Affiliation:
1. National Institute of Research and Development for Chemistry and Petrochemistry ICECHIM, 202 Splaiul, Independentei, Bucharest 060021, Romania
2. Valahia University, Faculty of Materials Engineering and Mechanics, 18-20 Unirii Blvd, Targoviste 013200, Romania
Abstract
Although tungsten porphyrins are known as mimicking models in biology, only a few papers about its chemical properties have been reported, the rarity of studies being attributed to the difficulties encountered in their synthesis due to their low stability. In this paper 5,10,15,20-tetra-p-phenyl-porphyrin tungsten(VI) chlorine (TPPWCl4) was studied, this metallo-porphyrin characterized by different analytical techniques: UV-vis, FTIR, ESR, mass spectrometry, including photophysical determination of its singlet oxygen quantum yield, too. Its photodegradation reaction with the mechanism and species involved into this destruction reaction processes is discussed, too. Also, in order to maintain its photostability, TPPWCl4has been incorporated into solid substrates, such as ZnO and TiO2, and these composites were subsequently tested in the photooxidation reaction of isoamylenes (2-methyl-2-butene and 2-methyl-1-butene mixture).
Publisher
World Scientific Pub Co Pte Lt
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