1－苯基－5－巯基四氮唑对胶态金催化Co（Ⅲ）络合物氧化对苯二胺彩显剂的反应的影响  

THE INFLUENCE OF 1-PHENYL-5-MERCAPTOTETRAZOLE ON THE OXIDATION OF p-PHENYLENEDIAMINE WITH Co(III)-COMPLEXES CATALYZED BY AU SOL

作　　者：莫亦波 赵文芳[1] 胡萍[1] 任新民[1] 

机构地区：[1]中国科学院感光化学研究所

出　　处：《感光科学与光化学》1995年第1期22-27,共6页Photographic Science and Photochemistry

基　　金：中国科学院自然科学基金

摘　　要：本文在碱性介质中，研究了ＰＭＴ（１－苯基－５－巯基四氮唑）存在时胶态金催化Ｃｏ（ＮＨ＿３）＿６Ｃｌ＿３氧化对苯二胺彩显剂（ＰＰＤ）的动力学，反应跟踪是通过可见紫外分光光度计监测ＰＰＤ的完全氧化产物，ＱＤＩ的显色反应来进行的。结果表明，在ｐＨ为１０．２０，且胶态金的初始浓度一定时，ＰＭＴ对反应初始速率有较大的影响：ＰＭＴ的初始浓度［ＰＭＴ］。较小时，对反应有抑制作用：而［ＰＭＴ］。较大时，对反应有促进作用。通过在无ＰＭＴ、低［ＰＭＴ］。高［ＰＭＴ］。时对上述反应动力学的测定，我们推测ＰＭＴ对反应的抑制－促进作用是由于ＰＭＴ在胶态金上吸附状态的变化造成的。实验表明，当胶态金的初始浓度一定时，ＰＭＴ对［Ｃｏ（ＮＨ＿３）＿５Ｃｌ］Ｃｌ＿２氧化ＰＰＤ的反应也有类似作用。In this paper,the catalysis of Au sol in the reaction of [Co(NH_3)_5]Cl_3 with P-phenylenediamine(PPD)was studied in the presence of 1-phenyl-5-mercaptoterrazole(PMT).When pH =10.20 at 25℃,it was found that PMT influences the initial reactionrate strongly:PMT restrains the reaction when [PMT]。is low,and accelerates the reactionwhen [PMT]is high. By means of determining the kinetic parameters,the possile mechanism was discussed.It was proposed that the restraining-accelerating effect may be caused by the change of absorption state of PMT on Au sol.It was found that the similar phenomenal so exists when [Co(NH_3)_6]Cl_3 is replaced by [Co(NH_3)_5Cl]Cl_2.

关 键 词：胶体催化 络合物 显影 氧化 苯二胺 彩色显影剂 

分 类 号：O625.631[理学—有机化学] TQ571.6[理学—化学]