Structure-property relationships in redox-gated single molecule junctions - A comparison of pyrrolo-tetrathiafulvalene and viologen redox groups

E. Leary; S.J. Higgins; H. van Zalinge; W. Haiss; Richard John Nichols; Sune Nygaard; Jan Oskar Jeppesen; Jens Ulstrup

doi:10.1021/ja8014605

Structure-property relationships in redox-gated single molecule junctions - A comparison of pyrrolo-tetrathiafulvalene and viologen redox groups

E. Leary, S.J. Higgins, H. van Zalinge, W. Haiss, Richard John Nichols, Sune Nygaard, Jan Oskar Jeppesen, Jens Ulstrup

Department of Chemistry

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We demonstrate that the electrical 'switching" behavior of single molecules connected between two electrode contacts can be controlled by altering their structure and electrochemical characteristics. The electrical properties of gold vertical bar molecule vertical bar gold single molecule junctions incorporating HS(CH2)(6)-X-(CH2)(6)SH, where X = viologen (4,4'-bipyridinium) or pyrrolotetrathiafulvalene, are determined using a scanning tunneling microscopy based technique. The switching behavior, controlled through a tuneable electrochemical gate, changes from an on-off response (viologen) to an off-on-off response (pyrrolotetrathiafulvalene) on changing the central redox group. In contrast, the electrical properties of junctions incorporating redox-inactive HS(CH2)(6)-1,4-C6H4-(CH2)(6)SH do not alter significantly as a function of applied potential.

Original language	English
Journal	Journal of the American Chemical Society
Volume	130
Issue number	37
Pages (from-to)	12204
ISSN	0002-7863
DOIs	https://doi.org/10.1021/ja8014605
Publication status	Published - 2008

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@article{28ed4d2b4e844a128636b223b255008f,

title = "Structure-property relationships in redox-gated single molecule junctions - A comparison of pyrrolo-tetrathiafulvalene and viologen redox groups",

abstract = "We demonstrate that the electrical 'switching{"} behavior of single molecules connected between two electrode contacts can be controlled by altering their structure and electrochemical characteristics. The electrical properties of gold vertical bar molecule vertical bar gold single molecule junctions incorporating HS(CH2)(6)-X-(CH2)(6)SH, where X = viologen (4,4'-bipyridinium) or pyrrolotetrathiafulvalene, are determined using a scanning tunneling microscopy based technique. The switching behavior, controlled through a tuneable electrochemical gate, changes from an on-off response (viologen) to an off-on-off response (pyrrolotetrathiafulvalene) on changing the central redox group. In contrast, the electrical properties of junctions incorporating redox-inactive HS(CH2)(6)-1,4-C6H4-(CH2)(6)SH do not alter significantly as a function of applied potential.",

author = "E. Leary and S.J. Higgins and {van Zalinge}, H. and W. Haiss and Nichols, {Richard John} and Sune Nygaard and Jeppesen, {Jan Oskar} and Jens Ulstrup",

year = "2008",

doi = "10.1021/ja8014605",

language = "English",

volume = "130",

pages = "12204",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

publisher = "ACS Publications",

number = "37",

}

Structure-property relationships in redox-gated single molecule junctions - A comparison of pyrrolo-tetrathiafulvalene and viologen redox groups. / Leary, E.; Higgins, S.J.; van Zalinge, H.; Haiss, W.; Nichols, Richard John; Nygaard, Sune; Jeppesen, Jan Oskar; Ulstrup, Jens.

In: Journal of the American Chemical Society, Vol. 130, No. 37, 2008, p. 12204.

Research output: Contribution to journal › Journal article › Research › peer-review

TY - JOUR

T1 - Structure-property relationships in redox-gated single molecule junctions - A comparison of pyrrolo-tetrathiafulvalene and viologen redox groups

AU - Leary, E.

AU - Higgins, S.J.

AU - van Zalinge, H.

AU - Haiss, W.

AU - Nichols, Richard John

AU - Nygaard, Sune

AU - Jeppesen, Jan Oskar

AU - Ulstrup, Jens

PY - 2008

Y1 - 2008

N2 - We demonstrate that the electrical 'switching" behavior of single molecules connected between two electrode contacts can be controlled by altering their structure and electrochemical characteristics. The electrical properties of gold vertical bar molecule vertical bar gold single molecule junctions incorporating HS(CH2)(6)-X-(CH2)(6)SH, where X = viologen (4,4'-bipyridinium) or pyrrolotetrathiafulvalene, are determined using a scanning tunneling microscopy based technique. The switching behavior, controlled through a tuneable electrochemical gate, changes from an on-off response (viologen) to an off-on-off response (pyrrolotetrathiafulvalene) on changing the central redox group. In contrast, the electrical properties of junctions incorporating redox-inactive HS(CH2)(6)-1,4-C6H4-(CH2)(6)SH do not alter significantly as a function of applied potential.

AB - We demonstrate that the electrical 'switching" behavior of single molecules connected between two electrode contacts can be controlled by altering their structure and electrochemical characteristics. The electrical properties of gold vertical bar molecule vertical bar gold single molecule junctions incorporating HS(CH2)(6)-X-(CH2)(6)SH, where X = viologen (4,4'-bipyridinium) or pyrrolotetrathiafulvalene, are determined using a scanning tunneling microscopy based technique. The switching behavior, controlled through a tuneable electrochemical gate, changes from an on-off response (viologen) to an off-on-off response (pyrrolotetrathiafulvalene) on changing the central redox group. In contrast, the electrical properties of junctions incorporating redox-inactive HS(CH2)(6)-1,4-C6H4-(CH2)(6)SH do not alter significantly as a function of applied potential.

U2 - 10.1021/ja8014605

DO - 10.1021/ja8014605

M3 - Journal article

C2 - 18722447

VL - 130

SP - 12204

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

SN - 0002-7863

IS - 37

ER -