Relationship Between the Ligand Structure and the Luminescent Properties of Water-Soluble Lanthanide Complexes Containing Bis(bipyridine) Anionic Arms
作者:Loïc J. Charbonnière、Nicolas Weibel、Pascal Retailleau、Raymond Ziessel
DOI:10.1002/chem.200600915
日期:2007.1
a glutamic acid, and the anionic functions at the 6'-position of the bipyridyl arms are made of the sodium salts of monoethylphosphonic ester (L(5)) and phosphonic acid (L(6)). The synthesis and characterisation of the ligands are described, together with the study of the formation of lanthanide complexes with europium and terbium. In the case of L(3), the europium complex obtained in acidic conditions
描述了一系列六个适合于在水中形成发光镧系元素络合物的新配体(L(1)-L(6))。配体L(1)-L(4)由两个与2-氨基亚甲基-6-羧基吡啶的氨基官能团键合的6'-羧基-6-亚甲基-2,2'-联吡啶发色臂构成(L( 1)),N,N-二乙酸乙二胺(L(2)),丝氨酸(L(3))或氨基丙二酸(L(4))。对于配体L(5)和L(6),连接氨基官能团是由谷氨酸提供的,联吡啶基臂6'-位的阴离子官能团是由单乙基膦酸酯的钠盐制成的(L(5 ))和膦酸(L(6))。描述了配体的合成和表征,以及与with和ter形成镧系元素络合物的研究。对于L(3),结晶了在酸性条件下获得的complex络合物,并描绘了X射线晶体结构。通过紫外可见吸收,稳态和时间分辨发光光谱研究了配合物的光物理性质。在水和氘水中测定了复合物的激发态发光寿命,以了解在复合物的第一个配位域中直接配位的水分子的数量。根据光谱数据质疑该系列配体