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    Rights statement: This is the peer reviewed version of the following article: M. Baghernejad, Y. Yang, O. A. Al-Owaedi, Y. Aeschi, B.-F. Zeng, Z. M. Abd Dawood, X. Li, J. Liu, J. Shi, S. Decurtins, S.-X. Liu, W. Hong, C. J. Lambert, Chem. Eur. J. 2020, 26, 5264 which has been published in final form at https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/chem.201905878 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.

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    Embargo ends: 31/03/21

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

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Constructive Quantum Interference in Single-Molecule Benzodichalcogenophene Junctions

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<mark>Journal publication date</mark>21/04/2020
<mark>Journal</mark>Chemistry - A European Journal
Issue number23
Volume26
Number of pages7
Pages (from-to)5264-5269
Publication StatusPublished
Early online date31/03/20
<mark>Original language</mark>English

Abstract

Heteroatom substitution into the cores of alternant, aromatic hydrocarbons containing only even-membered rings is attracting increasing interest as a method of tuning their electrical conductance. Here, the effect of heteroatom substitution into molecular cores of non-alternant hydrocarbons, containing odd-membered rings, is examined. Benzodichalcogenophene (BDC) compounds are rigid, planar pi-conjugated structures, with molecular cores containing five-membered rings fused to a six-membered aryl ring. To probe the sensitivity or resilience of constructive quantum interference (CQI) in these non-bipartite molecular cores, two C-2-symmetric molecules (I and II) and one asymmetric molecule (III) were investigated. I (II) contains S (O) heteroatoms in each of the five-membered rings, while III contains an S in one five-membered ring and an O in the other. Differences in their conductances arise primarily from the longer S-C and shorter O-C bond lengths compared with the C-C bond and the associated changes in their resonance integrals. Although the conductance of III is significantly lower than the conductances of the others, CQI was found to be resilient and persist in all molecules.

Bibliographic note

This is the peer reviewed version of the following article: M. Baghernejad, Y. Yang, O. A. Al-Owaedi, Y. Aeschi, B.-F. Zeng, Z. M. Abd Dawood, X. Li, J. Liu, J. Shi, S. Decurtins, S.-X. Liu, W. Hong, C. J. Lambert, Chem. Eur. J. 2020, 26, 5264 which has been published in final form at https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/chem.201905878 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.