TA on Mo(W)/Cu(Ag)/S clusters derived with [Cp*MS3]- Kinetics of [PPh4]2[Cp*WS3(CuBr)3]2 and [PPh4]2[Cp*MoS3(CuBr)3]2

被引:0
作者
Z. Lu
Y. Ding
Y. Xu
Z. Yao
Q. Liu
J. Lang
机构
[1] Suzhou University,The Testing and Analysis Center, The Central Laboratory
[2] Suzhou University,Departments of Chemistry and Chemical Engineering
来源
Journal of Thermal Analysis and Calorimetry | 2002年 / 70卷
关键词
thermal decomposition; W/Cu/S cluster; non-isothermal kinetics; [MS3]-; Mo/Cu/S cluster;
D O I
暂无
中图分类号
学科分类号
摘要
Thermal analysis on two new heterometallic sulfide clusters, [PPh4]2[WS3(CuBr)3]2 and [PPh4]2[MoS3(CuBr)3]2 (where PPh4=tetraphenyl phosphonium, =pentamethylcyclopenta- dienyl), was carried out using a simultaneous TG-DTA unit in an atmosphere of flowing nitrogen and at various heating rates. Supplemented using EDS method, their thermal behavior and properties, together with the composition of their intermediate product, were examined and discussed in connection with their distinctive molecular structure as a dianion, which provided some theoretically and practically significant information. Both clusters decomposed in a two-step mode, but without a stable new phase composed of Mo/W-Cu-S formed during their decomposition process as we expected. Based on TG-DTG data, four methods, i.e. Achar-Brindley-Sharp, Coats-Redfern, Kissinger and Flynn- Wall-Ozawa equation, were used to calculate the non-isothermal kinetic parameters and to determine the most probable mechanisms.
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页码:985 / 994
页数:9
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