Synthesis and photophysical behaviour of tantalum and titanium phthalocyanines in the presence of gold nanoparticles: Photocatalysis towards the oxidation of cyclohexene

Chauke V. P., Arslanoglu Y., NYOKONG T.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, cilt.221, sa.1, ss.38-46, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 221 Sayı: 1
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.jphotochem.2011.04.020
  • Dergi Adı: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.38-46
  • Anahtar Kelimeler: Tantalum, Titanium, Phthalocyanines, Gold nanoparticles, Singlet oxygen quantum yield, Photocatalysis, Photodegradation, Triplet quantum yields, Triplet lifetimes, Cyclohexene, COMPLEXES, NANOCRYSTALS, SPECTROSCOPY, DERIVATIVES, PORPHYRIN, SINGLET, OXYGEN
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

We report on the synthesis of 2,(3)- (peripheral) and 1,(4)- (non-peripheral) (2-mercaptopyridine)phthalocyanine complexes of titanium (IV) oxide (5 and 6 respectively), and tantalum (III) hydroxide (7, peripheral only), their photochemical and photophysical parameters and the photocatalytic oxidation of cyclohexene in the presence of gold nanoparticles (AuNPs). The singlet oxygen quantum yield values increased in the presence of AuNPs, for complexes 5 and 6. The percentage conversion values for cyclohexene using 5, 6 and 7 were 27%, 20% and 14%, respectively. These values increased considerably in the presence of AuNPs, except complex for 7. The products obtained include cyclohexene oxide, 2-cyclohexen-1-ol, 2-cyclohexene-1-one and 1,2-cyclohexanediol. Low values of singlet oxygen quantum yields favour the formation of 1,2-cyclohexanediol. (C) 2011 Elsevier B.V. All rights reserved.