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Double Fluorescence Conversion in Ultraviolet and Visible Region for Some Praseodymium Complexes of Aromatic Carboxyates

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Abstract

Four praseodymium complexes of aromatic carboxylates (benzoate, 4-tert-butylbenzoate, 2-benzoylbe-noate, and benzimidazole-5-carboxylate) have been synthesized and characterized, whose photophysical properties have been studied with ultraviolet spectra, phosphorescence spectra, and fluorescence spectra. The fluorescent emission spectra of all praseodymium complexes show two emission peaks under the excitation band of 245 nm at about 395 and 595 nm respectively, while one peak under 415 nm at about 595 nm, which attributed to be 1S0 → 1I6 (395 nm) transition and the characteristic emission 1D2 → 3H4 (595 nm) transition of Pr3+ ion. The 1S0 → 1I6 transition can be ascribed as the transition of charge transfer state, and the 1D2 → 3H4 can be further proved that there exists an antenna effect in the fluorescence of praseodymium with aromatic carboxylic acids. In conclusion, the praseodymium complexes systems can realize the double fluorescent conversion in both ultraviolet and visible region and can be further studied the application of this conversion.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (20301013).

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  1. Department of Chemistry, Tongji University, Shanghai, 200092, People’s Republic of China

    Bing Yan, Wei-Jing Wang & Yi-Shan Song

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  1. Bing Yan
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  2. Wei-Jing Wang
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  3. Yi-Shan Song
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Correspondence to Bing Yan.

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Yan, B., Wang, WJ. & Song, YS. Double Fluorescence Conversion in Ultraviolet and Visible Region for Some Praseodymium Complexes of Aromatic Carboxyates. J Fluoresc 16, 495–500 (2006). https://doi.org/10.1007/s10895-006-0083-y

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