Chelation-enhanced circular dichroism of tripodal bisporphyrin ligands
Chelation-enhanced circular dichroism of tripodal bisporphyrin ligands
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DOI：
10.1021/ja0666147
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发表时间：
2007-02-14
影响因子：
15
通讯作者：
Canary, James W.
中科院分区：
文献类型：
--
作者：
Holmes, Andrea E.;Das, Debasis;Canary, James W.
描述了一种由伯胺容易制备的手性三足配体，其含有两个单取代的四苯基卟啉（TPP）部分。在 NH4SCN 存在下与 Cu(II) 络合得到完全金属化的卟啉和三足配体络合物。游离配体显示出弱的圆二色性 (CD) 信号，但金属化给出了强的激子耦合 CD 光谱。 Cu(II) 络合物的还原导致 CD 信号丢失。
A chiral tripodal ligand readily prepared from primary amines that contains two monosubstituted tetraphenylporphyrin (TPP) moieties is described. Complexation with Cu(II) in the presence of NH4SCN gives a fully metalated porphyrin and tripoda l ligand complex. The free ligand shows a weak circular dichroism (CD) signal, but metalation gives a strong exciton-coupled CD spectrum. Reduction of the Cu(II) complex results in loss of CD signal.