分子光开关钌配合物[Ru（phen）2（phehat）]^2＋的光谱研究

运用TDDFT方法,分子光开关钌配合物[Ru（phen）2（phehat）]^2＋的UV—Vis光谱得以计算和理论解释。计算表明在水溶液环境下对钌配合物进行计算,实验结果和计算结果一致。而且,溶液条件下计算的UV-Vis光谱的结果能较好的指认该配合物实验光谱的^1MLCT和^1LLCT性质。     

功能性钌配合物[Ru(phen)2(mdpz)]2+的电子吸收光谱研究

运用含时密度泛函(TDDFT)方法,对功能性钌配合物[Ru(phen)2(mdpz)]2+的UV-Vis光谱进行计算和理论解释。计算结果表明在乙氰溶液环境下的计算结果与实验结果符合较好。并且,乙氰溶液条件下计算的UV-Vis光谱的结果能较好的指认该配合物实验光谱的1MLCT和1LLCT性质。     

DNA分子光开关钌配合物[Ru(phen)2(dppz)]2+的研究进展

综述了近20年来典型的DNA-分子光开关钌(Ⅱ)多吡啶类配合物[Ru(phen)2(dppz)]2+在实验和理论上的研究进展与应用.阐明了该配合物的结构特征及其与DNA的作用机理、作用模式以及在一些相关热点问题上的争议,同时还介绍了该配合物在DNA-结构识别及定量分析等方面的重要应用.基于此,还对DNA-分子光开关钌配合物的开发作了展望.     

钌多吡啶配合物作为DNA结构探针的研究进展

对具代表性的钌多吡啶配合物与DNA相互作用的结合模式及其作为DNA结构探针的研究和应用进行了综述 ,涉及文献 34篇     

含柔性插入配体的钌(Ⅱ)配合物的合成及其与DNA作用研究

设计合成一个柔性插入配体dcpip（dcpip=2-（2,3-环己烯基眯唑并[4,5-f]邻菲咯啉）及其钌（Ⅱ）多吡啶配合物[Ru（bpy）2（dcpip）]（ClO4）2（bpy=2,2＇-联吡啶）和[Ru（phen）2（dcpip）]（ClO4）2（phen=1,10-邻菲咯啉）。采用元素分析和质谱对其进行表征。用电子吸收光谱、荧光光谱和粘度测试研究配合物与DNA作用。研究结果表明,配合物与DNA之间通过插入作用结合。     

氨基硫脲型钌配合物的合成和结构研究

金属有机物有着较好的亲脂性,金属原子低氧化态为合成具有金属特性的抗癌药物提供丰富的选择余地。采用苯甲醛和3-硫代氨基脲反应制备苯甲醛缩3-硫代氨基脲,将苯甲醛缩3-硫代氨基脲作为配体与钌前驱体[Ru(p-cymene) Cl_2]_2反应制备苯甲醛缩3-硫代氨基脲配合物,采用Nicolet FT-360红外光谱仪对其红外光谱进行研究,并对其结构分析。化合物1的红外光谱谱图3444. 27和3248. 13 cm~(-1)的吸收峰归因于NH_2,NH伸缩振动,1629. 97 cm~(-1)的吸收峰归因于C=N振动,1135. 53 cm~(-1)的吸收峰归因于C=S振动。该研究丰富了金属有机物的谱图库。     

[Cu（phen）（L-set）（H2O）]Cl与DNA作用的研究

用循环伏安法（CV）、微分脉冲伏安法（DPV）和可见吸收光谱法研究[Cu（phen）（L—ser）（H2O）]Cl与鲱鱼精DNA的相互作用。CV、DPV法研究显示,加入DNA后,配合物的氧化还原峰电流降低,氧化峰电位正移,表明配合物与DNA发生插入作用。同时,利用溴化乙锭（EB）作指示剂,进行可见吸收光谱法研究,同样表明配合物与DNA发生插入作用。     

