Synthesis and spectroelectrochemistry of new phthalocyanines with ester functionalities


Sevim A. M. , Arikan S., KOCA A. , Gül A.

DYES AND PIGMENTS, cilt.92, ss.1114-1121, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 92 Konu: 3
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.dyepig.2011.07.015
  • Dergi Adı: DYES AND PIGMENTS
  • Sayfa Sayıları: ss.1114-1121

Özet

Metal-free (H(2)Pc) 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, H(2)Pc 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. (C) 2011 Elsevier Ltd. All rights reserved.