三苯胺氰基丙烯酸类钕配合物的制备及发光性能

Synthesis and Luminescent Properties of Neodymium Complexes with Triphenylamine Cyanoacrylic Acid

分别以2-氰基-3-(4-(二苯胺)苯基)丙烯酸(TPA-1)、2-氰基-3-(5-(4-(二苯胺)苯基)-噻吩-2-基)丙烯酸(TPA-2)和2-氰基-3-(5'-(4-(二苯胺)苯乙烯基)-[2,2'-联噻吩]-5-基)丙烯酸(TPA-3)为配体合成了3个稀土配合物Nd(L)3·2H2O(L=TPA-1,TPA-2,TPA-3)。采用元素分析、核磁共振氢谱(1H NMR)、红外光谱(IR)对配合物的组成进行了确认。通过紫外-可见吸收光谱和荧光光谱的测定,研究了配体共轭链长度对配合物吸光和发光性能的影响。结果表明:配体共轭链长度的增加有效增大了配合物的摩尔吸光系数,拓宽了配合物的吸光范围。配合物固体粉末近红外发光测试表明,Nd(TPA-1)3·2H2O和Nd(TPA-2)3·2H2O在889,1063和1339 nm处有较强的发射峰,分别归属于Nd(III)4F3/2→4I9/2,4F3/2→4I11/2和4F3/2→4I13/2的特征跃迁。

Three rare earth complexes Nd（ L）3·2H2O（ L = TPA-1,TPA-2,TPA-3） with 2-cyano-3-（ 4-（ diphenylamino） phenyl） acrylic acid（ TPA-1）,2-cyano-3-（ 5-（ 4-（ diphenylamino） phenyl） thiophen-2-yl） acrylic acid（ TPA-2） and 2-cyano-3-（ 5＇-（ 4-（ diphenylamino） styryl）-[2,2＇-bithiophen]-5-yl） acrylic acid（ TPA-3） were synthesized and their structures were characterized by element analysis,1H NMR and infrared spectra. Furthermore,the effects of the length of the conjugated chain on absorption and luminescence properties were investigated by UV-visible absorption and fluorescence spectra. The results showed that both molar absorption coefficient and absorbance range of complexes were remarkably improved by increased the length of the conjugated chain. Nd（ TPA-1）3·2H2O and Nd（ TPA-2）3·2H2O showed three emission bands of at 889,1063 and 1339 nm which should be assigned to ^4F3 /2→^4I9 /2,^4F3 /2→^4I11 /2and ^4F3 /2→^4I13 /2transitions of the Nd（ III） ion.