ABSTRACT A library of novel phenylpyridine‐based boron C , N ‐chelates bearing a mesogenic unit was synthesized and investigated to clarify how the chain type, length, and number, as well as the boron substitution (BH 2 vs. BMe 2 ) influence the mesomorphic and photophysical behavior. All BH 2 derivatives exhibited SmA or N phases even with short alkyl chains, whereas BMe 2 analogues remained nonmesomorphic unless a semi‐perfluorinated chain was introduced, demonstrating the strong influence of boron substitution on mesophase formation. All compounds displayed intense blue emission in solution, with spectral properties primarily determined by the boron C , N core and only minor shifts induced by variation in the mesogenic unit in agreement with complementary DFT calculations. Quantum yields reached up to 100% in solution. These results demonstrate that mesomorphic behavior can be introduced and tuned while preserving the excellent photophysical performance of the boron‐ C , N ‐chelate system.
Müller et al. (Wed,) studied this question.