Concentration- and Time-Dependent Eccentric Changes in Circular Dichroism of Saccharide-Linked Ethynylpyridine Oligomer with Copper(II) Ions
Concentration- and Time-Dependent Eccentric Changes in Circular Dichroism of Saccharide-Linked Ethynylpyridine Oligomer with Copper(II) Ions
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铜 (II) 离子糖连接乙炔基吡啶低聚物圆二色性的浓度和时间依赖性偏心变化
DOI：
10.1021/jo300735j
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
M
中科院分区：
文献类型：
--
作者：
Abe;H.;Ohishi;Y.;and Inouye;M
我们研究了与带有 C20 亚烷基链的 β-d-葡萄糖苷部分连接的 2,6-吡啶亚乙炔基八聚低聚物的制备和圆二色性 (CD) 行为。 Cu(OTf)2盐的添加导致寡聚物的第一CD带显着增强，并且观察到意想不到的浓度和时间依赖性。例如，当将1.0×10-3M的Cu(OTf)2添加到低聚物的1,2-二氯乙烷溶液（5.0×10-4M，单位浓度）中时，CD带首先出现在阳性，并随着时间的推移逐渐反转为阴性。
We studied the preparation and circular dichroism (CD) behavior of 2,6-pyridylene ethynylene octameric oligomer linked to a β-d-glucoside moiety with a C20-alkylene chain. The addition of Cu(OTf)2salt led to a remarkable enhancement of the first CD band of the oligomer, and an unexpected concentration and time dependency were observed. For example, when 1.0 × 10–3M of Cu(OTf)2was added to a 1,2-dichloroethane solution of the oligomer (5.0 × 10–4M, unit concentration), the CD band appeared in the positive at first and gradually inverted into the negative with time.