[Cu（phen）（L-set）（H2O）]Cl与DNA作用的研究

用循环伏安法（CV）、微分脉冲伏安法（DPV）和可见吸收光谱法研究[Cu（phen）（L—ser）（H2O）]Cl与鲱鱼精DNA的相互作用。CV、DPV法研究显示,加入DNA后,配合物的氧化还原峰电流降低,氧化峰电位正移,表明配合物与DNA发生插入作用。同时,利用溴化乙锭（EB）作指示剂,进行可见吸收光谱法研究,同样表明配合物与DNA发生插入作用。     

抗癌钌配合物NAMI-A和ICR的合成、水解及其与DNA的相互作用

以RuCl3、DMSO、Im为原料合成了抗癌钌配合物NAMI-A和ICR,进行必要的表征.利用紫外-可见吸收光谱研究了它们在水、DMSO的水溶液、磷酸缓冲溶液(PBS)中的水解情况及其在磷酸缓冲溶液中与DNA相互作用.结果表明,钌配合物在水、DMSO的水溶液和磷酸缓冲溶液(PBS)中的水解性质有较大的差距,与DNA可能以配体嵌插或沟槽作用方式结合.     

Enantiopreferential DNA-binding of a novel dinuclear complex [(bpy)2Ru(bdptb)Ru(bpy)2]4+

A novel dinuclear ruthenium(II) complex [(bpy)₂Ru(bdptb)Ru(bpy)₂]⁴⁺ (bpy=2,2^′-bipyridyl; bdptb=2,2^′-bis(5,6-diphenyl-1,2,4-triazin-3-yl)-4,4^′-bipyridine) has been synthesized and characterized. The DNA-binding behaviors of this complex have been studied by viscosity, absorption and circular dichroism (CD) spectra. It has firstly been found that the dinuclear ruthenium(II) complex display the enantiopreferential DNA-binding after equilibrium dialysis.     

Aggregation-induced emission of ruthenium(II) polypyridyl complex [Ru(bpy)2(pzta)]2+

A new ruthenium(II) complex [Ru(bpy)₂(pzta)]²⁺ (1) [bpy = 2,2′-bipyridine; pzta = 6-(pyrzin2-yl)-1,3,5-triazine-2,4-diamine] has been synthesized and characterized. This complex exhibits a typical aggregation-induced emission (AIE) behavior that it is faint in solution but intense in the aggregate state.     

DNA-enhanced assembly of [Ru(bpy)2ITATP] on an ITO electrode

A novel technique for controllable assembly of [Ru(bpy)₂ITATP]^3+/2+ (where bpy = 2,2′-bipyridine, ITATP = isatino[1,2-b]-1,4,8,9-tetraazatriphenylene) on an ITO electrode in the absence and presence of calf thymus DNA is proposed. The [Ru(bpy)₂ITATP]^3+/2+ and double stranded DNA is assembled onto the ITO electrode using repetitive voltammetric sweeping. The assembly is confirmed by ex situ cyclic voltammetry and the fluorescence microscopy. A pair of diffusion-controlled waves and prewaves for [Ru(bpy)₂ITATP]^3+/2+ is observed in the voltammetric sweeping process. The formal potential of the prewaves is found to be much negative than that of the diffusion-controlled waves. The controllable assembly of [Ru(bpy)₂ITATP]^3+/2+ on the ITO surface is accelerated by DNA and affected by ionic strength. With this DNA-prompted electrochemical technique, a multifunctional biomolecular film containing surface-confined redox center of controllable thickness is fabricated.     

[Ir(H)(OH)]~+活化甲烷的密度泛函理论研究

对[Ir(H)(OH)]+活化甲烷反应进行了详细的密度泛函理论研究,并与Pt(H)(OH)+/CH4以及Ir H+/CH4的反应体系进行了比较。计算结果表明[Ir(H)(OH)]+活化甲烷的反应是经一个过渡态通过一步协同反应来完成的。在整体反应过程中,我们根据Yoshizawa单点垂直计算的方法,并没有在高低自旋态的势能面上找到交叉缝,也就是说没有交叉点出现在反应路径中,反应是以自旋守恒的方式在基态三重态势能面上进行的。     

pH responsive “off–on–off” luminescent switch of a novel ruthenium(II) complex [Ru(bpy)2(pipipH2)]2+

A novel ruthenium(II) complex, [Ru(bpy)₂(pipipH₂)](ClO₄)₂ · H₂O (1) (pipipH₂ = 2-(4-(1H-phenanthro[9,10-d]imidazol-2-yl)phenyl)-1H- imidazo[4,5-f][1,10] phenanthroline, bpy = 2,2^′-bipyridine) has been found to act as a luminescent pH switch with extraordinary sensitivity through protonation and deprotonation of the bis-imidazole-containing ligand pipipH₂ in aqueous solution at room temperature.     

