摘要
Composite borate-phosphate compounds have always attracted much attention for their structure diversity and interesting properties.In this work,a new borate-phosphate Cs Na_(2)Lu_(2)(BO_(3))(PO_(4))_(2) (CNLBP) was found for the first time and its structure was characterized by single-crystal X-ray diffraction method.It crystallizes in orthorhombic system,space group Cmcm with a=6.8750(5),b=14.6919(1),c=10.5581(7)?,V=1066.44(1)?^(3),Z=4,M_(r)=777.58,D_(c)=4.843 g/cm^(3),F(000)=1368,μ(Mo Kα)=22.20 mm^(-1),R(F^(2)>2σ(F^(2)))=0.0173 and w R(F^(2))=0.0367.The structure of CNLBP features a chain framework of[Lu_(2)(BO_(3))(PO_(4))_(2)]_(∞)that delimits 1Dtunnels filled by Na^(+)and Cs^(+)ions.Phosphors CNLBP:x Tb (x=0,0.1,0.2,0.4,0.6,0.8,1.0) were prepared,and it can emit bright green light under near-UV excitation due to the ^(5)D_(4)→^(7)F_(j) (j=6,5,4,3) transition of Tb^(3+).Due to the large separation of Lu^(3+)ions in CNLBP structure lattice,the optimal concentration of Tb^(3+)is 80%,and concentration quenching occurs only for the full Tb^(3+)concentration.
作者
SHI Jian-Chao
WANG Hao
ZHANG Rui-Juan
ZHAO Dan
时建朝;王昊;张瑞娟;赵丹(College of Chemistry and Chemical Engineering,Henan Polytechnic University,Henan 454000,China;School of Physics and Electronic Information Engineering,Henan Polytechnic University,Henan 454000,China)
基金
supported by the National Natural Science Foundation of China (No. 21201056)。
