Preparations and photosensitizing properties of 2,7,12,17-tetran-n- propylporphycenatotin(IV) dihalide complexes

Masatsugu Taneda, Daisuke Maeda, Hisashi Shimakoshi, Masaaki Abe, Yoshio Hisaeda

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

2,7,12,17-Tetra-n-propylporphycenatodihalotin(IV) complexes ([Sn(TPrPc)X2], X = F, Cl, and Br) were synthesized and their photophysical properties were investigated. These complexes exhibit strong absorptions in the red region (600630 nm). Strong quenching was observed during the fluorescence emission of the dibromotin(IV) complex, which is caused by an intramolecular heavy-atom effect. The complexes emit NIR phosphorescence in 1-iodopropane at room temperature and the intensity of the emission of the dibromotin(IV) complex is found to be smaller than that of the dichlorotin(IV) complex. The quantum efficiency (φδ) of generation of singlet oxygen using the dibromotin(IV) complex is the highest among the porphycenatotin(IV) complexes (φδ = 0.79). Photooxidation of 1,3-diphenylisobenzofuran catalyzed by the complexes upon irradiation with red light (over 600 nm) was studied and a rapid oxidation of the substrate was observed when using the dibromotin(IV) complex.

Original languageEnglish
Pages (from-to)667-671
Number of pages5
JournalBulletin of the Chemical Society of Japan
Volume83
Issue number6
DOIs
Publication statusPublished - 2010

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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