联吡啶钌体系电致化学发光测定精胺的研究

基于精胺对Ru（bpy）32＋电化学发光的显著增强效应,利用池内停流技术,建立了精胺的电化学发光测定法。本方法具有灵敏度高,线性范围宽和分析速度快的特点。在最优条件下,相对电化学发光值与精胺浓度在5×10-8~5×10-5mol/L范围内呈现良好的线性关系,对5×10-8mol/L浓度的精胺进行11次平行测定,其相对标准偏差为3.03%,检出限为2.31×10-8mol/L。     

DNA-promoted electrochemical assembly of [Ru(bpy)2IP] at an ITO electrode

A controllable assembly technique of [Ru(bpy)₂IP]^3+/2+ (where bpy = 2,2′-bipyridine and IP = imidazo[4,5,f][1,10]phenanthroline) promoted by calf thymus DNA at an ITO electrode is proposed. The stable assembled layer containing [Ru(bpy)₂IP]^3+/2+ and double stranded DNA is obtained on the ITO electrode using repetitive voltammetric sweeping, confirmed by ex situ voltammetry, X-ray photoelectron spectroscopy (XPS) and the inverted fluorescence microscopy. There exist two pairs of diffusion-controlled waves and two pairs of prewaves for [Ru(bpy)₂IP]²⁺ in the voltammetric sweeping process. The half-wave potentials of the prewaves are far more negative than those of the diffusion-controlled waves. These experimental results suggest that double stranded DNA is enable to accelerate and increase the controllable assembly of Ru(bpy)₂IP]^3+/2+ by using the ITO surface. The fluorescence microscopy imaging reveals that [Ru(bpy)₂IP]^3+/2+ has the ability to bind with double strand DNA. The fluorescence intensity of [Ru(bpy)₂IP]^3+/2+ with DNA is stronger than that without DNA.     

A novel DNA light switch [Ru(bpy)2pzip]2+ activated by cobalt(II) ion

A novel ruthenium(II) complex, [Ru(bpy)₂pzip]²⁺ has been synthesized and characterized. The DNA-binding properties of this complex have been studied by spectroscopic and viscosity measurements. The results indicated that the complex [Ru(bpy)₂pzip]²⁺ bound to double-stranded DNA in an intercalation mode. In the presence of Co²⁺, the emission of DNA–[Ru(bpy)₂pzip]²⁺ can be quenched. And when EDTA was added, the emission was recovered. The experiment results show that [Ru(bpy)₂pzip]²⁺ exhibited the “on–off–on” properties of molecular “light switch”.     

DNA-promoted electrochemical assembly of [Ru(bpy)2dpp] on the ITO electrode by introducing copper(II) ion

The electrochemical assembly of [Ru(bpy)₂dpp]^3+/2+ (where bpy = 2,2′-bipyridine, dpp = 2,3-bis (2-pyridyl) pyrazine) promoted by calf thymus DNA on an ITO electrode based on the introduction of copper(II) ion has been investigated. There exists a diffusion-controlled wave and two prewaves for the complex in the differential pulse voltammetric sweeping process. The formal potential of the high prewave shift ca. 0.530 V negatively compared with that of the diffusion-controlled wave. Dpp ligand with two vacant chelating N sites in the complex can bite Cu²⁺ and the resultant heterometallic complex shows a weakened assembly in contrast to that of [Ru(bpy)₂dpp]^3+/2+ alone. Furthermore, double stranded DNA is able to accelerate the assembly of the ruthenium complex and heterometallic complex generated by chelating with Cu²⁺ by using the ITO surface, the prompted strength of the latter is far stronger than the former. Their assembled mechanism enhanced by DNA is proposed.