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The interaction of Methylthymol Blue(MTB)-Zinc(Ⅱ) compound and Alizarin Red S(ARS)-Aluminum(Ⅲ) compound with Bovine serum albumin (BSA) was investigated by UV-Vis spectrophotometric method in acidic buffer solution. MTB-Zn(Ⅱ)-BSA was a blue color compound, which possesses maximum absorption at 613 nm with 172 nm, 174 nm and 18 nm of red shift compared to the MTB, MTB-BSA and MTB-Zn(Ⅱ) complexes respectively. Dual wavelength substantial amount ratio method, balance dialysis substantial amount ratio method and unity wavelength substantial amount ratio method were compared. The following results were obtained: the apparent molar absorptivity of MTB-Zn(Ⅱ) with BSA was ε=2.20×104 L·mol-1·cm-1. Conditional proportion were defined, nMTB∶nZn(Ⅱ)∶nBSA=2∶2∶1; condition combination constant, K=2.07×1010. Combination proportion were defined, nARS∶nAl(Ⅲ)∶nBSA=6∶4∶1. Condition equilibrium constant of reaction of ARS-Al(Ⅲ) with BSA was K=8.80×108. The apparent molar absorptivity of ε=2.65×104 L·mol-1·cm-1. It is suggested that combination between BSA and MTB-Zn(Ⅲ) is due to coordination force. That combination between BSA and ARS-Al(Ⅲ) is due to the coordination bond and electrostatic force. 相似文献
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稀土掺杂金红石相TiO2的第一性原理的定性计算 总被引:6,自引:4,他引:2
稀土掺杂金红石相TiO2的禁带宽度(带隙)是影响其吸收波长的主要因素,其决定TiO2的光催化活性.利用第一性原理密度泛函理论(Ab initio DFT)得出17种稀土掺杂金红石相TiO2的能态密度(DOS),结果表明:除Lu、Y、Yb和Sc四种稀土增大金红石相TiO2带隙外,其余13种稀土均很大程度地降低金红石相TiO2的带隙.因此,稀土掺杂金红石相TiO2具有广阔的研究前景. 相似文献
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新疆水黑云母及其HDTMA 插层复合物的红外光谱研究 总被引:2,自引:1,他引:1
采用傅立叶转换红外光谱(FTIR)研究了新疆尉犁蛭石矿出产的水黑云母(HB)以及经十六烷基三甲基铵阳离子(HDTMA )插层后形成的HDTMA-HB复合物的红外吸收特征.结果表明,新疆水黑云母红外吸收主要可分为3个区域,同时具有蛭石和金云母的特征吸收峰;十六烷基三甲基铵离子能够插层进入水黑云母的蛭石晶层形成HDTMA-HB复合物,该复合物的红外吸收特征为HDTMA 和水黑云母吸收的结合体,只是某些特征吸收峰的峰位发生了不同程度的漂移;有机分子以类液态的形式存在于水黑云母层间;复合物中水的吸收峰仍然很强. 相似文献
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