2‐Quinolyl Benzodiazaborine: A Tunable Platform for Aggregation‐Induced Emission Luminogens via Formation of Dimeric Borate Crystals with Acid Additives

Abstract

2-Quinolyl benzodiazaborine (DAB) was synthesized and its conversion to a borate species was investigated. Addition of carboxylic acids and hydrogen fluoride led to facile formation of a stable borate derivative, whose structure was unambiguously characterized by single crystal X-ray diffraction analysis. The borates show intense aggregation-induced emission (AIE) in crystals, which is thought to be derived from a rigid dimeric structure with intermolecular hydrogen bonding.