Rights statement: This is the peer reviewed version of the following article: Jiang, F., Trupp, D.I., Algethami, N., Zheng, H., He, W., Alqorashi, A., Zhu, C., Tang, C., Li, R., Liu, J., Sadeghi, H., Shi, J., Davidson, R., Korb, M., Sobolev, A.N., Naher, M., Sangtarash, S., Low, P.J., Hong, W. and Lambert, C.J. (2019), Turning the Tap: Conformational Control of Quantum Interference to Modulate Single‐Molecule Conductance. Angew. Chem. Int. Ed.. doi:10.1002/anie.201909461 which has been published in final form at https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201909461 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Turning the Tap
T2 - Conformational Control of Quantum Interference to Modulate Single-Molecule Conductance
AU - Jiang, F.
AU - Trupp, D.I.
AU - Algethami, N.
AU - Zheng, H.
AU - He, W.
AU - Alqorashi, A.
AU - Zhu, C.
AU - Tang, C.
AU - Li, R.
AU - Liu, J.
AU - Sadeghi, H.
AU - Shi, J.
AU - Davidson, R.
AU - Korb, M.
AU - Sobolev, A.N.
AU - Naher, M.
AU - Sangtarash, S.
AU - Low, P.J.
AU - Hong, W.
AU - Lambert, C.J.
N1 - This is the peer reviewed version of the following article: Jiang, F., Trupp, D.I., Algethami, N., Zheng, H., He, W., Alqorashi, A., Zhu, C., Tang, C., Li, R., Liu, J., Sadeghi, H., Shi, J., Davidson, R., Korb, M., Sobolev, A.N., Naher, M., Sangtarash, S., Low, P.J., Hong, W. and Lambert, C.J. (2019), Turning the Tap: Conformational Control of Quantum Interference to Modulate Single‐Molecule Conductance. Angew. Chem. Int. Ed.. doi:10.1002/anie.201909461 which has been published in final form at https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201909461 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
PY - 2019/12/19
Y1 - 2019/12/19
N2 - Together with the more intuitive and commonly recognized conductance mechanisms of charge-hopping and tunneling, quantum-interference (QI) phenomena have been identified as important factors affecting charge transport through molecules. Consequently, establishing simple and flexible molecular-design strategies to understand, control, and exploit QI in molecular junctions poses an exciting challenge. Here we demonstrate that destructive quantum interference (DQI) in meta-substituted phenylene ethylene-type oligomers (m-OPE) can be tuned by changing the position and conformation of methoxy (OMe) substituents at the central phenylene ring. These substituents play the role of molecular-scale taps, which can be switched on or off to control the current flow through a molecule. Our experimental results conclusively verify recently postulated magic-ratio and orbital-product rules, and highlight a novel chemical design strategy for tuning and gating DQI features to create single-molecule devices with desirable electronic functions.
AB - Together with the more intuitive and commonly recognized conductance mechanisms of charge-hopping and tunneling, quantum-interference (QI) phenomena have been identified as important factors affecting charge transport through molecules. Consequently, establishing simple and flexible molecular-design strategies to understand, control, and exploit QI in molecular junctions poses an exciting challenge. Here we demonstrate that destructive quantum interference (DQI) in meta-substituted phenylene ethylene-type oligomers (m-OPE) can be tuned by changing the position and conformation of methoxy (OMe) substituents at the central phenylene ring. These substituents play the role of molecular-scale taps, which can be switched on or off to control the current flow through a molecule. Our experimental results conclusively verify recently postulated magic-ratio and orbital-product rules, and highlight a novel chemical design strategy for tuning and gating DQI features to create single-molecule devices with desirable electronic functions.
KW - density functional calculations
KW - destructive quantum interference
KW - scanning tunnelling microscope break junction
KW - single-molecule studies
U2 - 10.1002/anie.201909461
DO - 10.1002/anie.201909461
M3 - Journal article
VL - 58
SP - 18987
EP - 18993
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 52
ER -