Abstract

In this article, a phenothiazine-functionalized mono-β-diketonate difluoroboron complex (PTZB) and a phenothiazine-functionalized bis-β-diketonate difluoroboron complex (DPTZB) were successfully synthesized and characterized by NMR and high-resolution mass spectrometry, and the structure of the phenothiazine-functionalized mono-β-diketonate difluoroboron complex (PTZB) was furtherly confirmed by single crystal X-ray diffraction. Their photophysical and electrochemical properties and thermal stability were systematically investigated by combining experiment and theoretical calculations. Both the complexes were found to exhibit high thermal stabilities with decomposition temperatures over 350 °C. The mono-β-diketonate difluoroboron complex (PTZB) exhibits strong red emission in toluene, while it shows weak emission in other common organic solvents. The bis-β-diketonate difluoroboron complex (DPTZB) exhibits weak emission in common organic solvents. Moreover, the mono-β-diketonate difluoroboron complex (PTZB) exhibits obvious aggregation-induced emission enhancement (AIEE) in toluene/n-hexane mixture.

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