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Issue 36, 2012
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Photoluminescence from Bi5(GaCl4)3 molecular crystal

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Bi5(GaCl4)3 sample has been synthesized through the oxidation of Bi metal by gallium chloride (GaCl3) salt. Powder X-ray diffraction as well as micro-Raman scattering results revealed that, in addition to crystalline Bi5(GaCl4)3 in the product, an amorphous phase containing [GaCl4] and [Ga2Cl7] units also exists. The thorough comparison of steady-state and time-resolved photoluminescent behaviors between the Bi5(GaCl4)3 product and Bi5(AlCl4)3 crystal leads us to conclude that Bi53+ is the dominant emitter in the product, which gives rise to the ultrabroad emission ranging from 1 to 2.7 μm. Detailed quantum chemistry calculation helps us assign the observed excitations to some electronic transitions of the Bi53+ polycation, especially at shorter wavelengths. It is believed that our work shown here is not only helpful to solve the confusions on the luminescent origin of bismuth in other material systems, but also serves to develop novel broadband tunable laser materials.

Graphical abstract: Photoluminescence from Bi5(GaCl4)3 molecular crystal

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Publication details

The article was received on 31 May 2012, accepted on 11 Jul 2012 and first published on 11 Jul 2012

Article type: Paper
DOI: 10.1039/C2DT31167D
Citation: Dalton Trans., 2012,41, 11055-11061

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    Photoluminescence from Bi5(GaCl4)3 molecular crystal

    H. Sun, B. Xu, T. Yonezawa, Y. Sakka, N. Shirahata, M. Fujii, J. Qiu and H. Gao, Dalton Trans., 2012, 41, 11055
    DOI: 10.1039/C2DT31167D

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