Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9769868 | Journal of Molecular Structure | 2005 | 8 Pages |
Abstract
The infrared spectra of phthalocyanine and (Mg+2, Mn+2, Fe+2, Co+2, Zn+2 and Pb+2) phthalocyanines were investigated using FTIR in the range from (4000-400Â cmâ1), as halide discs. The absorption bands of phthalocyanines were compared with the spectral data of phthalocyanine and discussed in relation to its structure. The N-H bands appearing at 3289 and 1006Â cmâ1 in phthalocyanine disappeared in the phthalocyanines. This is due to the replacement of hydrogen by the metal cation. A new band appeared at 1050Â cmâ1 in the metal phthalocyanines, which may be due to the inactive C-N vibration in phthalocyanine activated by the complex formation. Thermogravimetric (TG) analysis curves show that, the main degradation step follows first order kinetics. The minor and major decomposition temperature and also the activation energy of the main degradation step was calculated and discussed. This study focuses on the correlation existing between the structure and the continuous dark conductivity in compacted powder. The temperature dependence of the conductivity was measured in the range (283-450Â K) and hints at an activated-like behavior with activation energies depending on the structure. The conduction processes are discussed.
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Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
R. Seoudi, G.S. El-Bahy, Z.A. El Sayed,