摘要
在氮气保护下,以无水乙醇为溶剂,制备了硝酸镧与4-氨基-1,2,4-三氮唑缩对二甲氨基苯甲醛(L)配合物,单晶结构分析确定其组成为LaL3(NO3)3.(H2O)2.(C2H5OH)2,配合物中La3+分别与3个硝酸根、2个水分子和2个分子乙醇中的氧原子配位,配位数为10,并与4-氨基-1,2,4-三氮唑缩对二甲氨基苯甲醛以氢键形式结合形成立体结构分子。通过元素分析、红外光谱、固体荧光光谱等手段对合成的配体及配合物进行了表征。实验结果表明,4-氨基-1,2,4-三氮唑缩对二甲氨基苯甲醛是一种多晶粉末状的发光材料,固体荧光谱图显示荧光发射峰在451nm处,为蓝色荧光,色纯度高,荧光量子效率高,而合成的配合物的荧光发射峰则红移至464nm左右,同时荧光强度显著增强近一倍。
The solid complex of lanthanum nitrate hydrate with 4-（p-dimethylaminobenzaldehydeamino）-4H-1,2,4-triazole（L）LaL3（NO3）3·（H2O）2·（C2H5OH）2 was synthesized in dry N2 atmosphere and absolute alcohol.The composition of the complex was determined by chemical and elemental analyses.The crystal structure showed that La3＋ was coordinated by ten oxygen atoms with three nitrate,two water and two alcohol molecules.Characterized by elemental analysis,infrared spectroscopy,and solid fluorescence,the experimental results showed that the free ligand is a thermally stable material,and emitted intensive blue fluorescence at the peak wavelength of 451 nm.Compared with the fluorescence emission of free ligand in solid-state,the emission of complex of LaL3（NO3）3·（H2O）2·（C2H5OH）2 red-shifted to 464 nm and exhibited stronger blue fluorescence.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2009年第12期3332-3334,共3页
Spectroscopy and Spectral Analysis
基金
国家"九七三"前期预研项目(2006CB708606)
宁夏自然科学基金项目(2004-ZD01)资助
关键词
镧配合物
元素分析
红外光谱
固体荧光
Lanthanum complex Elemental analysis Infrared spectroscopy Solid fluorescence
