某些氰基甲(月无无日)类试剂与表面活性剂的作用机理

STUDIES ON MECHANISM OF INTERREACTION OF SOME CYANOFORMAZAN DERIVATIVES WITH SURFACTANTS

本文研究了表面活性剂对1,5-二(2-羟基-5-氯苯基)-3-氰基甲(月朁)(HCPCF)及1,5-二(2-羟基-5-磺基苯基)-3-氰基甲(月朁)(HSPCF)以及其金属络合物吸收光谱的影响;通过对电泳、析相等现象的分析,探讨了HCPCF、HSPCF及其相应络合物反应行为的差别;讨论了胶束对络合反应速度的影响。

The effect of surfactants on the absorption spectra of 1,5-bis-(2-hydroxy-5-chlorophenyl)-3-cyanoformazan (HCPCF) and l,5-bis-(2-hydroxy-5-sulfo-phenyl)-3-cyanoformazan (HSPCF) and their metallic ion complexes has been investigated. The mechanism of the difference in the interreaction of HCPCF and HSPCF and the corresponding complexes has been interpreted by analysing phenomena concerning electrophoresis and phase separation. For HCPCF and its complexes, the direction of migration under electric field is determined by the charge of the micelle. The presence of Tween-80 has no effect on the migration direction of HSPCF and its complexes, while TPC reverses the migration direction of HSPCF and its metallic complexes. On the basis of these phenomena it has been shown that HCPCF and its complexes can enter into the micellar phase of both cationic and nonionic surfactants, on the other hand HSPCF as well as its complexes can not enter into the micelle of nonionic surfactants. This conclusion has been confirmed by phase separation experiments above the cloud point. The effect of surfactant micelles on the complex formation reaction rate has also been discussed.