A series of new silver selenites with d0-TM cations. Issue 83 (23rd August 2016)

• Record Type: Journal Article
• Authors: Qian, Qian; Kong, Fang; Mao, Jiang-Gao
• Is Part Of: RSC advances. Volume 6:Issue 83(2016)
• Page Start: 79681
• Page End: 79687
• Publication Date: 2016-08-23
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra17867g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Four silver selenites containing d 0 -TM cations have been reported, one of them displays a moderately strong SHG response. Abstract : Systematic explorations of new phases in the Ag + –Ti 4+ /Zr 4+ /Nb 5+ /Ta 5+ –Se 4+ –O(F) system by hydrothermal syntheses or standard high temperature solid-state reactions resulted in four new mixed-metal silver selenites, namely, Ag3 Ti3 O3 (SeO3 )4 F (1, P 63 ), Ag2 ZrF2 (SeO3 )2 (2, Cmca ) and AgMO(SeO3 )2 (M = Nb, 3 ; Ta, 4 ) in the space group Cmcm . Ag3 Ti3 O3 (SeO3 )4 F features an interesting [Ti3 O3 (SeO3 )4 ] 2− 3D anionic framework composed of 1D chains of corner-sharing TiO6 octahedra which are further interconnected by tridentate bridging SeO3 2− anions, displaying 1D hexagonal channels of Ti6 Se6 12-member rings (MRs) along the c -axis, filled by the Ag + cations and isolated F − anions. More interestingly, it displays a moderate strong Second-Harmonic Generation (SHG) response about 2 times that of KH2 PO4 (KDP). Compound2 features a novel 1D [ZrF2 (SeO3 )2 ] 2 − anionic chain composed of edge-sharing ZrO4 F4 polyhedra in which two neighboring Zr 4+ cations are further bridged by a pair of selenite anions. Compounds3 and4 are isostructural and their structures feature 1D anionic chains of [MO(SeO3 )2 ] − (M = Nb, Ta) which are separated by Ag + cations, the 1D [MO(SeO3 )2 ] − (M = Nb, Ta) chain is formed by 1D chains of corner-sharing MO6 (M = Nb, Ta) octahedra in which two neighboring metal centers are also bridged by a pair of selenite anions. Other characterizations including thermal analyses, optical and luminescence property measurements have also been performed.