From AgTeO2F and Ag2(TeO2F2) to Ag3F3(TeF6)(TeO2)12: the first silver tellurite oxyfluorides with linear and nonlinear optical properties. Issue 4 (23rd January 2023)

• Record Type: Journal Article
• Authors: Zhang, Bo; Wu, Jia-Hang; Hu, Chun-Li; Li, Ya-Feng; Kong, Fang; Mao, Jiang-Gao
• Is Part Of: Inorganic chemistry frontiers. Volume 10:Issue 4(2023
• Page Start: 1328
• Page End: 1337
• Publication Date: 2023-01-23
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2qi02272a
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : AgTeO2 F and Ag2 (TeO2 F2 ) are the first silver fluorotellurites, while Ag3 F3 (TeF6 )(TeO2 )12 is the first silver fluoride tellurite. Ag3 F3 (TeF6 )(TeO2 )12 features an NCS mixed valence Te oxyfluoride with an SHG intensity of about 70% that of commercial KDP. Abstract : The first examples of silver fluorotellurites, namely, AgTeO2 F and Ag2 (TeO2 F2 ), and the first silver fluoride tellurite, Ag3 F3 (TeF6 )(TeO2 )12, have been obtained successfully under mild hydrothermal conditions. AgTeO2 F displays a new 2D structure composed of a 2D silver oxide layer strengthened by 1D [TeO2 F]∞ chains. Ag2 (TeO2 F2 ) exhibits a new 3D construction consisting of a 3D silver oxyfluoride framework with 1D polyhedral ring channels occupied by the isolated TeO2 F2 groups. Ag3 F3 (TeF6 )(TeO2 )12 features the first 3D neutral [TeO2 ]∞ open framework with 8- and 4-MPR channels along the a -, b - and c -axes. AgTeO2 F and Ag2 (TeO2 F2 ) crystallize in the centrosymmetric space group while Ag3 F3 (TeF6 )(TeO2 )12 is in a non-centrosymmetric space group. Ag3 F3 (TeF6 )(TeO2 )12 shows a unique nonlinear optical property with an SHG intensity of about 70% that of commercial KH2 PO4, while AgTeO2 F and Ag2 (TeO2 F2 ) present an apparent linear optical property and their birefringence is calculated as 0.078 and 0.032@1064 nm, respectively. This work further confirms that fluorination in tellurium(iv ) oxides can greatly enrich the structural chemistry and optical properties of metal tellurites.