Photoinduced energy transfer within hydrogen-bonded multi-component assemblies based on a ruthenium–polypyridyl donor and an osmium–polypyridyl or ferrocenyl acceptor
摘要:
在[Ru(bipy)3]2+、[Os(bipy)3]2+ 和二茂铁发色团上附加的胞嘧啶和鸟嘌呤的互补 H 键能力的驱动下,通过利用各种构建模块的发光特性以及它们之间发生的能量转移过程,探究了多方结合体的形成。
Photoinduced energy transfer within hydrogen-bonded multi-component assemblies based on a ruthenium–polypyridyl donor and an osmium–polypyridyl or ferrocenyl acceptor
摘要:
在[Ru(bipy)3]2+、[Os(bipy)3]2+ 和二茂铁发色团上附加的胞嘧啶和鸟嘌呤的互补 H 键能力的驱动下,通过利用各种构建模块的发光特性以及它们之间发生的能量转移过程,探究了多方结合体的形成。
High nuclease activity of a copper(II)-bipyridyl complex containing cytosine pendants
作者:Jin-Tao Wang、Xiao-Hui Zheng、Liang-Nian Ji、Zong-Wan Mao
DOI:10.1080/00958972.2010.492216
日期:2010.7.20
A new copper(II) complex bearing 2,2 '-bipyridine (bpy) derivatives with cytosine nucleobases [Cu(L) Cl-2] center dot 2H(2)O has been synthesized and characterized, where L 5,5 '-di[(4-amino-2-oxo-1( 2H)-pyrimidinyl) methyl]-2,2 '-bipyridine. Circular dichroism spectra reveal interactions between ligand and pBR322 DNA and showed that the local DNA structure was perturbed by the ligand. Cleavage of pBR322 DNA by the title complex was carried out in 20 mmol L-1 HEPES (pH 7.5) at 37 degrees C. The calculated pseudo-Michaelis-Menten kinetic parameter (k(cat)) of the complex was 8.80 h(-1). The cleavage efficiency was 17-fold higher than that of its simple analog [Cu(bpy) Cl-2] (k(cat) 0.50 h(-1)). Hydrolytic mechanisms involved in DNA cleavage were explored using radical scavengers and T4 ligase. Competitive experiments with special binding agents showed that the complex could preferentially bind to the minor groove of double-stranded DNA, suggesting specific DNA binding characteristics. High DNA cleavage reactivity and selectivity of the complex could be attributed to the synergic effects of the metal center and the cytosine pendants.
Photoinduced energy transfer within hydrogen-bonded multi-component assemblies based on a ruthenium–polypyridyl donor and an osmium–polypyridyl or ferrocenyl acceptor
作者:Susana Encinas、Naomi R. M. Simpson、Paul Andrews、Michael D. Ward、Claire M. White、Nicola Armaroli、Francesco Barigelletti、Andrew Houlton
DOI:10.1039/b006503j
日期:——
Formation
of multipartite associates driven by the complementary H-bonding abilities of cytosine and guanine appended
to [Ru(bipy)3]2+, [Os(bipy)3]2+, and ferrocenyl chromophores is probed by exploiting the luminescence properties
of the
various building blocks and the energy transfer processes occurring between them.
在[Ru(bipy)3]2+、[Os(bipy)3]2+ 和二茂铁发色团上附加的胞嘧啶和鸟嘌呤的互补 H 键能力的驱动下,通过利用各种构建模块的发光特性以及它们之间发生的能量转移过程,探究了多方结合体的形成。