摘要:
用紫外-可见光谱法测定了包合温度为30°C时,β-环糊精与PBTCA(2-磷酸基-1,2,4-三羧酸丁烷)、HEDP(羟基乙叉二膦酸)包合物的包合常数分别为:658.0、349.7,包合物的稳定性较弱.并根据在30°C、40°C、45°C、50°C下测得的包合常数,结合Van'tHoff方程计算出包合过程热力学参数△H,△S和△G均为负值,表明包合反应是放热反应且能自发进行,焓变是形成包合物的主要驱动力.%The binding constants of β-Cyclodextrin with PBTCA,HEDP is 658.0,349.7,respectively,determined by fluorescence spectrometry at 30 °C,the stability of inclusion compound is poor.The binding constants at 30 °C,40 °C,45 °C,5 0°C were obtained and the enthalpy change ΔH,entropy change ΔS,Gibbs f ree energy ΔG,were calculated by Van't Hoff formulae.ΔH,ΔS and ΔG were negative,suggesting that the inclusion interaction was exothermic and spontaneously,enthalpy is the main driving force.