New amino acid ligated yttrium hydroxy clusters.
New amino acid ligated yttrium hydroxy clusters.
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DOI：
10.1039/c001464h
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发表时间：
2010-07
影响因子：
4
通讯作者：
D. Thielemann;I. Fernández;P. Roesky
中科院分区：
文献类型：
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作者：
D. Thielemann;I. Fernández;P. Roesky
报道了四种混合五核钇羟基簇 [Y(5)(OH)(5)(α-AA)(4)(Ph(2)acac)(6)]（α-AA = D-苯基甘氨酸、L-脯氨酸、L-缬氨酸和 L-色氨酸；Ph(2)acac = 二苯甲酰甲烷）的合成。所有化合物的固态结构均通过单晶X射线衍射建立。在这些对映体纯的手性簇中，二苯甲酰甲烷和氨基酸配体容纳在钇原子的配位球中。测定了所有四种化合物的比旋光度。已在一个模型簇上进行了作为浓度函数的 PGSE NMR 扩散测量，证明这些分子在氯仿溶液中易于聚集。
The synthesis of the four mixed pentanuclear yttrium hydroxy clusters [Y(5)(OH)(5)(alpha-AA)(4)(Ph(2)acac)(6)] (alpha-AA = D-phenyl glycine, L-proline, L-valine, and L-tryptophan; Ph(2)acac = dibenzoylmethanide) is reported. The solid state structures of all compounds were established by single crystal X-ray diffraction. In these enantiomerically pure chiral clusters the dibenzoylmethanide and amino acid ligands are accommodated in the coordination spheres of the yttrium atoms. The specific optical rotations of all four compounds were determined. PGSE NMR diffusion measurements as function of concentration have been carried out on one model cluster, proving these molecules to be prone to aggregation in chloroform solutions.