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RESEARCH PRODUCT

Molecular balance forms of indium phthalocyanines in benzene and pyridine solution

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Abstract The electronic absorption spectra of In2Pc3, InPc2 and InPcI solid compounds after dissolvation in one of the most commonly used solvents, i.e.: benzene and pyridine have been measured. In benzene, the molecules of the diindium tripledecker phthalocyanine, In2Pc3, undergoes transformation to ionic couples [InPc]+[InPc2]-, whereas when the InPc2 compound is dissolvated, the molecules of the indium sandwiches, InPc2, remain relatively stable in the solvent. When the In2Pc3 compound is dissolvated in py, the inner Pc(2-) ring of diindium tripledecker phthalocyanine molecule undergoes disjunction and rejection. In the results of it in the solution the couple of chromophores, being in the dynamical balance ([InPc(2-)])2 ↔ 2 InPc(3-), is formed. When the InPc2 compound is dissolved in py, the Pc(⋅-) rings of the compound molecules undergo disjunction and rejection, what leads to formation three different chromophores in solution i.e.: In2Pc3 and (InPc(2-))2 ↔ 2InPc(⋅3-) couple. Spectra for InPcI compound, are taken for comparison, at benzene and at py, show no changes of the chromophore. The molecular mechanisms of the transformations of the In2Pc3 and InPc2 compounds in solutions are proposed and discussed.