Synthesis,characterization, and electrochemical and electrical properties of novel mononuclear and binuclear ball-type Zn(II) and Co(II) phthalocyanines substituted with 1a,8b-dihydronaphtho[b]naphthofuro-[3,2-d]furan-7,10-diyl |
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Authors: | Zafer Odabaş Ahmet Altındal Ali Rıza Özkaya Mustafa Bulut Bekir Salih Özer Bekaroğlu |
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Institution: | 1. Department of Chemistry, Marmara University, Faculty of Science and Letters, 34722, Göztepe, Istanbul, Turkey;2. Department of Physics, Marmara University, Faculty of Science and Letters, 34722, Göztepe, Istanbul, Turkey;3. Department of Chemistry, Hacettepe University, 06532 Ankara, Turkey;4. Department of Chemistry, Technical University of ?stanbul, Maslak-?stanbul, Turkey |
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Abstract: | New mononuclear phthalocyanines Zn(II) 4 and Co(II) 6] and ball-type bisphthalocyanines Zn(II) 5 and Co(II) 7] have been synthesized from the corresponding compound 3, which can be obtained from the reaction of 4-nitrophthalonitrile 1 with 1a,8b-dihydronaphthob]naphthofuro3,2-d]furan-7,10-diol 2. The novel compounds have been characterized by elemental analysis, UV/Vis, IR, 1H NMR and MASS spectroscopy. The electrochemical measurements show the formation of various mixed-valence oxidized and reduced species, due to intramolecular interactions between the two phthalocyanine units in the ball-type binuclear metallophthalocyanines. Detailed studies of the effect of temperature on the electronic properties of the films were investigated by dc conductivity and impedance spectroscopy techniques at temperatures between 290 K and 460 K. Thermally activated conductivity dependence on temperature was observed from the dc measurements. The ac results give a power law behavior in which the frequency exponent decreases with temperature. It was observed that the impedance spectra consist of a curved line at low temperature. These curved lines transform into a full semicircle with increasing temperature. |
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Keywords: | Ball-type Mononuclear Bisphthalocyanine Synthesis Electrochemistry Electrical conductivity |
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