Thermal studies of cobalt,iron and tin metalloporphyrins |
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Authors: | S D Gokakakar A V Salker |
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Institution: | (1) Department of Chemistry, Goa University, Goa, 403 206, India; |
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Abstract: | A free-base tetraphenyl porphyrin (TPP) and its corresponding metalloporphyrins (MTPP) where M = Co, Fe and Sn were synthesized
and characterized by UV–visible spectroscopy, FTIR and 1Hnmr spectroscopy. Thermal studies of these porphyrins were carried out in synthetic air from room temperature to 800 °C using
thermal analyser. The residues of MTPP after thermal treatment were qualitatively analysed, which showed the presence of corresponding
metal oxides. Further, the above MTPP were subjected to thermogravimetry–evolved gas and mass spectrometry (TG–EGA–MS) analysis
for the detailed information about evolved gases at their corresponding decomposition temperatures. This information may be
used to predict the probable mechanism for ring opening of the macromolecular porphyrins. |
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