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Co(DC)2-NaDC凝胶复合络合物的研究
引用本文:孙颖,杨展澜,吴瑾光.Co(DC)2-NaDC凝胶复合络合物的研究[J].光谱学与光谱分析,1999,19(2):172-176.
作者姓名:孙颖  杨展澜  吴瑾光
作者单位:北京大学化学与分子工程学院,100871,北京
基金项目:国家自然科学基金,自然科学重点基金,北大-香港大学联合实验室资助
摘    要:本文利用红外光谱(FTIR)、X-射线粉末衍射谱,并配合ICP分析,对在水溶液中不同浓度和反应配比的NaDC脱氧胆酸钠和CoCl2反应生成的一系列脱氧胆酸金属络保物的组成和结构进行了研究。当NaDC的反应浓度在C.M.C以上,且Co^2+离子浓度较高时,或当NaDC的反应浓度在C.M.C以下时,Co^2+离子与单分子NaDC作用,生成结晶度很好的絮状Co(DC)2脱氧胆酸钴沉淀,其组成为Co(DC

关 键 词:脱氧胆酸钴  脱氧胆酸钠  胶团  凝胶  红外光谱

Study on the Co(DC)2-NaDC Mixed Micelle System
Ying SUN,Zhanlan YANG,Jinguang WU.Study on the Co(DC)2-NaDC Mixed Micelle System[J].Spectroscopy and Spectral Analysis,1999,19(2):172-176.
Authors:Ying SUN  Zhanlan YANG  Jinguang WU
Institution:College of Chemistry and Molecular Engineering, Peking University, 100871 Beijing.
Abstract:Eight coordinated complex samples of CoCl2-NaDC were obtained,using various concentration and initial molar ratio of CoCl2 and NaDC. They exhibited distinct appearances and characters. Their different structures and components were investigated by FTIR spectroscopy, X-ray diffraction analysis and ICP analysis. We can give the following conclusions: (1) when the concentration of NaDC is smaller than C.M.C, Co2+ ions react with mono-molecular NaDC and the component of the pink wadding-like resultant is Co(DC)2 x 3H2O. (2) When the concentration of NaDC is larger than C.M.C, and the concentration of CoCl2 is higher (0.5 mol/L), Co2+ ions destroy NaDC micelles, and the component of the pink wadding-like resultant is also Co(DC)2 x 3H2O. (3) When the concentration of NaDC is larger than C.M.C, and the concentration of CoCl2 is lower (0.1 mol/L or more lower), Co(DC)2 and NaDC may form mixed micelles, and some of NaDC micelles connect with each other through the Co2+ bridges to produce complicate Co(DC)2-NaDC complex with gel character and macromolecular network structure. In human body,the concentration of metal ions is usually lower and the concentration of NaDC is larger than C.M.C, So the third kind is suggested as an ideal model of the interaction between Co2+ ions and NaDC in vivo.
Keywords:Cobalt deoxycholate    Sodium deoxycholate    Micelle    Gel    FTIR  
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