摘要
实验合成了稀土铕 樟脑酸 1,10 菲咯啉二元、三元配合物 ,通过元素分析、1 HNMR、中红外光谱、拉曼光谱 ,确定了配合物的组成为Eu2 (CA) 3·2H2 O ,Eu2 (CA) 3(phen) 2 (CA :樟脑酸根 ,phen :1,10 菲咯啉 ) ,另外 ,又合成了铕、镧混配的上述配合物 ,通过三维荧光光谱确定最佳激发波长为 310nm ,最强荧光波长为6 12nm ,即在 310nm光的激发下 ,发射光谱显示Eu3+ 的特征发射光谱 ,产生 7条谱带 ,分别是 5D0 7F0 (5 79nm) ,5D0 7F1 (5 94nm) ,5D0 7F2 (6 12 ,6 2 0nm) ,5D0 7F3(6 5 0nm) ,5D0 7F4 (6 89,6 97nm) ,其中7F2 和7F4能级发生了分裂。对荧光强度的研究表明 ,镧的掺入并没有降低铕的荧光强度 ,说明镧对铕的荧光发射有增强作用 ,但发射峰的位置基本不变。
The complexes of europium(Ⅲ) with camphoric acid and 1,10-phenanthroline have been synthesized and characterized by elemental analysis, 1H NMR, IR and FT-Raman. The compositions of the complexes have been confirmed to be Eu 2(CA) 3·2H 2O and Eu 2(CA) 3(phen) 2 (CA: camphoric acid, phen: 1,10-phenanthroline). In addition, the camphoric acid and 1,10-phenanthroline-mixed coordination compounds of Eu 3+-La 3+ have been synthesized. Three-dimensional fluorescence spectra showed that the optimum excitation wavelength was 310 nm, and the strongest emission wavelength was 612 nm. When 310 nm light was used as an excitation wavelength, the seven bands due to 5D 0- 7F 0(579 nm), 5D 0- 7F 1(594 nm), 5D 0- 7F 2(612 and 620 nm), 5D 0- 7F 3(650 nm) and 5D 0- 7F 4(689 and 697 nm) were observed between 550-700 nm, in which 5D 0- 7F 2 transitions contain two lines(612 and 620 nm), and 5D 0- 7F 4 transitions also contain two lines(689 and 697 nm). The excitation spectra showed that excitation band was from 240 to 340 nm, and the maximum was at about 310 nm. The fluorescence studies on all of samples showed that the fluorescence intensities of europium ions were sensitized by lanthanum ions, but the peak position of their emission band did not shift obviously.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2004年第7期799-802,共4页
Spectroscopy and Spectral Analysis
基金
国家重点基础研究发展规划项目 (G1 9980 61 31 1 )
国家自然科学基金 (2 0 1 61 0 0 1 )
内蒙古自治区自然科学基金 (2 0 0 1 0 90 1 1 4 )资助项目
关键词
铕
樟脑酸
1
10-菲咯啉配合物
合成
发光性质
Rare earth complexes
Europium ion
Camphoric acid
1,10-phenanthroline
Fluorescence properties
