Two seven-membered N,N-chelated organoboron complexes were synthesized. A small structural change led to a significant difference in molecular geometry—one was saddle-shaped, the other approximately planar. This change strongly impacted their optical properties; the planar complex had red-shifted absorption and emisson but a much lower fluorescence quantum yield.
L. Tian, Y. Cao, C. Chen, Z. Ni, C. Fan, J. Mack, P. Dai, H. Lu and L. Gai, Chem. Commun., 2025, 61, 18641 DOI: 10.1039/D5CC05461C
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