A [Cyclentetrakis(methylene)]tetrakis[2-hydroxybenzamide] Ligand That Complexes and Sensitizes Lanthanide(III) Ions.
A [Cyclentetrakis(methylene)]tetrakis[2-hydroxybenzamide] Ligand That Complexes and Sensitizes Lanthanide(III) Ions.
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一种[环四（亚甲基）]四[2-羟基苯甲酰胺]配体，可络合并敏化镧系元素 (III) 离子。
DOI：
10.1002/hlca.200900161
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发表时间：
2009
影响因子：
1.8
通讯作者：
Raymond,KennethN
中科院分区：
文献类型：
--
作者：
D'Aléo,Anthony;Xu,Jide;Do,King;Muller,Gilles;Raymond,KennethN
报道了含4个2-羟基苯甲酰胺基团的大环草胺衍生物H4 L1 - 2 HBr的合成。L1（Ln=Gd，Tb，Yb，Eu）的LnIII配合物的光谱性质显示了UV/维斯-吸收、圆二色性吸收、发光和圆偏振发光光谱的变化。结果表明，溶液中存在至少两种金属络合物，其相对量取决于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，较弱的短寿命物质占主导地位。非常规的Ln III发射体（Pr、Nd、Sm、Dy和Tm）在碱性溶液中在维斯和近红外中被敏化，以测量这些离子的发射。
The synthesis of the cyclen derivative H4L1⋅2 HBr containing four 2‐hydroxybenzamide groups is described. The spectroscopic properties of the LnIIIconplexes ofL1(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 [TbL1] and [YbL1]), while at pH<8.0, a weaker, shorter‐lived species predominates. Unconventional LnIIIemitters (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.