Conductance switching and many-valued logic in porphyrin assemblies

Elise Y. Li; Nicola Marzari

doi:10.1021/jz401649a

Conductance switching and many-valued logic in porphyrin assemblies

Elise Y. Li^*, Nicola Marzari

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

We investigate quantum interference in the transport properties of porphyrin-based molecular devices, and are able to develop a minimal but qualitatively accurate model of conductance based on the maximally localized Wannier functions of just the isolated molecule. We find that transmission at or near the Fermi level can be engineered to vary by orders of magnitude in response to hydrogen tautomerization in the inner ring, a recently developed experimental capability. This allows us to suggest that tape porphyrins can act as molecular-size memory units, displaying many-valued logic.

Original language	English
Pages (from-to)	3039-3044
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	4
Issue number	18
DOIs	https://doi.org/10.1021/jz401649a
Publication status	Published - 2013 Sept 19

Keywords

macrocycles
molecular electronics
molecular memory
quantum transport

ASJC Scopus subject areas

Materials Science(all)
Physical and Theoretical Chemistry

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10.1021/jz401649a

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AB - We investigate quantum interference in the transport properties of porphyrin-based molecular devices, and are able to develop a minimal but qualitatively accurate model of conductance based on the maximally localized Wannier functions of just the isolated molecule. We find that transmission at or near the Fermi level can be engineered to vary by orders of magnitude in response to hydrogen tautomerization in the inner ring, a recently developed experimental capability. This allows us to suggest that tape porphyrins can act as molecular-size memory units, displaying many-valued logic.

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KW - molecular memory

KW - quantum transport

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Conductance switching and many-valued logic in porphyrin assemblies

Abstract

Keywords

ASJC Scopus subject areas

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