A new member of mixed-metal Ba2Bi2M-Ⅱ（PO4）4 monophosphate, namely Ba2Bi2Co（PO4）4, was synthesized by solid state method and characterized by X-ray single-crystal diffraction and powder diffraction for the first t...A new member of mixed-metal Ba2Bi2M-Ⅱ（PO4）4 monophosphate, namely Ba2Bi2Co（PO4）4, was synthesized by solid state method and characterized by X-ray single-crystal diffraction and powder diffraction for the first time. It crystallizes in the orthorhombic system with space group Pnma（No. 62） and features a 3D architecture built up of adjacent zig-zag linear structures of [CoP4O（16）]∞ along [100], and further connected by [Bi2O（11）] dimers to form a 3D framework, where the Ba2＋ are located in the free space. The stereochemical activity of the Bi3＋ lone pair has also been discussed. The result of magnetic property measurement confirms the antiferromagnetic property of Ba2Bi2Co（PO4）4.展开更多
Obtaining sulfate-based materials with large birefringence is of great challenge due to the weak polarizability anisotropy of the constituting spherical SO_(4)^(2-)tetrahedron.Here,we have implemented a polyhedron of ...Obtaining sulfate-based materials with large birefringence is of great challenge due to the weak polarizability anisotropy of the constituting spherical SO_(4)^(2-)tetrahedron.Here,we have implemented a polyhedron of stereoactive lone pair cations,IO_(3)-to the system to tackle the issue.Centimetre-sized single crystals of an alkali metal sulfate iodate,K_(2)SO_(4)·HIO_(3),have been readily grown by an accessible solution-evaporation method.Optical measurements on K_(2)SO_(4)·HIO_(3)single crystals reveal that the reported material exhibits a 70-fold increase in birefringence(ca.0.14 at 589.3 nm)compared to that of the singular sulfate,K_(2)SO_(4).In addition,K_(2)SO_(4)·HIO_(3)exhibits a blue-shifted UV cutoff edge of 275 nm,25 nm shorter than that ofα-HIO_(3),highlighting the key role of the SO_(4)^(2-)tetrahedron in broadening the transmittance window.展开更多
基金Supported by the National Natural Science Foundation of China(No.21101156)the State Key Laboratory of Structural Chemistry(No.20150016)+1 种基金Outstanding youth of colleges and universities of Department of Education,Fujian Province Natural Science Foundation for Youths(No.2016J05109)Fujian Education Department(No.JK2015056)
文摘A new member of mixed-metal Ba2Bi2M-Ⅱ（PO4）4 monophosphate, namely Ba2Bi2Co（PO4）4, was synthesized by solid state method and characterized by X-ray single-crystal diffraction and powder diffraction for the first time. It crystallizes in the orthorhombic system with space group Pnma（No. 62） and features a 3D architecture built up of adjacent zig-zag linear structures of [CoP4O（16）]∞ along [100], and further connected by [Bi2O（11）] dimers to form a 3D framework, where the Ba2＋ are located in the free space. The stereochemical activity of the Bi3＋ lone pair has also been discussed. The result of magnetic property measurement confirms the antiferromagnetic property of Ba2Bi2Co（PO4）4.
基金supported by the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(grant no.2018R1A5A1025208 and 2019R1A2C3005530).
文摘Obtaining sulfate-based materials with large birefringence is of great challenge due to the weak polarizability anisotropy of the constituting spherical SO_(4)^(2-)tetrahedron.Here,we have implemented a polyhedron of stereoactive lone pair cations,IO_(3)-to the system to tackle the issue.Centimetre-sized single crystals of an alkali metal sulfate iodate,K_(2)SO_(4)·HIO_(3),have been readily grown by an accessible solution-evaporation method.Optical measurements on K_(2)SO_(4)·HIO_(3)single crystals reveal that the reported material exhibits a 70-fold increase in birefringence(ca.0.14 at 589.3 nm)compared to that of the singular sulfate,K_(2)SO_(4).In addition,K_(2)SO_(4)·HIO_(3)exhibits a blue-shifted UV cutoff edge of 275 nm,25 nm shorter than that ofα-HIO_(3),highlighting the key role of the SO_(4)^(2-)tetrahedron in broadening the transmittance window.
