Synthesis of diborane compounds reveals how aryl substituents affect their light-emitting properties.
Tetra(1-naphthyl)diborane 2 was synthesized, and its photophysical properties were compared with those of tetra(o-tolyl)diborane 1. Compound 2 exhibited dual emission at room temperature, whereas 1 showed dual emission only at low temperature, suggesting that aryl substituents influence B–B bond rotation in the excited state. Reaction of 2 with benzyl azide afforded the 1-naphthyl-substituted boron-bridged hexazene (B2N6) derivative 4, which showed similar absorption/emission spectra to those of the o-tolyl derivative 3, but the molecular orbital based on the N6 π-system in 4 was observed in a deeper energy level.
No takes yet. Share an insight, caveat, or question.
Tanizawa et al. (2026) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: