Issue 28, 2023

Na7(SeO4)3(IO3) and K2(SeO4)[IO2(OH)]: two new iodate-selenates with short-wave UV cutoff edge and large birefringence

Abstract

Herein, I5+ with stereochemically active lone pairs (SCALP) was introduced into the selenate system, and two novel iodate-selenates were successfully obtained, Na7(SeO4)3(IO3) and K2(SeO4)[IO2(OH)]. Innovatively, both the title compounds are potential short-wave ultraviolet (UV) birefringent materials that possess large optical band gaps (4.57 eV and 4.27 eV, respectively) and large birefringence (0.087@546 nm and 0.101@546 nm, respectively). Simultaneously, the powder second harmonic generation (SHG) measurement reveals that Na7(SeO4)3(IO3) exhibits SHG responses of 0.6 × KDP (KH2PO4) with type-I phase matching. Detailed structural analysis and theoretical calculations confirm the excellent optical performance originating from the cooperative effect of [SeO4] and [IO3]/[IO2(OH)] functional units. This work indicates that the iodate-selenate system offers additional candidates for designing short-wave UV optical materials.

Graphical abstract: Na7(SeO4)3(IO3) and K2(SeO4)[IO2(OH)]: two new iodate-selenates with short-wave UV cutoff edge and large birefringence

Supplementary files

Article information

Article type
Paper
Submitted
08 May 2023
Accepted
06 Jun 2023
First published
07 Jun 2023

J. Mater. Chem. C, 2023,11, 9465-9471

Na7(SeO4)3(IO3) and K2(SeO4)[IO2(OH)]: two new iodate-selenates with short-wave UV cutoff edge and large birefringence

W. Song, J. Ren, J. Tan, L. Cao, X. Dong, L. Huang, D. Gao and G. Zou, J. Mater. Chem. C, 2023, 11, 9465 DOI: 10.1039/D3TC01613G

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