Abstract
AbstractHalogenated and non‐halogenated boron complexes bearing pyrrole and π‐expanded pyridine structures, such as quinoline (for 1 a‐H, 1 a‐Cl, 1 a‐Br, and 1 a‐I), isoquinoline (for 1 b‐Br), and phenanthridine (for 1 c‐Br), were prepared to investigate their optical properties. Fluorescence studies of the different solid states revealed that the boron complexes 1 a‐H, 1 a‐Cl, and 1 a‐Br exhibit the mechanochromic properties. The present paper also examined the optical properties of other analogs 1 a‐I, 1 b‐Br, and 1 c‐Br both in‐solution and solid state. Moreover, the interrelationship between their emission character, molecule structures, and solid state were studied by X‐ray crystallographic analysis and X‐ray diffraction investigation.
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