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K 2 ZnSn 3 Se 8 : A Non‐Centrosymmetric Zinc Selenidostannate(IV) Featuring Interesting Covalently Bonded [ZnSn 3 Se 8 ] 2− Layer and Exhibiting Intriguing Second Harmonic Generation Activity
Author(s) -
Zhou Molin,
Jiang Xingxing,
Yang Yi,
Guo Yangwu,
Lin Zheshuai,
Yao JJiyong,
Wu Yicheng
Publication year - 2017
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201700426
Subject(s) - raman spectroscopy , band gap , zinc , covalent bond , crystallography , zinc compounds , diffraction , spectroscopy , phase (matter) , phonon , materials science , chemistry , second harmonic generation , analytical chemistry (journal) , optics , condensed matter physics , physics , optoelectronics , organic chemistry , quantum mechanics , metallurgy , laser , chromatography
Abstract Non‐centrosymmetric zinc selenidostannate(IV) K 2 ZnSn 3 Se 8 was synthesized. It features interesting covalently bonded [ZnSn 3 Se 8 ] 2− layers with K + cations filling in the interlayer voids. The phonon spectrum was calculated to clarify its structural stability. Based on the X‐ray diffraction data along with the Raman spectrum, the major bonding features of the title compound were identified. According to the UV/vis‐NIR spectroscopy, K 2 ZnSn 3 Se 8 possesses a typical direct band gap of 2.10 eV, which is in good agreement with the band structure calculations. Moreover, our experimental measurements and detailed theoretical calculations reveal that K 2 ZnSn 3 Se 8 is a new phase‐matchable nonlinear optical material with a powder second harmonic generation (SHG) signal about 0.6 times of that of AgGaS 2 .