Novel triazole substituted phthalocyanines showing high singlet oxygen quantum yields


DEMİRBAŞ Ü., Bayrak R., DİLBER G., MENTESE E. , Akcay H. T.

JOURNAL OF LUMINESCENCE, vol.206, pp.199-204, 2019 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 206
  • Publication Date: 2019
  • Doi Number: 10.1016/j.jlumin.2018.10.051
  • Title of Journal : JOURNAL OF LUMINESCENCE
  • Page Numbers: pp.199-204

Abstract

In this study, novel triazole peripherally substituted phthalocyanine zinc(II) complexes 3(a-d) were synthesized from four different phthalonitrile derivative and characterized by FT-IR NMR, MALDI-TOF, UV-Vis methods. Aggregation-concentration relations of the compounds 3(a-d) were investigated by UV-Vis spectroscopy. Fluorescence quenching properties of the phthalocyanines 3(a-d) were studied and fluorescence quantum yields were calculated by comparative method. Photodegradation quantum yields of the compound 3(a-d) were calculated. In addition, singlet oxygen quantum yields of the compounds 3(a-d) were measured by comparative method by using 1,3-diphenylisobenzofuran (DPBF) as singlet oxygen quencher. In this work, it has been observed that the synthesized novel phthalocyanines have higher quantum yield values (the range of 0.8-0.85) compared to the Zn (II) complex of unsubstituted phthalocyanine (0.67). Especially the compound 3d substituted tolyl group has the highest singlet oxygen quantum yield (0.85) seen rarely in literature.