164–166 The most intense vibrational band observed in MPcs is around 1500 cm −1 which exhibits a clear sensitivity to changes in the central metal with a definite trend correlating metal size to shifts in vibration. 159–161,163,164 Bands in this region correspond to the displacement of the C α –N β –C α bridges between isoindole groups in the MPc macrocycle ( Fig. 15i ). 159–161,163,164 The change in wavenumber of this band observed in different MPcs correlates to
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Metal phthalocyanines: thin-film formation, microstructure, and physical properties.
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