以Eu-苯甲酸-1,10-菲咯啉为掺杂剂的SiO_2,SiO_2-B_2O_3和SiO_2-B_2O_3-Na_2O体系材料的结构及Eu^(3+)的发光性质  

Structure and Luminescence Properties of Eu^(3+) Complexes with Benzoic Acid and 1,10-Phenanthroline Incorporated in SiO_2, SiO_2-B_2O_3 and SiO_2-B_2O_3-Na_2O Matrices

作　　者：王喜贵[1] 吴红英[1] 赵斯琴[1] 翁诗甫[2] 吴瑾光[2] 

机构地区：[1]内蒙古师范大学化学与环境科学学院,内蒙古呼和浩特010022 [2]北京大学化学与分子工程学院

出　　处：《光谱学与光谱分析》2006年第5期805-808,共4页Spectroscopy and Spectral Analysis

基　　金：国家重点基础研究发展规划项目(G1998061311);国家自然科学基金(20161001);内蒙古自治区自然科学基金(20010901-14);内蒙古师范大学青年基金项目;内蒙古师范大学和北京大学合作项目资助

摘　　要：用溶胶-凝胶法制备以Eu-苯甲酸-1,10-菲咯啉为掺杂剂的Si O2,Si O2-B2O3和Si O2-B2O3-Na2O为基质的发光材料。材料经1000℃退火处理后,结构十分稳定。通过激发光谱和发射光谱、红外光谱、TEM、XRD研究了基质结构对Eu3+发光性能的影响。结果显示:在589和614nm处显示Eu3+的特征发射带,对应于Eu3+的5D0→7Fj(j=1,2)跃迁;与直接掺入EuCl3的玻璃材料相比,以Eu-苯甲酸-1,10-菲咯啉为掺杂剂的玻璃材料,虽然Eu的掺杂量较小,但Eu的发光强度较大。与以Si O2为基质的玻璃材料相比,以Si O2-B2O3为基质的玻璃材料Eu3+的发光减弱,其红外光谱显示形成Si—O—B键,说明该结构对Eu3+的发光有猝灭作用,以Si O2-B2O3-Na2O为基质的玻璃材料Eu3+的发光明显增强,其红外光谱显示不存在Si—O—B键的振动吸收,可能是Na取代B的位置,形成Si—O—Na键,此结构对Eu3+的发光有一定的增强作用。Eu^3＋ Complexes with benzoic acid and 1,10-phenanthroline incorporated in SiO2, SiO2-B2O3 and SiO2-B2O3-Na2O matrices were prepared via the sol-gel method. Eu-doped SiO2, SiO2-B2O3 and SiO2-B2O3-Na2O luminescence materials were synthesized. The luminescence of Eu^3＋ was studied with excitation spectra and emission spectra. Different forms of dopants could influence the luminescence properties. The structure of Eu-doped glass was studied by comparing IR, TEM and XRD. The results showed that after the materials were annealed at 1000℃ the structure was very stable because ingredient was already removed totally. The emission spectrum showed that the typical optical spectrum of Eu^3＋ is ^5D0→^7Fj （j = 1, 2） at 588 nm and 614 nm, Comparing EuCl3 with Eu^3＋ complexes with benzoic acid and 1,10-phenanthroline as dopant, the latter has strong luminescence property though it has small mass fraction. The luminescence intensity of Eu^3＋-doped SiO2-B2O3 glass material was weaker than that of Eu^3＋-doped SiO2 glass material, and the former＇s spectrum showed that there were Si--O--B bonds. The luminescence intensity of Eu^3＋ was quenched by this kind of structure. The luminescence intensity of Eu^3＋-doped SiO2-B2O3-Na2O glass material was greatly increased, and the infrared spectrum illustrated that there was not vibration absorption of Si--O--B bonds. Probably Na replaced B, and Si--O--Na bonds formed. This kind of structure could enhance luminescence intensity of Eu^3＋ to some extend.

关 键 词：溶胶-凝胶法 稀土离子 发光性质 Eu3+ 

分 类 号：O614.3[理学—无机化学]