"INFLUENCE OF DIELECTRIC CONSTANT ON SPECTRAL BEHAVIOUR OF COBALT - PHTHALOCYANINE" | Zendy

K. P. Srivastava | Zendy; Ashwini Kumar | Zendy

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"INFLUENCE OF DIELECTRIC CONSTANT ON SPECTRAL BEHAVIOUR OF COBALT - PHTHALOCYANINE"

Author(s) -

K. P. Srivastava,

Ashwini Kumar

Publication year - 2006

Publication title -

material science research india

Language(s) - English

Resource type - Journals

eISSN - 2394-0565

pISSN - 0973-3469

DOI - 10.13005/msri/030217

Subject(s) - dielectric , phthalocyanine , cobalt , constant (computer programming) , materials science , optoelectronics , nanotechnology , metallurgy , computer science , programming language

The Electronic absorption spectra of Co-phthalocyanine (CoPc) have been recorded with a view to study the solvent-solute interaction, H-bonding effect and its protonation in the solvents of different polarity especially in sulphuric acid of different strength. The study revealed that the CoPc acts as a weak monoacidic base in aqueous acidic solution. The hypsochromic shift of max was observed when concentration of sulphuric acid decreased from 36N to 6N suggesting the formation of H-bonding of H2S2O7 with atom N(2), N(3) and N(4) of CoPc and extra cyclic monoprotonation occurred irrespective to the concentration of H2SO4.

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