M_5(PO_4)_3F (M=Ca,Sr,Ba)中Sm^(3+)的电荷迁移态及Sm^(3+)和Eu^(3+)的电荷迁移能量关系(英文)  

Charge Transfer States of Sm^(3+) and Charge Transfer Energy Relationship between Sm^(3+) and Eu^(3+) in M_5(PO_4)_3F (M=Ca,Sr,Ba)

作　　者：曾取[1] 梁宏斌[1] 田梓峰[1] 林惠红[1] 苏锵[1] 

机构地区：[1]中山大学化学与化学工程学院

出　　处：《无机化学学报》2008年第3期333-339,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20571088);广东省科技计划项目(No.2005A10609001)资助项目

摘　　要：采用高温固相反应合成了M_5-2xSm_xNa_x(P_O4)_3F(M=Ca,Sr,Ba)荧光体,研究了其在真空紫外-可见光范围的发光特性。发现在Ca_5(P_O4)_3F中Sm^3+的电荷迁移带约在191nm,在Sr_5(P_O4)_3F中约在199nm,而在Ba_5(P_O4)_3F中约在204nm,随着被取代碱土离子半径的增大电荷迁移能量逐渐减小。比较了M_5(P_O4)_3F(M=Ca,Sr,Ba)中Sm)~3+和Eu^3+电荷迁移能量的关系。The phosphors with general molecular formula M5-2xSmxNax（PO4）3F （M=Ca, Sr, Ba） were prepared by a high-temperature solid state reaction technique. The spectroscopic properties in VUV-Vis （vacuum ultraviolet-Visible）range were investigated. The maxima of CTBs （charge transfer bands） were found to be at about 191 nm for M=Ca, 199 nm for M=Sr, and 204 nm for M=Ba, showing the CT energy decreasing with the increase of the site size. The CT energy difference of Sm^3＋ and Eu^3＋ in a specific host lattice M5（PO4）3F （M=Ca, Sr, Ba） was compared. The relationships on the substituted ionic radii and the CT energy of Sm^3＋ and Eu^3＋ in M5（PO4）3F （M=Ca, Sr, Ba） are proposed.

关 键 词：Ca5(PO4)3F Sr5(PO4)3F Ba5(PO4)3F SM^3+ 电荷迁移态 

分 类 号：O614.33[理学—无机化学] O614.23[理学—化学]