title: Novel homo- and heterobinuclear ball-type phthalocyanines: synthesis and electrochemical, electrical, EPR and MCD spectral properties.
abstract: The mononuclear Fe(II) phthalocyanine 2 and ball-type homobinuclear Fe(II)-Fe(II) and Cu(II)-Cu(II) phthalocyanines, 3 and 4 respectively, were synthesized from the corresponding 4,4'-[1,1'-methylenebis-(naphthalene-2,1-diyl)]bis(oxy)diphthalonitrile 1, and then ball-type heterobinuclear Fe(II)-Cu(II) phthalocyanine 5 was synthesized from 2. The novel compounds 4 and 5 have been characterized by elemental analysis, UV/vis, IR and MALDI-TOF mass spectroscopies. Electron paramagnetic resonance and magnetic circular dichroism measurements of 3, 4 and 5 were also examined. The voltammetric measurements of the complexes showed the formation of various electrochemically stable ligand- and metal-based mixed-valence species, due to the intramolecular interactions between the two MPc units, especially in ball-type binuclear iron(II) phthalocyanine. Impedance spectroscopy and d.c. conductivity measurements of 4 and 5 were performed as a function of temperature (295-523 K) and frequency (40-10(5) Hz). While room temperature impedance spectra consist of a curved line, a transformation into a full semicircle with increasing temperature was observed for both compounds.
authors.affiliation: Department of Chemistry, Marmara University, 34722, Istanbul, Turkey. zodabas@marmara.edu.tr
authors.forename: Zafer
authors.initials: Z
authors.lastname: Odabaş
authors.forename: Fatih
authors.initials: F
authors.lastname: Dumludağ
authors.forename: Ali Riza
authors.initials: AR
authors.lastname: Ozkaya
authors.forename: Seigo
authors.initials: S
authors.lastname: Yamauchi
authors.forename: Nagao
authors.initials: N
authors.lastname: Kobayashi
authors.forename: Ozer
authors.initials: O
authors.lastname: Bekaroğlu