Design and Synthesis of Boron-containing Functional π-Electron Materials

Abstract

Utilization of boron, a group 13 element, as a key element for developing new functional electronic and optoelectronic materials is an important direction in the organoboron chemistry. Boron has several characteristic features, such as trigonal planar geometry for trivalent boron compounds, high Lewis acidity, and effective orbital interaction with π-conjugated frameworks through the vacant p-orbital (i.e., ρ_π-π^* conjugation). Exploiting these features of the boron element for molecular designs allows us to create sophisticated π-electron materials having attractive photophysical and electronic properties. We here present some progress in our chemistry, including B, B', B"-trianthrylborazine (B₃N₃)-based molecular bundles, boryl-substituted thienylthiazole π-electron systems with intramolecular B-N coordination, borole- and dibenzoborole-based π-conjugated compounds, and boryl-substituted emissive organic solids.