The effects of substituents' positions and variety of axial groups on the photochemical properties of coumarin substituted indium(III) phthalocyanines

•Synthesis of 7-oxy-3-(3′,4′,5′-trimethoxyphenyl)coumarin bearing In(III) phthalocyanines.•Spectral properties of the new indium(III) phthalocyanines are reported.•The photochemical properties of these compounds are also investigated.

The synthesis of 7-oxy-3-(3,4,5-trimethoxyphenyl)coumarin tetra-substituted indium(III) phthalocyanine complexes have been performed for the first time in this study. The new compounds were characterized by IR, 1H NMR, electronic spectroscopy and mass spectra. The photochemical properties such as singlet oxygen generation and photostability were investigated in dimethylsulfoxide (DMSO) solutions. The effects of the positions (peripheral or non-peripheral) of substituents on the phthalocyanine framework and variety (chlorine or acetate) of axial groups on the central indium(III)metal ion on these properties were also compared in this study.

Graphical abstractThe photochemical properties of novel 7-oxy-3-(3,4,5-trimethoxyphenyl)coumarin) substituted indium(III) phthalocyanines were investigated in dimethylsulfoxide (DMSO) solutions. The effects of the positions (peripheral or non-peripheral) of substituents and variety (chlorine or acetate) of axial groups on the central indium(III)metal ion on these properties were also compared in this study.Figure optionsDownload full-size imageDownload as PowerPoint slide