Synthesis and spectroelectrochemistry of new phthalocyanines with ester functionalities |
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Authors: | Altu? Mert SevimSibel Ar?kan,At?f KocaAhmet Gü l |
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Affiliation: | a Department of Chemistry, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey b Department of Chemical Engineering, Faculty of Engineering, Marmara University, 34722 Göztepe, Istanbul, Turkey |
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Abstract: | Metal-free (H2Pc) and metallophthalocyanines (MPc; M: Co, Zn) with four n-pentyl ester of thioglycolic acid groups have been synthesized by the esterification of the corresponding carboxylic acid derivatives with n-pentanol. The novel phthalocyanine compounds were characterized by elemental analyses, mass, FT-IR and UV-Vis spectral data. The aggregation investigations carried out in different concentrations and solvents indicate that ester substituted metal-free and metallo-phthalocyanine compounds have not shown any aggregation behavior in the concentration range of about 10−5 M. Electrochemical and in-situ spectroelectrochemical measurements give common MPc based redox behaviors which supported the proposed structure of the complexes. While CoPc gives both metal-based and ring-based redox processes, H2Pc and ZnPc give only ring-based electron transfer processes. In-situ electrocolorimetric method was applied to investigate the color of the electro-generated anionic and cationic forms of the complexes. |
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Keywords: | Phthalocyanine Esterification Electrochemistry Spectroelectrochemistry Electrocolorimetry DCC |
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