Cs6RE2(PO4)4 (RE = Y and Gd): two new members of the alkali rare-earth double phosphates

Ying Wang; Zhipeng Lian; Xin Su; Zhihua Yang; Shilie Pan; Qingfeng Yan; Fangfang Zhang

doi:10.1039/C5NJ00109A

Cs₆RE₂(PO₄)₄ (RE = Y and Gd): two new members of the alkali rare-earth double phosphates†

Ying Wang,‡^ab Zhipeng Lian,‡^c Xin Su,^ab Zhihua Yang,^a Shilie Pan,*^a Qingfeng Yan^c and Fangfang Zhang^a

* Corresponding authors

^a Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Technical Institute of Physics & Chemistry of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China
E-mail: slpan@ms.xjb.ac.cn
Fax: +86-991-3838957
Tel: +86-991-3674558

^b University of Chinese Academy of Sciences, Beijing 100049, China

^c Department of Chemistry, Tsinghua University, Beijing 100084, China

Abstract

Two new alkali rare-earth double phosphates, Cs₆Y₂(PO₄)₄ (CYP) and Cs₆Gd₂(PO₄)₄ (CGP), have been successfully synthesized using the conventional solid-state reaction method. The two compounds crystallize in the same space group, P2₁ (no. 4), and feature a three-dimensional network composed of CsO_n (n = 8, 10 and 11) distorted polyhedra and isolated YO₆ and PO₄ groups. IR spectroscopy, UV-vis-NIR diffuse reflectance spectroscopy, and electronic band structures of the two compounds are reported. In addition, the Ce³⁺-doped CYP and CGP phosphors were synthesized and their photoluminescence properties were investigated. The results indicate that the CYP:Ce³⁺ and CGP:Ce³⁺ phosphors can be efficiently excited by ultraviolet (UV) light to realize a blue luminescence corresponding to the electric-dipole allowed 4f–5d transition of the Ce³⁺ ions.

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Article information

DOI: https://doi.org/10.1039/C5NJ00109A
Article type: Paper
Submitted: 14 Jan 2015
Accepted: 17 Mar 2015
First published: 17 Mar 2015

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New J. Chem., 2015,39, 4328-4333

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Cs₆RE₂(PO₄)₄ (RE = Y and Gd): two new members of the alkali rare-earth double phosphates

Y. Wang, Z. Lian, X. Su, Z. Yang, S. Pan, Q. Yan and F. Zhang, New J. Chem., 2015, 39, 4328 DOI: 10.1039/C5NJ00109A

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