• 文献标题:   Structure and Properties of Double-Sandwich Complexes at the Graphene Surface: A Theoretical Study
  • 文献类型:   Article
  • 作  者:   MIRIYALA VM, LO R, HALDAR S, SARMAH A, HOBZA P
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF PHYSICAL CHEMISTRY C
  • ISSN:   1932-7447 EI 1932-7455
  • 通讯作者地址:   Czech Acad Sci
  • 被引频次:   0
  • DOI:   10.1021/acs.jpcc.8b11867
  • 出版年:   2019

▎ 摘  要

Graphene and its derivatives are useful building blocks for the bottom-up assembly of advanced functional materials. Noncovalently functionalized graphene networks offer a wide range of applications. We investigated the formation of sandwich-like three-layered nanostructures with graphene. Novel architectures have been generated by stacking selected suitable organic molecules based on their characterized donor and acceptor strengths vertically on the graphene surface. This paper describes the adsorption of electron-acceptor and electron-donor molecules on the graphene layer through noncovalent interactions. Cluster and crystal models of the graphene surface have been selected to design sandwich-like two-layered and three-layered structures, and their stabilities have been verified using density functional theory calculations. Further, stability of the complexes has been confirmed on the basis of factors such as interaction energy and charge transfer. The stability of the macrostructures has been tested by metadynamics simulations. We have found that the most stable complex C4 center dot center dot center dot HAT-CN center dot center dot center dot TAB prefers the double-sandwich state over the dissociated state.