Synthesis and electrochemistry of tetrakis(7-coumarinthio-4-methyl)-phthalocyanines,and preparation of their cinnamic acid and sodium cinnamate derivatives |
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Authors: | Aliye Asl? Esenp?nar Ali R?za ÖzkayaMustafa Bulut |
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Institution: | Marmara University, Department of Chemistry, Faculty of Art and Science, 34722 Goztepe, Istanbul, Turkey |
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Abstract: | Novel water soluble free-base, Zn(II) and Co(II) metallo phthalocyanines with four cinnamic acid moieties were prepared from the corresponding tetrakis(7-coumarinthio-4-methyl)-phthalocyanine by the lactone ring opening reaction. The new compounds were purified and characterized by elemental analysis, 1H NMR, Maldi-TOF, FT-IR and UV–Vis spectral data. Cyclic and differential pulse voltammetry and in situ spectroelectrochemistry of the 2,9,16,23-tetrakis(7-coumarinthio-4-methyl) substituted free-base 1a, Zn(II) 1b and Co(II) 1c phthalocyanines, employed as the starting compounds have been studied. This allowed us not only to identify metal- and phthalocyanine ring-based redox processes of the complexes, but also the effect of aggregation on these processes. |
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Keywords: | Phthalocyanines Cinnamic acid Coumarin (2H-1-benzopyran-2-one) Cobalt Zinc Spectroelectrochemistry |
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