一种能与镧系(III)离子络合并使其敏化的[环四亚甲基]四[2-羟基苯甲酰胺]配体。
A [Cyclentetrakis(methylene)]tetrakis[2-hydroxybenzamide] Ligand That Complexes and Sensitizes Lanthanide(III) Ions.
作者信息
D'Aléo Anthony, Xu Jide, Do King, Muller Gilles, Raymond Kenneth N
机构信息
Chemical Sciences Division, Lawrence Berkeley National Laboratories, Berkeley, CA 94720, and Department of Chemistry, University of California, Berkeley, CA 94720-1460, USA.
出版信息
Helv Chim Acta. 2009 Nov 1;92(11):2439-2460. doi: 10.1002/hlca.200900161.
The synthesis of the cyclen derivative H(4)L(1)·2 HBr containing four 2-hydroxybenzamide groups is described. The spectroscopic properties of the Ln(III) conplexes of L(1) (Ln=Gd, Tb, Yb, and Eu) reveal changes of the UV/VIS-absorption, circular-dichroism-absorption, luminescence, and circularly polarized luminescence spectra. It is shown that at least two metal-complex species are present in solution, whose relative amounts are pH dependent. At pH > 8.0, an intense long-lived emission is observed (for [TbL(1)] and [YbL(1)]), while at pH < 8.0, a weaker, shorter-lived species predominates. Unconventional Ln(III) emitters (Pr, Nd, Sm, Dy, and Tm) were sensitized in basic solution, both in the VIS and in the near-IR, to measure the emission of these ions.
描述了含有四个2-羟基苯甲酰胺基团的轮环藤宁衍生物H(4)L(1)·2 HBr的合成。L(1)（Ln = Gd、Tb、Yb和Eu）的Ln(III)配合物的光谱性质揭示了紫外/可见吸收、圆二色吸收、发光和圆偏振发光光谱的变化。结果表明，溶液中至少存在两种金属配合物物种，其相对含量取决于pH值。在pH > 8.0时，观察到强烈的长寿命发射（对于[TbL(1)]和[YbL(1)]），而在pH < 8.0时，较弱的、寿命较短的物种占主导。在碱性溶液中，对非常规的Ln(III)发光体（Pr、Nd、Sm、Dy和Tm）进行了敏化，以测量这些离子在可见光和近红外区域的发射。
Zotero 插件