Abstract
Solid-state absorption spectra of the title compound have been investigated in an effort to define the contribution of intermolecular interactions to the bathochromic shift associated with crystallization. In this regard, the bathochromic shift observed upon changing from the solution to the solid state was found to be relatively small in comparison to that observed with a closely related analogue. Studies involving the temperature dependence of the absorption spectra of evaporated thin films revealed that intermolecular interactions in the crystalline state had very little affect on the excited state properties of this dye. This probably accounts for the small bathochromic shift upon crystallization.
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