First-principles study of 2,6-dimethyl-3,5-heptanedione: a β-diketone molecular switch induced by hydrogen transfer


In this research, using nonequilibrium green’s function integrated with density functional theory, we investigate the electronic transport properties of a β-diketone (2,6-dimethyl-3,5-heptanedione) molecular wire induced by hydrogen transfer. The title molecule can be converted between two enol and keto forms. The electronic transmission factors, spatial spreading of molecular projected self-consistent Hamiltonian orbitals, onoff ratio, IV characteristics, three different adsorption types (hollow, top, and bridge), the alteration of the electrode materials, Y, (Y = Au, Ag, and Pt), and HOMO–LUMO gaps relevant to these forms are thoroughly discussed. It can be concluded that due to the deformation of the title molecule (enol → keto), there is a noticeable change in conductivity. As a result of this deformation, the conductivity is switched from on state (high conductivity and low resistance) to off state (low conductivity and high resistance).

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Authors are grateful to the Ferdowsi University of Mashhad for financial support.

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Sayyar, Z., Vakili, M., Kanaani, A. et al. First-principles study of 2,6-dimethyl-3,5-heptanedione: a β-diketone molecular switch induced by hydrogen transfer. J Comput Electron 19, 917–930 (2020).

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  • Electronic transport
  • β-Diketone
  • Hydrogen transfer