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Electrochemical Gate-Controlled Conductance of Single Oligo(phenylene ethynylene)s
Abstract
We have studied electron transport properties of unsubstituted oligo(phenylene ethynylene) (OPE) (1) and nitro-substituted OPE (2) covalently bound to two gold electrodes. The conductance values of single 1 and 2 are approximately 13 and approximately 6 nS, respectively. In addition to a decrease in the conductance, the presence of the nitro moiety leads to asymmetric I-V characteristics and a negative differential resistance-like (NDR-like) behavior. We have altered the nitro-substituted OPE by electrochemically reducing the nitro group and by varying the pH of the electrolyte. The conductance decreases linearly with the electron-withdrawing capability (i.e., Hammett substituent values) of the corresponding reduced species. In contrast, the conductance of 1 is independent of the pH and the electrode potential.
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Cited by
Molecular transport junctions: vibrational effects
Galperin, M., Ratner, M. A., & Nitzan, A. (2007) · Journal of Physics: Condensed Matter · doi:10.1088/0953-8984/19/10/103201 · Cited by 771
Metzger, R. M. (2015) · Chemical Reviews · doi:10.1021/cr500459d · Cited by 380
Li, T., Hu, W., & Zhu, D. (2010) · Advanced Materials · doi:10.1002/adma.200900864 · Cited by 269
Yuan, W. Z., Hu, R., Lam, J. W. Y., Xie, N., Jim, C. K. W., & Tang, B. Z. (2012) · Chemistry – A European Journal · doi:10.1002/chem.201103151 · Cited by 62
Metadata
- Authors
- Xiao, X., Nagahara, L. A., Rawlett, A. M., & Tao, N.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-06-01
- Volume
- 127
- Issue
- 25
- Pages
- 9235-9240
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W1977659398
- Cited by
- 238
- References
- 0
- FWCI
- 19.70
- Type
- journal article
- Language
- en
- Open access
- closed
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