Liu Weiya, Guo Rong
Key Laboratory of Mesoscopic Chemistry, Ministry of Education, Department of Chemistry, Nanjing University, Nanjing 210093, People's Republic of China.
J Colloid Interface Sci. 2005 Oct 15;290(2):564-73. doi: 10.1016/j.jcis.2005.04.061.
Electronic absorption spectra, fluorescence emission spectra, ATR-FTIR spectra, cyclic voltammetric measurements, and ab initio quantum calculation are used to study the properties of morin in CTAB micelles with different microstructures and microenvironments and to gain information about the binding of morin with CTAB micelles. Morin can be located in the CTAB micelle with its phenyl group (deviating with 38.98 degrees from the planarity) only in the form of the monomer, which leads to increase of the planarity and extension of the pi conjugation of the whole molecule. The embedding of two hydroxyl groups on the phenyl into a more hydrophobic microenvironment makes the oxidation peak of morin move to a higher potential with a decreased peak current. The binding of morin with CTAB micelles is a spontaneous (DeltaG<0) and endothermic process (DeltaH>0), and the hydrophobic and electrostatic force is the main driving force for its solubilization.
利用电子吸收光谱、荧光发射光谱、衰减全反射傅里叶变换红外光谱、循环伏安测量以及从头算量子计算来研究桑色素在具有不同微观结构和微环境的十六烷基三甲基溴化铵（CTAB）胶束中的性质，并获取有关桑色素与CTAB胶束结合的信息。桑色素只能以单体形式存在于CTAB胶束中，其苯基（与平面度偏差38.98度）位于胶束内，这导致整个分子的平面度增加和π共轭扩展。苯基上的两个羟基嵌入到更疏水的微环境中，使得桑色素的氧化峰向更高电位移动，且峰电流降低。桑色素与CTAB胶束的结合是一个自发过程（ΔG<0）且为吸热过程（ΔH>0），疏水和静电力是其增溶的主要驱动力。
