A disymmetric terpyridine based ligand for the formation of luminescent di-aquo lanthanide complexes
作者:Loïc J. Charbonnière、Samir Mameri、David Flot、Fanny Waltz、Christelle Zandanel、Raymond F. Ziessel
DOI:10.1039/b700837f
日期:——
stoichiometry. Complexes with general formula [LnL(H2O)2] were isolated from neutralwater solutions containing equimolar amounts of cations and ligands, and the complexes were characterized in the solid state (elemental analysis, IR) and in solution (mass spectrometry). The photo-physical properties of the luminescent complexes of Eu and Tb were studied in water solution by means of absorption, steady state
的合成 配体 L H 3基于双对称取代的三联吡啶核,由羧酸描述了在6-位上的双键和在6''-位上的双(羧甲基)氨基甲基官能团。该七齿(4N / 3O)的配位行为配体 与镧系元素 阳离子(Ln = Eu,Gd和Tb)在溶液中进行了研究,结果显示化学计量比为[Ln L ]的配合物形成。从含有等摩尔量乙二醛的中性水溶液中分离出通式为[Ln L(H 2 O)2 ]的配合物。阳离子 和 配体,并且在固态下对配合物进行了表征(元素分析, 红外)和解决方案(质谱)。通过吸收,稳态和时间分辨发射光谱法研究了水溶液中Eu和Tb发光配合物的光物理性质。Eu和Tb配合物在水中发光寿命的演变。高氧2和D 2 O揭示了两个的存在水 在第一个配位域内配位的分子 阳离子。尽管有这个重要的水合数,但配合物的整体发光量子产率仍然提高,尤其是在Tb的情况下(Tb和Eu分别为Φ = 22.0和6.5%)。之上结晶化 Gd络合物
Relaxation and luminescence studies on hydrated bipyridyl- and terpyridyl-based lanthanide complexes
complexes are faster than those of currently used contrast agents (k(ex)(298) = 14.0 +/- 1.5 x 10(6) and 11.1 +/- 1.1 x10(6) s(-1) for [GdL1(H(2)O)(2)] and [GdL2(H(2)O)(3)], respectively). The rotational correlation time calculated for [GdL1(H(2)O)(2)] appeared to be long (110 +/- 16 ps vs 65 +/- 5ps for [GdL2(H(2)O)(3)]), pointing to a hindered rotation due to the larger aromatic frame. Finally, the
Efficient route to hybrid polypyridine–carboxylate ligands for lanthanide complexation
作者:Samir Mameri、Loïc Charbonnière、Raymond Ziessel
DOI:10.1016/j.tetlet.2007.10.121
日期:2007.12
An efficient methodology for the preparation of aminobutyl-bromo-terpyridine is described using a preformed imine prepared from a gem-dibromomethyl terpyridine derivative and the primary amine and further reduced to the secondaryamine. Alkylation with pyridine, bipyridine, or terpyridine residues in the presence of a mineral base provides highly functionalized asymmetrical and symmetrical N-heterocyclic