RE(H2C3N3O3)2·(OH)·xH2O (RE = La, Y and Gd): potential UV birefringent materials with strong optical anisotropy originating from the (H2C3N3O3)− group

Xia Hao; Min Luo; Chensheng Lin; Donghong Lin; Liling Cao; Ning Ye

doi:10.1039/C9DT02512J

RE(H₂C₃N₃O₃)₂·(OH)·xH₂O (RE = La, Y and Gd): potential UV birefringent materials with strong optical anisotropy originating from the (H₂C₃N₃O₃)⁻ group†

Xia Hao,^abc Min Luo,*^a Chensheng Lin,

^a Donghong Lin,^ac Liling Cao^ac and Ning Ye

*^a

Author affiliations

* Corresponding authors

^a Key Laboratory of Optoelectronic Materials Chemistry and Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
E-mail: lm8901@fjirsm.ac.cn, nye@fjirsm.ac.cn

^b School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China

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

Abstract

A new series of dihydro-isocyanurates, namely, RE(H₂C₃N₃O₃)₂·(OH)·xH₂O (RE = La, Y and Gd) was readily obtained by a mild hydrothermal technique using lithium hydroxide as a deprotonation agent. La(H₂C₃N₃O₃)₂·OH·2H₂O and Re(H₂C₃N₃O₃)₂·OH·5H₂O (Re = Y, Gd) crystallized in the centrosymmetric (CS) space groups P2₁/c and P [1 with combining macron] , respectively. Their intricate 3D frameworks were built by cationic polyhedrons (LaO₈N/ReO₈) and (H₂C₃N₃O₃)⁻ groups. The experiments and theoretical studies demonstrated that these compounds possessed short ultraviolet cut-off edges (≤240 nm) and large birefringences (Δn ≥ 0.257@546.1 nm). In addition, the theoretical studies further revealed that the (H₂C₃N₃O₃)²⁻ group plays a pivotal role in strengthening the optical anisotropy for all compounds.

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Article information

DOI: https://doi.org/10.1039/C9DT02512J
Article type: Paper
Submitted: 14 Jun 2019
Accepted: 10 Jul 2019
First published: 25 Jul 2019

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Dalton Trans., 2019,48, 12296-12302

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RE(H₂C₃N₃O₃)₂·(OH)·xH₂O (RE = La, Y and Gd): potential UV birefringent materials with strong optical anisotropy originating from the (H₂C₃N₃O₃)⁻ group

X. Hao, M. Luo, C. Lin, D. Lin, L. Cao and N. Ye, Dalton Trans., 2019, 48, 12296 DOI: 10.1039/C9DT02512J

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