NDLI: A series of novel rare-earth bismuth tungstate compounds $LnBiW_{2}O_{9}$ (Ln = Ce, Sm, Eu, Er): Synthesis, crystal structure, optical and electronic properties

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zhang, Wei-long Luo, Zhong-zhen Li, Ye-yu Cheng, Wen-dan Geng, Lei Zhang, Hao Chai, Guo-liang He, Zhang-zhen Lin, Chen-sheng
Description	Author Affiliation: Li YY ( State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, People's Republic of China.)
Abstract	The structural, optical, and electronic properties of four rare-earth bismuth tungstate compounds, $LnBiW_{2}O_{9}$ (Ln = Ce, Sm, Eu, Er), have been investigated by means of single-crystal X-ray diffraction , elemental analyses, and spectral measurements. For some of the compounds, the calculations of energy band structures and density of states have also been made by the density functional theory. The structure of $CeBiW_{2}O_{9}$ features a three-dimensional $(BiW_{2}O_{9})^{3−}$ anionic framework with interesting channels where Ce atoms are located. The framework is constructed by one-dimensional $BiO_{9}$ polyhedra chains and one-dimensional zigzag $W_{2}O_{9}$ chains via edge- and face-sharing. $LnBiW_{2}O_{9}$ (Ln = Sm, Eu, Er) are isostructural and their structures feature a three-dimensional network based on alternating $(BiO_{2})^{−}$ layers and $(Ln_{2}W_{2}O_{12})^{6−}$ layers connected by corner-linked chains of $WO_{6}$ octahedra. Results of spectral measurements indicate that $EuBiW_{2}O_{9}$ exhibit the characteristic yellow–red light emission under excitation at 395 nm, and it will be a red phosphor in designing white light-emitting diode device. The calculated results of band structures by using the density functional theory (DFT) show that the solid-state compound $CeBiW_{2}O_{9}$ and $SmBiW_{2}O_{9}$ are indirect band gap materials.
ISSN	14779226
Issue Number	28
Journal	Dalton Trans.
Volume Number	40
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2011-07-28
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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