Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 70: Issue 3
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
Authors: Z. Lu 1 , Y. Ding 1 , Y. Xu 1 , Z. Yao 1 , Q. Liu 1 , and J. Lang 2
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  • 1 Suzhou University The Testing and Analysis Center, The Central Laboratory Suzhou, Jiangsu 215006 P.R. China Suzhou, Jiangsu 215006 P.R. China
  • 2 Suzhou University Departments of Chemistry and Chemical Engineering Suzhou, Jiangsu 215006 P.R. China Suzhou, Jiangsu 215006 P.R. China
DOI:
https://doi.org/10.1023/a:1022237126976
Page Count:
985–994
Publication Date:
01 Oct 2002
Online Publication Date:
03 Nov 2004
Article Category:
Research Article
Restricted access

Abstract  

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.

Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943
Keywords:
thermal decomposition; W/Cu/S cluster; non-isothermal kinetics; [MS3]-; Mo/Cu/S cluster

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