英语翻译The 1H NMR spectra of complexes 1 and 2 are shown in Fig.1.The proton chemical shifts are assigned with the influence of steric,inductive and conjugative effects and compared with those of similar compounds [18].For each of the two comple

英语翻译The 1H NMR spectra of complexes 1 and 2 are shown in Fig.1.The proton chemical shifts are assigned with the influence of steric,inductive and conjugative effects and compared with those of similar compounds [18].For each of the two comple
英语翻译
The 1H NMR spectra of complexes 1 and 2 are shown in Fig.1.The proton chemical shifts are assigned with the influence of steric,inductive and conjugative effects and compared with those of similar compounds [18].For each of the two complexes,two sets of NMR signals were observed.One set corresponds to the bpy or dmb ligand,and the other set corresponds to the PyIP ligand.The proton resonance on the nitrogen atom of the PyIP imidazole ring was not observed,because the proton is active and exchanges quickly between the two nitrogen atoms of the imidazole ring.Owing to the repulsive interaction between two methyl substituent of each dmb ligand,along with the consideration of the bpy in complex 1,the chemical shifts of the protons located in the bipyridine ring of dmb are totally split in complex 2.
3.2 Absorption titration
Electronic absorption spectroscopy is one of the most useful methods to study DNA-binding of ruthenium(II) complexes.When DNA binding with Ru(II) complexes through intercalation,there used to cause hypochromism and bathchromism,because of strong stacking interaction between an aromatic chromophore and the base pairs of DNA.The hypochromism is proportion to the intercalative binding strength.The absorption spectra of complexes 1 and 2 in the presence of increasing amounts of CT-DNA are shown in Fig.2.With the increasing of DNA concentration,complex 1 exhibits the hypochromism of about 34% in the IL band (286 nm) at a ratio of [DNA]/[Ru] of 2.2.For complex 2,upon addition of DNA,the hypochromism in the IL band (285 nm) reaches as 29% at a ratio of [DNA]/[Ru] of 2.5.Both of these complexes have a slight red shift.These spectral characteristics suggest that there are some interactions between the complexes and DNA.

英语翻译The 1H NMR spectra of complexes 1 and 2 are shown in Fig.1.The proton chemical shifts are assigned with the influence of steric,inductive and conjugative effects and compared with those of similar compounds [18].For each of the two comple
该核磁共振光谱复合1和第2款中显示的图.1 .质子化学位移的分配与影响阻,电感和共轭效应和比较,与类似化合物[ 18 ] .每两个配合,两套核磁共振信号观察.一组对应到bpy或配体的DMB ,和另一套对应到pyip配体.质子共振对氮原子的pyip咪唑环是不遵守,因为质子是积极和交流,迅速两国之间的氮原子的咪唑环.由于排斥之间的相互作用二甲基取代每个配体的DMB ,随审议该bpy在复杂的一,化学位移的质子设在该联吡啶环的DMB是完全分裂,在复杂的2 .
3.2吸收滴定法
电子吸收光谱是其中一个最有用的方法,研究DNA结合钌（二）配合.当DNA结合,与茹（二）通过插层复合物,有用于事业hypochromism和bathchromism ,因为强大的堆叠之间的相互作用一芳香生色团和碱基对的DNA .该hypochromism是比例以插层结合强度.吸收光谱络合物1和2的存在,增加金额的CT - DNA的显示在图.2 .随着DNA浓度的,复杂的一展览hypochromism约34 ％ ,在白细胞介素波段（ 286 nm ）的一个比例[ DNA的] / [如] 2.2 .为复杂的二,后加入的DNA ,hypochromism在白细胞介素波段（ 285 nm ）的高达29 ％的比例[ DNA的] / [如] 2.5 .这两种复合物有轻微的红移.这些光谱特征表明,有一些互动,配合和DNA .