Olaf Rüdiger Dr. rer. nat. Hild

Synthesis and electropolymerisation of pyrrol-1-yl substituted phthalocyanines

2,9,16,23-Tetrakis(2-pyrrol-1-ylalkoxy)phthalocyanines, in which the phthalocyanine is connected via an alkylene spacer to a pyrrole substituent, are prepared via three steps in good yields. For the first time monomers with groups for electropolymerisation electronically isolated from the phthalocyanine are described. Films of thickness up to 5 µm of these pyrrole substituted phthalocyanines were obtained by oxidative electropolymerisation under potentiodynamic conditions or at constant potential. UV/Vis spectra show the presence of phthalocyanine and polypyrrole structural units in the polymers. The charge–discharge behaviour is accompanied by a reversible electrochromic colour change. The polymer films exhibit specific electrical conductivities of ∼10−5 S cm−1.

Conjugated Polymeric phthalocyanines by polycyclotetramerization and electropolymerization

Polymeric phthalocyanines are prepared by polycyclotetramerization of tetracarbonitriles and electropolymerization of amino- or pyrrole-substituted phthalocyanines. The conjugated polymers are characterized by a long wavelength absorption and a high electrical conductivity.