Gold Nanocluster Functionalized with Peptide Dendron Thiolates: Acceleration of the Photocatalytic Oxidation of an Amino Alcohol in a Supramolecular Reaction Field
Gold Nanocluster Functionalized with Peptide Dendron Thiolates: Acceleration of the Photocatalytic Oxidation of an Amino Alcohol in a Supramolecular Reaction Field
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DOI：
10.1021/acscatal.1c03394
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发表时间：
2021-10
期刊：
影响因子：
12.9
通讯作者：
Katsuhiro Isozaki;Ryo Ueno;Kosuke Ishibashi;Genta Nakano;Haozhi Yin;Kenta Iseri;M. Sakamoto;
中科院分区：
文献类型：
--
作者：
Katsuhiro Isozaki;Ryo Ueno;Kosuke Ishibashi;Genta Nakano;Haozhi Yin;Kenta Iseri;M. Sakamoto;
在此，我们报道了由肽树突硫醇盐配体功能化的金纳米簇（AuNC）的合成，形成氢键超分子反应场。制备的 AuNCs 作为有效的光催化剂，促进氨基醇的氧化环化，得到恶唑烷产物。圆二色性(CD)光谱和1H NMR滴定实验表明，枝晶间氢键动态转变为配体与底物之间的分子间氢键是加速光催化反应的关键。这项工作引入了调整金属纳米簇催化剂的反应性和选择性的概念，该催化剂使用由树枝状硫醇盐配体创建的超分子反应场。
Herein, we report the synthesis of gold nanoclusters (AuNCs) functionalized by peptide dendron thiolate ligands forming a hydrogen bonding supramolecular reaction field. The prepared AuNCs act as efficient photocatalysts that promote the oxidative cyclization of an amino alcohol to afford the oxazolidine product. Circular dichroism (CD) spectroscopy and1H NMR titration experiments revealed that the dynamic transformation of interdendron hydrogen bonds into intermolecular hydrogen bonds between the ligand and the substrate is the key to accelerating the photocatalytic reaction. This work introduces a concept for tuning the reactivities and selectivities of metal nanocluster catalysts that use supramolecular reaction fields created with dendritic thiolate ligands.