摘要
用紫外-可见光谱法研究了对-四羟基苯基卟啉(简称P0)在不同胶束体系中与Zn(Ⅱ),Cu(Ⅱ)的反应动力学,并对不同胶束微环境对P0与过渡金属离子络合的动力学影响进行了初步探讨.实验结果表明:当两种金属离子浓度大大过量时,P0与Cu(Ⅱ),Zn(Ⅱ)的反应为准一级反应,CuP0的生成速率远远大于ZnP0的生成速率,其原因与过渡金属离子的半径有关;在胶束体系中,增溶位置决定了P0与金属离子络合反应速率常数的大小,P0在不同类型的表面活性剂胶束中与金属离子络合的反应速率常数为KSDS>KCTAB>KTX-100.
The kinetics of 5,10,15,20-tetra（4-hydroxyphenyl）-porphyrin（P0） with Zn（Ⅱ）,Cu（Ⅱ） in micellar system have been investigated by UV-Vis spectra,and the dynamics effects of complexes at different micelles have been discussed preliminary.The results show that,the reaction of P0 with Cu（Ⅱ） and Zn（Ⅱ） is pseudo first-order when the two concentration of metal ion are in large excess,Metallation rate of P0 is effected by metal ions,the reaction rate constants in SDS and CTAB are KCu（Ⅱ）〉KZn（Ⅱ）.The reaction rate of P0 cooprated with Zn（Ⅱ）,Cu（Ⅱ） in micellar solution can be controlled by the solubilization site of P0 in micellar solution,the reaction rate constants of P0 in three micelles decreased in the sequence of KSDS〉KCTAB〉KTX-100.
出处
《中北大学学报（自然科学版）》
CAS
北大核心
2012年第4期453-456,461,共5页
Journal of North University of China(Natural Science Edition)
基金
山西省科技厅青年基金资助项目(2007021007)
