Document Type: Original Article

Authors

Department of Chemistry, Federal University of Petroleum Resources, P.M.B 1221, Effurun, Delta State, Nigeria

10.33945/SAMI/CHEMM.2019.6.6

Abstract

This article presents a semi-empirical determination of ground state dipole moment (mg) and excited state dipole moment (me) of 2(3)-tetra(tert-butylphenoxy)phthalocyaninato zinc(II) (ZnTBPc) using the solvatochromic shift method, which is based on the Onsager’s reaction field theory. A combined application of the Bakshiev’s equation and the Kawski-Chamma-Viallet’s equation was used to determine the ratio me/mg while the use of the molecular-microscopic solvent polarity parameter yielded the term Dm (me- mg). The dipole moment of ZnTBPc in its excited singlet state (me=4.46D) is more than twice as much as that in its ground state (mg=2.14D).These values suggest that the higher charge separation is greater in the excited state of ZnTBPc than in its ground state.

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