摘要
在乙醇为溶剂的条件下,以8 羟基喹啉为PH调节剂,制备出了稀土Eu与2,2 二羟甲基丙酸、1,10 菲口罗啉的新型四元配合物。通过元素分析、红外光谱、13C固相核磁谱对其组成结构进行了表征,其基本结构为:Eu(CH3C(CH2OH)2COO)(NO3)2(phen)。电导率的测定结果表明配合物为非电解,并且配合物的溶解和紫外吸收特性与各配体明显不同,这些结果进一步表明各配体与稀土配位形成了新的配合物。该配合物由于分子单元中,双羟基官能团的存在使其可进一步进行聚合反应,为合成稀土高分子聚合物提供了新的途径。配合物的荧光光谱分析的结果表明:合成的配合物在594,620和701nm处都出现了发射峰,这分别与Eu3+的5D0→2F1,5D0→2F2和5D0→2F4跃迁相对应。在620nm处出现的较强的发射峰表明配合物具有很好的荧光性能。
A new quaternary complex with 2,2-dihydroxymethyl propionic acid and 1,10-phenanthroline, Eu(CH_3C(CH_2OH)_2COO)(NO_3)_2(phen), was synthesized in ethanol solution and characterized by elemental analysis, IR and solid-state (^(13)C NMR.) The result of molar electro conductivity of complex indicates that it is non-electrolyte. Solution properties and UV spectra of complex further verify that the complex is different from that of ligants. In addition, the analytical results also imply that the two hydroxyl groups of 2,2-dihydroxymethyl propionic acid are not involved in the coordinate reaction. This will provide a new way for producing new multifunctional polymer materials with excellent fluorescent property. The fluorescence spectra of the complex were studied. The main fluorescence emission peaks of the complex appear at 594, 620 and 701 nm, the most intense peak is at 620 nm. These fluorescent emission peaks correspond to transitions from (~5D_0) to (~2F_1,) (~2F_2) and (~2F_4) energy levels of Eu(Ⅲ), respectively. The experimental results also indicate that the complex has excellent fluorescent property.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2005年第1期1-5,共5页
Journal of the Chinese Society of Rare Earths
关键词
2
2-二羟甲基丙酸
配合物
荧光
稀土
dihydroxymethyl propionic acid
quaternary complex
fluorescence
rare earths
