Title

Thermogravimetric Study of Ionic Pt(II) Complexes Containing Bis(Diphenylthiophosphinyl)Methane

Abstract

The TG-DTG and DTA study of dipositive platinum(II) complexes of the general formula [Pt(L-L)(dppmS2)](ClO4)2, where dppmS2 = Ph2P(S)CH2P(S)Ph2 and L-L = dppm (Ph2PCH2PPh2), dppe (Ph 2PCH2CH2PPh2), and dppp (Ph 2PCH2CH2CH2PPh2), were studied by thermogravimetric analysis from ambient temperature to 1000°C in nitrogen atmosphere. The decomposition occurred in one stage for [Pt(L-L)dppmS2](ClO4)2, [Pt(L-L)dpppS 2](ClO4)2 and [Pt(L-L)dppmS2] (ClO4)2 complexes. The values of activation energy, E, frequency factor, A, reaction order, n, entropy change, ΔS≠, enthalpy change, ΔH≠, and Gibss free energy change, ΔG≠, of the thermal decomposition were calculated by means of Coats-Redfern method (CR), MacCallum-Tanner method (MC) and van Krevelen method (vK). The activation energy values obtained by CR, MC and vK methods were in good agreement with each other.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Activation energy; Ionic Pt(II) complexes; Thermal behaviour

International Standard Serial Number (ISSN)

1375083

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2009 Polish Chemical Society, All rights reserved.

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