Quenching of the Photoisomerization of Azobenzene Self-Assembled Monolayers by the Metal Substrate

Enrico Benassi, Stefano Corni

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

In this study, we aim at investigating the role played by the metal surface as a possible dissipative channel in the photoisomerization process of azobenzene-derivative-based self-assembled monolayers (azo-SAMs). In particular we compare the cases of gold and platinum. We study the excitonic transfer phenomena of two azo-derivatives (both in trans and in cis conformation) chemisorbed on Au{111} and Pt{111} to the metal surfaces. The metal effects are evaluated within the local and nonlocal regimes, showing that nonlocality in the metal response plays an important role and nonlocal accounting quenching rates are one order of magnitude smaller than the corresponding local results. The couplings are stronger for Au{111} than for Pt{111}, but for both cases the energy transfer between the molecule and the metal turns out not to be able to suppress photoisomerization.

Original languageEnglish
Pages (from-to)25906-25917
Number of pages12
JournalJournal of Physical Chemistry C
Volume118
Issue number45
DOIs
Publication statusPublished - 13 Nov 2014
Externally publishedYes

Fingerprint

Photoisomerization
Azobenzene
Self assembled monolayers
Quenching
Metals
quenching
metal surfaces
Substrates
metals
Derivatives
platinum
energy transfer
gold
Platinum
Gold
Energy transfer
Conformations
azobenzene
molecules
Molecules

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Quenching of the Photoisomerization of Azobenzene Self-Assembled Monolayers by the Metal Substrate. / Benassi, Enrico; Corni, Stefano.

In: Journal of Physical Chemistry C, Vol. 118, No. 45, 13.11.2014, p. 25906-25917.

Research output: Contribution to journalArticle

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