Photoluminescence properties of new BF2 complexes with pyrazolone ligands: Dependence on volume and electronic effect of substituents |
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| Authors: | Hui-hui Zhang Wei Dou |
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| Institution: | a College of Chemistry and Chemical Engineering and State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
b State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China |
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| Abstract: | Novel fluorine-boron complexes with donor-acceptor architecture in which pyrazoline-1,3-diones were chosen as electron donors have been synthesized and well characterized. Correlation of the luminescence properties of the complex 2c and its crystal structures was discussed. Well-ordered molecular packing in the crystal results in strong charge transfer interactions characterized by long excited-state lifetime. These fluorine-boron complexes show photophysical properties highly dependent on the solvent polarity and aggregation states. The substituents on the pyrazoline were found to have a significant impact on the solid-state luminescent properties. As a result, some significant differences in charge transfer modes were observed in the solid state among these complexes. |
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| Keywords: | Photoluminescence properties Donor-acceptor architecture Pyzarolone BF2 complexes Charge transfer Crystal structure |
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