Chiral Carbon Dots Derived from Serine with Well-Defined Structure and Enantioselective Catalytic Activity,Nano Letters

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Chiral Carbon Dots Derived from Serine with Well-Defined Structure and Enantioselective Catalytic Activity
Nano Letters ( IF 9.6 ) Pub Date : 2022-08-24 , DOI: 10.1021/acs.nanolett.2c02674
Mengling Zhang _{1,

2} , Wanru Zhang ₃ , Xing Fan ₁ , Yurong Ma ₁ , Hui Huang ₁ , Xiting Wang ₁ , Yang Liu ₁ , Haiping Lin ₄ , Youyong Li _{1,

2} , He Tian ₃ , Mingwang Shao ₁ , Zhenhui Kang _{1,

2}

Affiliation

Carbon dots (C-Dots), with unique properties from tunable photoluminescence to biocompatibility, show wide applications in biotechnology, optoelectronic device and catalysis. Chiral C-Dots are expected to have strongly chirality-dependent biological and catalytic properties. For chiral C-Dots, a clear structure and quantitative structure–property relationship need to be clarified. Here, chiral C-Dots were fabricated by electrooxidation polymerization from serine enantiomers. The oxidized serine has a reversed chiral configuration to serine, which leads to the chiral C-Dots possessing inverse handedness compared with their raw materials. Electron circular dichroism spectrum, together with other diverse characterization techniques and theoretical calculations, confirmed that these chiral C-Dots (2–7 nm) have a well-defined primary structure of polycyclic dipeptide and possess a spatial structure with a c-axis of hexagonal symmetry and two cyclic dipeptides as the spatial structural unit. These chiral C-Dots also show enantioselective catalytic activity on DOPA enantiomers oxidation.

中文翻译：

具有明确结构和对映选择性催化活性的丝氨酸手性碳点

碳点 (C-Dots) 具有从可调谐光致发光到生物相容性的独特特性，在生物技术、光电器件和催化领域具有广泛的应用。预计手性 C 点具有强烈的手性依赖性生物学和催化特性。对于手性 C-Dots，需要阐明清晰的结构和定量的结构-性质关系。在这里，手性碳点是通过丝氨酸对映异构体的电氧化聚合制备的。氧化后的丝氨酸与丝氨酸具有相反的手性构型，导致手性C-Dots与其原料相比具有逆手性。电子圆二色光谱，连同其他多种表征技术和理论计算，c - 六角对称轴和两个环状二肽作为空间结构单元。这些手性碳点还显示出对多巴对映异构体氧化的对映选择性催化活性。

更新日期：2022-08-24

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