Fluorescence Properties of Diaroylmethanatoboron Difluorides in the Solid State

Abstract

We investigated fluorescence properties of diaroylmethanatoboron difluorides in the solid state. As a result, it is suggested that the fluorescent domains in the solid state are not only excited monomer but also excimer and "multimolecular excited complex". Moreover, it is found that intermolecular interactions in the solid state depend on the bulkiness of substituent on phenyl groups. Thus, it was indicated that the steric substituent effects control a major fluorescent domain in the solid state. In addition, we will discuss fluorescence mechanochromism in the solid state.