Approaching the structure of REBaB9O16 (RE = rare earth) by characterization of a new analogue Ba6Bi9B79O138

Rihong Cong; Zhengyang Zhou; Qiaoqi Li; Junliang Sun; Jianhua Lin; Tao Yang

doi:10.1039/C5TC00560D

Approaching the structure of REBaB₉O₁₆ (RE = rare earth) by characterization of a new analogue Ba₆Bi₉B₇₉O₁₃₈†

Rihong Cong,*^a Zhengyang Zhou,^ab Qiaoqi Li,^a Junliang Sun,^b Jianhua Lin^b and Tao Yang*^a

* Corresponding authors

^a College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, People's Republic of China
E-mail: congrihong@cqu.edu.cn, taoyang@cqu.edu.cn
Tel: +86-23-65105065

^b Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic of China

Abstract

Understanding structure–property relationships are key to the rational design of superior materials. The series of well-known photoluminescent hosts with the chemical formula REBaB₉O₁₆ (RE = La–Lu, Y) have been extensively studied but no structural details have been reported. We prepared a new analogue Ba₆Bi₉B₇₉O₁₃₈ (BBBO) and proved the isomorphism by X-ray diffraction studies, in spite of the fact that they possess different cationic compositions. In addition, we successfully prepared complete solid solutions of Ba₆(Bi_1−xEu_x)₉B₇₉O₁₃₈ (0 ≤ x ≤ 1). Single crystal XRD characterizations on a suitable crystal of BBBO indicated an ordered structure model with the noncentrosymmetric space group R3. It possesses a layered-type structure composed of BO₄–BiO₆–BO₄ sandwiched layers and polyborate inter-layer groups. Ba²⁺ atoms are located in the inter-layer cavities. There are three and two independent Bi and Ba atoms, respectively. In other words, we have taken a step forward in understanding the structure of REBaB₉O₁₆ by analysing a new analogue. We believe this will help the further interpretation and development of REBaB₉O₁₆-based optical materials.

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Article information

DOI: https://doi.org/10.1039/C5TC00560D
Article type: Paper
Submitted: 28 Feb 2015
Accepted: 22 Mar 2015
First published: 24 Mar 2015

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J. Mater. Chem. C, 2015,3, 4431-4437

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Approaching the structure of REBaB₉O₁₆ (RE = rare earth) by characterization of a new analogue Ba₆Bi₉B₇₉O₁₃₈

R. Cong, Z. Zhou, Q. Li, J. Sun, J. Lin and T. Yang, J. Mater. Chem. C, 2015, 3, 4431 DOI: 10.1039/C5TC00560D

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Journal of Materials Chemistry C