Herein we report the multifunctional characteristics such as aggregation induced emission (AIE), triboluminescence (TL), mechanofluorochromism and temperature sensing of molecular siblings 1 (10-(dimesitylboryl)phenothiazine) and 2 (10-(bis(2,6-dimethylphenyl)boryl)phenothiazine).

Bright tunable solid state emission, intriguing mechanochromism and polymorphism dependent optical characteristics of a series of borylated aryl amines were demonstrated.

By exploiting BN/CC isosterism, aggregation induced emission enhancement (AIEE) and mechanochromic features were realised in tetra-arylaminoboranes for the first time.

Ap hotoredox-catalyst-and template-free sunlightinduced molecular dimerization of av inylpyridine-functionalized tetraarylaminoborane (TAAB) has been accomplished for the first time.T he reaction is quantitative,h ighly regioselective,a nd thermally irreversible.T he presence of the propeller-shaped TAAB framework allows selective photodimerization of one of the two vinyl pyridine units.M onomer 1 and photodimer 2 exhibit distinct photophysical properties with delayed fluorescence (DF) both in solution and the solid state,w hichw as confirmed by steady-state and time-resolved luminescence studies.Q uantum mechanical calculations were performed to support the experimental observations.Our new approach using [2+ +2] cycloaddition chemistry paves the way for the development of highly sought-after deep-blue DF materials.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Design, synthesis and characterization of a series of thiazole appended BODIPY derivatives 1-4 reported. The fluorescence emission colors of 1-4 were fine-tuned by modulating the dihedral angle between BODIPY and thiazole by judiciously varying the number of methyl substituents on both BODIPY and thiazole moieties. Compounds 1 and 2 with less number of methyl substituents on BODIPY core showed large Stokes shift (~ 110 nm) compared to the derivatives 3 and 4 with more number of methyl substituents. In addition, the optical properties of 1 and 2 are sensitive to pH of the medium. The experimentally observed results were corroborated with theoretical calculations.