A series of new acentric fluoroborophosphates,namely,RbBPO_(4)F,CsBPO_(4)F and(NH_(4))_(2)BPO_(4)F_(2),have been obtained by combining BO_(3)F or BO_(2)F_(2)with a PO_(4)tetrahedron.The structures of the isomeric RbBP...A series of new acentric fluoroborophosphates,namely,RbBPO_(4)F,CsBPO_(4)F and(NH_(4))_(2)BPO_(4)F_(2),have been obtained by combining BO_(3)F or BO_(2)F_(2)with a PO_(4)tetrahedron.The structures of the isomeric RbBPO_(4)F and CsBPO_(4)F feature a three-dimensional diamond framework,in which a BO_(3)F(or PO_(4))tetrahedron corner is shared with three PO_(4)(or BO_(3)F)tetrahedra,forming 1D tunnels of eight-membered rings(MRs)along the three axial directions,which are filled with alkali cations.(NH_(4))_(2)BPO_(4)F_(2)exhibits a 3D supramolecular structure,in which 1D[BPO_(4)F_(2)]^(1-)anionic chains along the a axes based on cornersharing and alternating PO_(4)and BO_(2)F_(2)tetrahedra are further interconnected with ammonium cations by electrostatic attractions and hydrogen bonds.RbBPO_(4)F,CsBPO_(4)F and(NH_(4))_(2)BPO_(4)F_(2)display second-harmonic generation(SHG)signals approximately 0.4,0.6 and 0.8 times that of KH_(2)PO_(4)(KDP)and exhibit short UV absorption edges(<200 nm).Measurements of thermal stability and optical properties and theoretical calculations have also been performed.展开更多
基金National Natural Science Foundation of China(No.21875248,91622112,and 21701173)Strategic Priority Research Program of the Chinese Academy of Sciences(XDB20000000)100 Talents Project of Fujian Province。
文摘A series of new acentric fluoroborophosphates,namely,RbBPO_(4)F,CsBPO_(4)F and(NH_(4))_(2)BPO_(4)F_(2),have been obtained by combining BO_(3)F or BO_(2)F_(2)with a PO_(4)tetrahedron.The structures of the isomeric RbBPO_(4)F and CsBPO_(4)F feature a three-dimensional diamond framework,in which a BO_(3)F(or PO_(4))tetrahedron corner is shared with three PO_(4)(or BO_(3)F)tetrahedra,forming 1D tunnels of eight-membered rings(MRs)along the three axial directions,which are filled with alkali cations.(NH_(4))_(2)BPO_(4)F_(2)exhibits a 3D supramolecular structure,in which 1D[BPO_(4)F_(2)]^(1-)anionic chains along the a axes based on cornersharing and alternating PO_(4)and BO_(2)F_(2)tetrahedra are further interconnected with ammonium cations by electrostatic attractions and hydrogen bonds.RbBPO_(4)F,CsBPO_(4)F and(NH_(4))_(2)BPO_(4)F_(2)display second-harmonic generation(SHG)signals approximately 0.4,0.6 and 0.8 times that of KH_(2)PO_(4)(KDP)and exhibit short UV absorption edges(<200 nm).Measurements of thermal stability and optical properties and theoretical calculations have also been performed.
