TY - JOUR
T1 - Mechanical Tuning of Through-Molecule Conductance in a Conjugated Calix[4]pyrrole
AU - Stefani, Davide
AU - Perrin, Mickael
AU - Gutiérrez-Cerón, Cristian
AU - Aragonès, Albert C.
AU - Labra-Muñoz, Jacqueline
AU - Carrasco, Rodrigo D.C.
AU - Matsushita, Yoshitaka
AU - Futera, Zdenek
AU - Labuta, Jan
AU - Ngo, Thien H.
AU - Ariga, Katsuhiko
AU - Díez-Pérez, Ismael
AU - van der Zant, Herre S.J.
AU - Dulić, Diana
AU - Hill, Jonathan P.
N1 - Accepted Author Manuscript
PY - 2018
Y1 - 2018
N2 - A conformationally flexible calix[4]pyrrole possessing a conjugated electronic structure (an N-substituted oxoporphyrinogen (OxP) related to porphyrin) was used to investigate the influence of mechanical stretching on the single-molecule conductance of these molecules using the mechanically-controlled break junction (MCBJ) technique. The results show that the molecule can be immobilized in a single-molecule break junction configuration, giving rise to different behaviours. These include step-like features in the conductance vs. displacement traces as well as conductance traces that exhibit a slower decay (‘downhill’ traces) than measured for direct tunneling. The latter class of traces can be associated with the mechanical manipulation (i. e., stretching) of the molecule with inter-electrode distances as long as 2 nm. Density functional theory (DFT) calculations reveal that OxP molecules are stable under stretching in the length regime studied.
AB - A conformationally flexible calix[4]pyrrole possessing a conjugated electronic structure (an N-substituted oxoporphyrinogen (OxP) related to porphyrin) was used to investigate the influence of mechanical stretching on the single-molecule conductance of these molecules using the mechanically-controlled break junction (MCBJ) technique. The results show that the molecule can be immobilized in a single-molecule break junction configuration, giving rise to different behaviours. These include step-like features in the conductance vs. displacement traces as well as conductance traces that exhibit a slower decay (‘downhill’ traces) than measured for direct tunneling. The latter class of traces can be associated with the mechanical manipulation (i. e., stretching) of the molecule with inter-electrode distances as long as 2 nm. Density functional theory (DFT) calculations reveal that OxP molecules are stable under stretching in the length regime studied.
KW - calix[4]pyrrole
KW - mechanically-controlled break junction
KW - oxoporphyrinogen
KW - single molecule
UR - http://resolver.tudelft.nl/uuid:846eeacc-4e5d-4ac1-85e2-cd67f3abcc7d
UR - http://www.scopus.com/inward/record.url?scp=85048937756&partnerID=8YFLogxK
U2 - 10.1002/slct.201801076
DO - 10.1002/slct.201801076
M3 - Article
AN - SCOPUS:85048937756
VL - 3
SP - 6473
EP - 6478
JO - ChemistrySelect
JF - ChemistrySelect
SN - 2365-6549
IS - 23
ER -