UV–visible spectral study on the stability of lead phthalocyanine complexes

Mohan Kumar, T. M. and Achar, B. N. (2006) UV–visible spectral study on the stability of lead phthalocyanine complexes. Journal of Physics and Chemistry of Solids, 67 (11). 2282 - 2288. ISSN 0022-3697

Full text not available from this repository. (Request a copy)
Official URL: https://doi.org/10.1016/j.jpcs.2006.05.005


UV–visible electronic spectral study has been done on lead phthalocyanine (PbPc), lead tetranitro phthalocyanine (PbTNP) and lead tetraamino phthalocyanine (PbTAP) in dimethyl sulphoxide (DMSO) and H2SO4 media. Metal free phthalocyanine (H2Pc) is insoluble in DMSO and soluble in conc. H2SO4. The study has been extended to H2Pc to compare the stability of phthalocyanine structure with the PbPc complexes in H2SO4 medium. PbPc complexes are stable in DMSO, and all the complexes are more stable in 36N H2SO4 than in 30N and 28N H2SO4 media. Further, complete demetallation and degradation of the phthalocyanine structure have been observed for all the PbPc complexes in 36N H2SO4 medium within a week's time. The stability of these complexes is compared with H2Pc in H2SO4 medium. The decomposition reactions in H2SO4 media for H2Pc, PbPc, PbTNP and PbTAP are followed spectrophotometrically and rate constants were calculated. The decomposition reactions were found to follow the first-order kinetics with respect to the concentration of their respective phthalocyanine derivatives.

Item Type: Article
Uncontrolled Keywords: Organometallic compounds
Subjects: C Chemical Science > Chemistry
Divisions: Department of > Chemistry
Depositing User: LA manjunath user
Date Deposited: 12 Aug 2019 07:21
Last Modified: 07 Jul 2022 05:59
URI: http://eprints.uni-mysore.ac.in/id/eprint/6275

Actions (login required)

View Item View Item