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Characterization and studies of electroactive properties of an organometallic polymer of iron‐phthalocyanine
Author(s) -
Nalwa Hari S
Publication year - 1988
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.590020309
Subject(s) - phthalocyanine , chemistry , dielectric , delocalized electron , pyroelectricity , polymer , analytical chemistry (journal) , polymerization , permittivity , ferroelectricity , materials science , organic chemistry , optoelectronics
An iron‐phthalocyanine polymer has been characterized by infrared spectroscopy, X‐ray diffraction and Mössbauer spectroscopy. The electrical properties of resistivity, dielectric constant and the thermally stimulated depolarization effect have been investigated in the temperature range 30–240°C. The depolarization of thermoelectret shows two current peaks at about 176°C and 200°C. The unpolarized sample also displays a pyroelectric current on heating, indicating the possibility of ferroelectric polarization. A temperature‐dependent measurement of the dielectric constant exhibits a dielectric maximum around 180°C which is likely due to electret current peaks. The results have been compared with a monomer of iron‐phthalocyanine and interpretations are made in terms of the highly delocalized π‐electron system of the phthalocyanine macrocycle being further extended by polymerization.