Nanographene with a Nitrogen‐Doped Cavity

Author:

Wang Fei‐Fan1,Wang Yu‐Xiang1,Wu Qiong1,Chai Ling1,Chen Xuan‐Wen1,Tan Yuan‐Zhi1ORCID

Affiliation:

1. State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China

Abstract

AbstractNitrogen‐doped cavities are pervasive in graphenic materials, and represent key sites for catalytic and electrochemical activity. However, their structures are generally heterogeneous. In this study, we present the synthesis of a well‐defined molecular cutout of graphene featuring N‐doped cavity. The graphitization of a macrocyclic pyridinic precursor was achieved through photochemical cyclodehydrochlorination. In comparison to its counterpart with pyridinic nitrogen at the edges, the pyridinic nitrogen atoms in this nanographene cavity exhibit significantly reduced basicity and selective binding to Ag+ ion. Analysis of the protonation and coordination equilibria revealed that the tri‐N‐doped cavity binds three protons, but only one Ag+ ion. These distinct protonation and coordination behaviors clearly illustrate the space confinement effect imparted by the cavities.

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

General Medicine

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