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Non‐isothermal kinetics of the decomposition reaction of cluster [Ag 3 WS 3 Br](PPh 3 ) 3 and [Cu 3 WS 3 Br](PPh 3 ) 3
Author(s) -
Lu ZhenRong,
Ding YuanChen,
Xu Ying,
Liu Quan,
Lang JianPing
Publication year - 2004
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20040221008
Subject(s) - chemistry , moiety , isothermal process , decomposition , thermal decomposition , kinetics , phosphine , cluster (spacecraft) , nitrogen , medicinal chemistry , analytical chemistry (journal) , inorganic chemistry , stereochemistry , thermodynamics , organic chemistry , physics , quantum mechanics , computer science , programming language , catalysis
The thermal behaviors of clusters [Ag 3 WS 3 Br](PPh 3 ) 3 and [Cu 3 WS 3 Br](PPh 3 ) 3 (PPh 3 =triphenyl phosphine) in a nitrogen atmosphere were studied under the non‐isothermal conditions by simultaneous TG‐DTG‐DSC and EDS techniques. The results showed that the evolution of PPh 3 generally proceeded before the release of the other moiety in one or two step‐mode. The mechanisms, the kinetic and the thermodynamic parameters for decomposition of PPh 3 of both clusters were determined and calculated by jointly using several methods, which showed that its evolution was controlled by Avrami‐Erofeev equation. The results also showed that there was no new stable phase composed of W‐Ag(Cu)‐S‐Br after release of organic moiety PPh 3 and that CVD method was not applicable to their further processing.