title: Atomic-Scale Insight into Tautomeric Recognition, Separation, and Interconversion of Guanine Molecular Networks on Au(111).
abstract: Although tautomerization may directly affect the chemical or biological properties of molecules, real-space investigation on the tautomeric behaviors of organic molecules in a larger area of molecular networks has been scarcely reported. In this paper, we choose guanine (G) molecule as a model system. From the interplay of high-resolution scanning tunneling microscopy (STM) imaging and density functional theory (DFT) calculations, we have successfully achieved the tautomeric recognition, separation, and interconversion of G molecular networks (formed by two tautomeric forms G/9H and G/7H) with the aid of NaCl on the Au(111) surface in ultrahigh vacuum (UHV) conditions. Our results may serve as a prototypical system to provide important insights into tautomerization related issues, which should be intriguing to biochemistry, pharmaceutics, and other related fields.
authors: Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University , Caoan Road 4800, Shanghai 201804, People's Republic of China.
authors: Chi
authors: C
authors: Zhang
authors: Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University , Caoan Road 4800, Shanghai 201804, People's Republic of China.
authors: Lei
authors: L
authors: Xie
authors: Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University , Caoan Road 4800, Shanghai 201804, People's Republic of China.
authors: Likun
authors: L
authors: Wang
authors: Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University , Caoan Road 4800, Shanghai 201804, People's Republic of China.
authors: Huihui
authors: H
authors: Kong
authors: Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University , Caoan Road 4800, Shanghai 201804, People's Republic of China.
authors: Qinggang
authors: Q
authors: Tan
authors: Tongji-Aarhus Joint Research Center for Nanostructures and Functional Nanomaterials, College of Materials Science and Engineering, Tongji University , Caoan Road 4800, Shanghai 201804, People's Republic of China.
authors: Wei
authors: W
authors: Xu
mesh_terms: D006046:Gold / Q000737:chemistry*; D006147:Guanine / Q000737:chemistry*; D016252:Microscopy, Scanning Tunneling; D013237:Stereoisomerism
chemical_list: D006147:Guanine; D006046:Gold