Abstract
Luminescence from solids such as crystals and aggregates is of growing academic and industrial interest. In this study, we report decomposition of the unpolarized fluorescence spectrum of uniaxially oriented 1,3,5-triphenylbenzene (TPB) microcrystals into four polarized spectra measured with polarizer (V: vertical and H: horizontal) and analyser (V: vertical and H: horizontal), where V and H indicate perpendicular and parallel to the layer of TPB molecules in the crystal, respectively. Resolved spectra were interpreted in terms of the molecular and excimer like (J- and H-dimer) emissions. The origin of the excimer like emissions was discussed in relation to the molecular packing in the crystal. It was shown that polarized crystal fluorescence can provide insight into the excitation/emission process in the crystal. Although preliminary, this study demonstrates the potential of polarized fluorescence to elucidate the luminescent mechanism.
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All data analyzed in this study are included in this paper and raw data are available to the corresponding author upon reasonable request.
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This work was supported by the Kanaigakuen Wakate Kenkyu, for which the authors express their heartfelt gratitude.
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Michihiro Hara contributed to the data collection. Experimental was done by Michihiro Hara. Tsunehisa Kimura and Tatsuya Takeshita participated in data analysis. Hiroyuki Kurata contributed to providing helpful information and suggestion of the compounds. All authors contributed to the results discussions. The manuscript was written and revised by all authors. All authors read and approved the final manuscript.
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Hara, M., Takeshita, T., Kurata, H. et al. Decomposition of Unpolarized Fluorescence Spectrum of Uniaxially Oriented 1,3,5-Triphenylbenzene Microcrystals Into Polarized Fluorescence Spectra. J Fluoresc 33, 1559–1563 (2023). https://doi.org/10.1007/s10895-023-03163-w
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DOI: https://doi.org/10.1007/s10895-023-03163-w