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Electrical characterisation of 7 nm long conjugated molecular wires: experimental and theoretical studies.

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Electrical characterisation of 7 nm long conjugated molecular wires: experimental and theoretical studies. / Wang, Changsheng; Batsanov, Andrei S.; Bryce, Martin R. et al.
In: Nanotechnology, Vol. 18, No. 4, 2007, p. 044005.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Wang, C, Batsanov, AS, Bryce, MR, Ashwell, GJ, Urasinska, B, Grace, I & Lambert, CJ 2007, 'Electrical characterisation of 7 nm long conjugated molecular wires: experimental and theoretical studies.', Nanotechnology, vol. 18, no. 4, pp. 044005. https://doi.org/10.1088/0957-4484/18/4/044005

APA

Wang, C., Batsanov, A. S., Bryce, M. R., Ashwell, G. J., Urasinska, B., Grace, I., & Lambert, C. J. (2007). Electrical characterisation of 7 nm long conjugated molecular wires: experimental and theoretical studies. Nanotechnology, 18(4), 044005. https://doi.org/10.1088/0957-4484/18/4/044005

Vancouver

Wang C, Batsanov AS, Bryce MR, Ashwell GJ, Urasinska B, Grace I et al. Electrical characterisation of 7 nm long conjugated molecular wires: experimental and theoretical studies. Nanotechnology. 2007;18(4):044005. doi: 10.1088/0957-4484/18/4/044005

Author

Wang, Changsheng ; Batsanov, Andrei S. ; Bryce, Martin R. et al. / Electrical characterisation of 7 nm long conjugated molecular wires: experimental and theoretical studies. In: Nanotechnology. 2007 ; Vol. 18, No. 4. pp. 044005.

Bibtex

@article{3a2d9b5c27ea48a585fb19cfa56ee120,
title = "Electrical characterisation of 7 nm long conjugated molecular wires: experimental and theoretical studies.",
abstract = "This article describes arylene–ethynylene molecular wires with 7 nm long backbones and thiolated termini. Cyclic voltammetric studies in solution reveal that the reduction waves of the fluorene, 9-[(4-pyridyl)methylene]fluorene and 9-[di(4-pyridyl)methylene]fluorene units which are embedded in the conjugated π-systems endow these wires with n-doping characteristics. An x-ray crystal structure investigation of 2,7-diiodo-9-[bis(4-pyridinium)methylene]fluorene bis(tetrafluoroborate) 8 established that protonation occurs on both nitrogens of this unit. Self-assembled monolayers of the 7 nm wire 2 on gold substrates exhibit symmetrical current–voltage (I–V) characteristics when contacted by a gold scanning transmission microscope (STM) tip. The dipyridyl functionality of 2 served to obtain a rectifying junction in which the diprotonated cationic wire is the electron accepting component in combination with an adjacent anionic phthalocyanine as the electron-donating layer. This ionic Au–2H22+[CuPc(SO3−)4(Na+)n]2/(4−n) bilayer assembly exhibits rectification with current ratios of 15–50 at ± 1 V. This dramatic change in I–V characteristics upon simple chemical manipulation proves that the conductivity is a property of the wire molecules 2 in the junction. Ab initio calculations suggest that the molecular wires possess useful structural features which allow the conductance of the molecule to be altered by changing the properties of the side groups attached to the fluorene units.",
author = "Changsheng Wang and Batsanov, {Andrei S.} and Bryce, {Martin R.} and Ashwell, {Geoffrey J.} and Barbara Urasinska and Iain Grace and Lambert, {Colin J.}",
year = "2007",
doi = "10.1088/0957-4484/18/4/044005",
language = "English",
volume = "18",
pages = "044005",
journal = "Nanotechnology",
issn = "1361-6528",
publisher = "IOP Publishing Ltd.",
number = "4",

}

RIS

TY - JOUR

T1 - Electrical characterisation of 7 nm long conjugated molecular wires: experimental and theoretical studies.

AU - Wang, Changsheng

AU - Batsanov, Andrei S.

AU - Bryce, Martin R.

AU - Ashwell, Geoffrey J.

AU - Urasinska, Barbara

AU - Grace, Iain

AU - Lambert, Colin J.

PY - 2007

Y1 - 2007

N2 - This article describes arylene–ethynylene molecular wires with 7 nm long backbones and thiolated termini. Cyclic voltammetric studies in solution reveal that the reduction waves of the fluorene, 9-[(4-pyridyl)methylene]fluorene and 9-[di(4-pyridyl)methylene]fluorene units which are embedded in the conjugated π-systems endow these wires with n-doping characteristics. An x-ray crystal structure investigation of 2,7-diiodo-9-[bis(4-pyridinium)methylene]fluorene bis(tetrafluoroborate) 8 established that protonation occurs on both nitrogens of this unit. Self-assembled monolayers of the 7 nm wire 2 on gold substrates exhibit symmetrical current–voltage (I–V) characteristics when contacted by a gold scanning transmission microscope (STM) tip. The dipyridyl functionality of 2 served to obtain a rectifying junction in which the diprotonated cationic wire is the electron accepting component in combination with an adjacent anionic phthalocyanine as the electron-donating layer. This ionic Au–2H22+[CuPc(SO3−)4(Na+)n]2/(4−n) bilayer assembly exhibits rectification with current ratios of 15–50 at ± 1 V. This dramatic change in I–V characteristics upon simple chemical manipulation proves that the conductivity is a property of the wire molecules 2 in the junction. Ab initio calculations suggest that the molecular wires possess useful structural features which allow the conductance of the molecule to be altered by changing the properties of the side groups attached to the fluorene units.

AB - This article describes arylene–ethynylene molecular wires with 7 nm long backbones and thiolated termini. Cyclic voltammetric studies in solution reveal that the reduction waves of the fluorene, 9-[(4-pyridyl)methylene]fluorene and 9-[di(4-pyridyl)methylene]fluorene units which are embedded in the conjugated π-systems endow these wires with n-doping characteristics. An x-ray crystal structure investigation of 2,7-diiodo-9-[bis(4-pyridinium)methylene]fluorene bis(tetrafluoroborate) 8 established that protonation occurs on both nitrogens of this unit. Self-assembled monolayers of the 7 nm wire 2 on gold substrates exhibit symmetrical current–voltage (I–V) characteristics when contacted by a gold scanning transmission microscope (STM) tip. The dipyridyl functionality of 2 served to obtain a rectifying junction in which the diprotonated cationic wire is the electron accepting component in combination with an adjacent anionic phthalocyanine as the electron-donating layer. This ionic Au–2H22+[CuPc(SO3−)4(Na+)n]2/(4−n) bilayer assembly exhibits rectification with current ratios of 15–50 at ± 1 V. This dramatic change in I–V characteristics upon simple chemical manipulation proves that the conductivity is a property of the wire molecules 2 in the junction. Ab initio calculations suggest that the molecular wires possess useful structural features which allow the conductance of the molecule to be altered by changing the properties of the side groups attached to the fluorene units.

U2 - 10.1088/0957-4484/18/4/044005

DO - 10.1088/0957-4484/18/4/044005

M3 - Journal article

VL - 18

SP - 044005

JO - Nanotechnology

JF - Nanotechnology

SN - 1361-6528

IS - 4

ER -