Interaction between water-soluble rhodium complex RhCl(CO)(TPPTS)₂ and surfactants probed by spectroscopic methods

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• 作者：Li-Mei Zhou^a ; ^b ; Cai-Hong Guo^a ; Hai-Yan Fu^a ; Xiao-Hui Jiang^a ; ^b ; Hua Chen^a ; ^{scuhchen@163.com} ; Rui-Xiang Li^a ; Xian-Jun Li^a
• 关键词：UV&ndash ; vis ; Fluorescence spectroscopy ; 1H NMR ; Water-soluble rhodium complex ; Surfactant ; Interaction
• 刊名：Spectrochimica Acta Part A ; Molecular and Biomolecular Spectroscopy
• 出版年：2012
• 期刊代码：99_13861425
• 类别：ch
• 出版时间：July, 2012
• 卷：93
• 期：Complete
• 页码：198-202
• 文件大小：355 K

摘要

The interactions of rhodium complex RhCl(CO)(TPPTS)₂ [TPPTS = P(m-C₆H₄SO₃Na)₃] with cationic, nonionic, and anionic surfactants have been investigated by UV-vis, fluorescence and ¹H NMR measurements. The presence of four different species of RhCl(CO)(TPPTS)₂ in cationic cetyltrimethylammonium (CTAB) solution has been demonstrated: free rhodium complex, rhodium complex bound to CTAB monomer, rhodium complex bound to CTAB premicelles, rhodium complex bound to CTAB micelles. The spectroscopy data show that RhCl(CO)(TPPTS)₂ can adsorb on the interface of cationic CTAB micelles by strong electrostatic attraction, weakly bind to the nonionic polyoxyethylene (20) sorbitan monolaurate (Tween 20) micelles by hydrophobic interaction, and does not interact with anion sodium dodecyl sulfate (SDS) micelles due to the strong electrostatic repulsion.