Three new bismuth phosphates,Li_(2)ABi(PO_(4))_(2)(A=K,Rb,and Cs),were synthesized through the high-temperature solution method.They all exhibit three-dimensional (3D) [Li_(2)P_(2)O_(8)]^(4-) frameworks built by isola...Three new bismuth phosphates,Li_(2)ABi(PO_(4))_(2)(A=K,Rb,and Cs),were synthesized through the high-temperature solution method.They all exhibit three-dimensional (3D) [Li_(2)P_(2)O_(8)]^(4-) frameworks built by isolated PO_(4) tetrahedra and Li–O chains but crystallize in two different space groups,which can be attributed to the effects of alkali metal cations that control the connection modes of units.Li_(2)KBi(PO_(4))_(2),Li_(2)RbBi(PO_(4))_(2)and Li_(2)CsBi(PO_(4))_(2)show SHG intensities about 5.0,3.1 and 2.5 times that of KDP,respectively,and are all phase-matchable.To the best of our knowledge,Li_(2)KBi(PO_(4))_(2)exhibits the largest SHG response among the bismuth phosphates.The effects of cations on the SHG responses have been discussed in detail.Our results indicate that introduction of the Bi^(3+) cation with large distortion and synclastic arrangement of the Bi–O polyhedra is crucial to produce the large SHG response for phosphate NLO materials.展开更多
基金s upported by the West Light Foundation of the CAS(Grant No.2016-YJRC-2,2016-QNXZ-A-2)the National Natural Science Foundation of China(Grant No.61835014,51972336)the High-level Professional and Technical Personnel of Autonomous Region,and the Key Research Project of Frontier Science of CAS(Grant No.QYZDB-SSW-JSC049).
文摘Three new bismuth phosphates,Li_(2)ABi(PO_(4))_(2)(A=K,Rb,and Cs),were synthesized through the high-temperature solution method.They all exhibit three-dimensional (3D) [Li_(2)P_(2)O_(8)]^(4-) frameworks built by isolated PO_(4) tetrahedra and Li–O chains but crystallize in two different space groups,which can be attributed to the effects of alkali metal cations that control the connection modes of units.Li_(2)KBi(PO_(4))_(2),Li_(2)RbBi(PO_(4))_(2)and Li_(2)CsBi(PO_(4))_(2)show SHG intensities about 5.0,3.1 and 2.5 times that of KDP,respectively,and are all phase-matchable.To the best of our knowledge,Li_(2)KBi(PO_(4))_(2)exhibits the largest SHG response among the bismuth phosphates.The effects of cations on the SHG responses have been discussed in detail.Our results indicate that introduction of the Bi^(3+) cation with large distortion and synclastic arrangement of the Bi–O polyhedra is crucial to produce the large SHG response for phosphate NLO materials.
