CD spectra and viscosity measurement. All the data suggested that the complexes bind with DNA by intercalation and the order of binding affinities is 3>2>1, consistent with the reduced steric effect of the intercalated ligand.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第11期1661-1666,共6页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
广东省自然科学基金
中国科学院上海有机化学研究所生命有机化学国家重点实验室资助
关键词
多吡啶钌
DNA
插入作用
位阻效应
探针
结构
Ruthenium(Ⅱ) polypyridyl
Calf thymus DNA
Intercalation
Steric effect