Improved methods for the synthesis of BH and a series of -heterocycle-coordinated BH complexes (-Het·BH) have been developed with readily obtained KBH as the starting material. Oxidation of KBH could provide BH in over 90% yield. Then, the -Het·BH complexes were prepared from the as-synthesized BH through in situ multistep reactions by reacting with NaH, -heterocycles, and dilute hydrochloric acid. Among these -Het·BH complexes, 4-(triphenylvinyl)pyridine-coordinated BH () exhibits a significant aggregation-induced emission (AIE) effect in a THF/HO mixed solution, and 8-aminoisoquinoline-coordinated BH () exhibits a positive solvatochromism phenomenon. These improved methods provide new approaches to synthesizing BH and -Het·BH complexes with potential applications in luminescent materials.
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