Thermogravimetric Study of Ionic Pt(II) Complexes Containing Bis(Diphenylthiophosphinyl)Methane
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.
F. Dogan and S. Irisli, "Thermogravimetric Study of Ionic Pt(II) Complexes Containing Bis(Diphenylthiophosphinyl)Methane," Polish Journal of Chemistry, vol. 83, no. 1, pp. 1-6, Polish Chemical Society, Jan 2009.
Materials Science and Engineering
Keywords and Phrases
Activation energy; Ionic Pt(II) complexes; Thermal behaviour
International Standard Serial Number (ISSN)
Article - Journal
© 2009 Polish Chemical Society, All rights reserved.