期刊
INORGANIC CHEMISTRY
卷 56, 期 1, 页码 114-124出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.6b01016
关键词
-
资金
- NSF of China [91222204, 21403231, 21303203, 21403237, 21401052]
- NSF of Fujian Province [2014J05025, 2014J05034]
Two new phases in the Ag-Cd-P-S system containing two second-order Jahn-Teller (SOJT) distorted d(10) cations (Cd2+ and Ag+), namely, Ag2Cd(P2S6) (1) and AgCd3(PS4)S-2 (2), are obtained via medium temperature solid-state synthesis. Compound I exhibits a two-dimensional layered structure and undergoes a first-order structural phase transition at approximately 280 degrees C. This outcome can be ascribed to the significant mismatch in the expansion coefficients between Cd-S (Ag-S) and P-P (PS) bonds evaluated through bond valence theory. The three-dimensional noncentrosymmetric (NCS) framework of 2 is constructed by two types of tetrahedral layers consisting of corner-shared CdS4, AgS4, and PS4 tetrahedra. Compound 2 exhibits second harmonic generation (SHG) intensity of 0.45 times that of commercial AgGaS2 (AGS) at a laser irradiation of 1.85 mu m and an optical band gap of 2.56 eV, and no intrinsic vibrational absorption of chemical bonds is observed in the range of 2.5-18.2 mu m. Both phase transition in 1 and SHG properties in 2 are closely related to the SOJT distorted d(10) cations and diverse phosphorus-sulfur polyanions (PaSb)(n-), which together can easily result in NCS distorted structures and interesting properties.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据