Conductance switching and many-valued logic in porphyrin assemblies

Elise Y. Li*, Nicola Marzari

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


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 languageEnglish
Pages (from-to)3039-3044
Number of pages6
JournalJournal of Physical Chemistry Letters
Issue number18
Publication statusPublished - 2013 Sept 19


  • macrocycles
  • molecular electronics
  • molecular memory
  • quantum transport

ASJC Scopus subject areas

  • General Materials Science
  • Physical and Theoretical Chemistry


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