Issue 2, 2022

K3V2O3F4(IO3)3: a high-performance SHG crystal containing both five and six-coordinated V5+ cations

Abstract

The combination of d0 transition metal oxofluorides with iodate anions helps to synthesize polar crystals. Herein, a novel polar crystal, K3V2O3F4(IO3)3, which is the first metal vanadium iodate with two types of V5+-centered polyhedra (VO4F2 octahedron and VO3F2 trigonal bipyramid), has been prepared hydrothermally. It crystallizes in the polar space group of Cmc21 and its structure displays an unprecedented 0D [V2O3F4(IO3)3]3− anion, which is composed of Λ-shaped cis-[VO2F2(IO3)2]3− and [VO2F2(IO3)]2− anions interconnected via the corner-sharing of one oxo anion. The synergy gained from the VO4F2, VO3F2 and IO3 groups resulted in K3V2O3F4(IO3)3 exhibiting both a strong second-harmonic generation (SHG) response (1.3 × KTiOPO4) under 2050 nm laser irradiation and a large birefringence (0.158 @ 2050 nm). This study provides a facile route for designing SHG materials by assembling various vanadium oxide-fluoride motifs and iodate anions into one compound.

Graphical abstract: K3V2O3F4(IO3)3: a high-performance SHG crystal containing both five and six-coordinated V5+ cations

Supplementary files

Article information

Article type
Edge Article
Submitted
01 Nov 2021
Accepted
05 Dec 2021
First published
06 Dec 2021
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2022,13, 454-460

K3V2O3F4(IO3)3: a high-performance SHG crystal containing both five and six-coordinated V5+ cations

J. Chen, C. Hu, Y. Lin, Y. Chen, Q. Chen and J. Mao, Chem. Sci., 2022, 13, 454 DOI: 10.1039/D1SC06026K

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