Controlling intramolecular hydrogen transfer in a porphycene molecule with single atoms or molecules located nearby
Artikel i vetenskaplig tidskrift, 2014

Although the local environment of a molecule can play an important role in its chemistry, rarely has it been examined experimentally at the level of individual molecules. Here we report the precise control of intramolecular hydrogen-transfer (tautomerization) reactions in single molecules using scanning tunnelling microscopy. By placing, with atomic precision, a copper adatom close to a porphycene molecule, we found that the tautomerization rates could be tuned up and down in a controlled fashion, surprisingly also at rather large separations. Furthermore, we extended our study to molecular assemblies in which even the arrangement of the pyrrolic hydrogen atoms in the neighbouring molecule influences the tautomerization reaction in a given porphycene, with positive and negative cooperativity effects. Our results highlight the importance of controlling the environment of molecules with atomic precision and demonstrate the potential to regulate processes that occur in a single molecule.

manipulation

conductance

derivatives

dynamics

phthalocyanine

electronics

tautomerism

surface

Författare

T. Kumagai

Max Planck-institutet

F. Hanke

University of Liverpool

Accelrys Limited, UK

S. Gawinkowski

Institute of Physical Chemistry of the Polish Academy of Sciences

J. Sharp

University of Liverpool

K. Kotsis

University of Liverpool

J. Waluk

Institute of Physical Chemistry of the Polish Academy of Sciences

Mats Persson

Chalmers, Teknisk fysik, Material- och ytteori

L. Grill

Max Planck-institutet

Karl-Franzens-Universität Graz

Nature Chemistry

1755-4330 (ISSN) 1755-4349 (eISSN)

Vol. 6 41-46

Ämneskategorier

Kemiteknik

DOI

10.1038/NCHEM.1804