【摘要】 分别以1,10-邻菲啰啉、三苯基氧膦、2,2’-联吡啶为第二配体,并以苯甲酰丙酮为第一配体,合成了3种铽(Ⅲ)配合物。通过元素分析和红外吸收光谱确定了其结构,并利用紫外-可见吸收光谱和荧光光谱,研究其发光机理。研究结果表明,3种铽(Ⅲ)配合物的光吸收以第一配体为主,激发下均能发射Tb3+的5 D4→7F4的电子跃迁特征峰;第一配体的第一激发态能级与第二配体间三重态激发能级之间的能级差以及第二配体三重态激发能级与Tb3+离子的5 D4间能级差是决定其荧光量子效率的两个关键参数。更多还原

【Abstract】 Three types of terbium complexes were synthesized by introducing benzoylacetone as the first ligand and 1,10-phenanthroline,triphenylphosphine oxide,2,2’-dipyridyl as the second ligand,respectively.The structures of above materials were identified by infrared absorption spectra and chemical elemental analysis,and their light mechanism was studied by detail analysis of ultraviolet-visible absorption spectra and fluorescence spectra.The research results indicated that terbium complexes absorb energy by the first ligand when excited,and emit green light owing to 5 D4→7F4electron transition of terbium ion immediately;it is suggested that the fluorescence yield of terbium complexes doesn’t only depend on the energy difference between the singlet excita-tion state of the first ligand and the triple excitation state of second ligand,but the energy difference between the triple excitation state of the second ligand and the 5 D4energy state of terbium ion.更多还原