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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.5b02121
|2 doi
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|a pubmed24n0835.xml
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|a eng
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|a Li, Feng
|e verfasserin
|4 aut
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|a Electron Transfer through Surface-Grown, Ferrocene-Capped Oligophenylene Molecular Wires (5-50 Å) on n-Si(111) Photoelectrodes
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|c 2015
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 24.09.2015
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|a Date Revised 21.07.2015
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a We report the surface growth of oligophenylene molecular wires on Si(111) substrates and their electron-transfer (ET) properties. Iterative wire growth of biphenylene was achieved via Pd-catalyzed Negishi reactions for lengths of nphenyl = 1, 2, 4, 6, 8, and 12 (d ≈ 5-50 Å). The triflato-capped wires were functionalized with vinylferrocene for potentiometric studies. For the oligophenylenes of nphenyl = 1, 2, and 4 (wire length d ≈ 5-20 Å), there was a strong distance dependence (kapp = 22.6, 16.0, 8.40 s(-1), respectively), correlated to β = 0.07 Å(-1). In contrast, longer oligophenylenes for nphenyl = 4-12 (d ≈ 20-50 Å) displayed a negligible distance dependence with an ET rate of kapp ≈ 10.0 ± 1.6 s(-1). These data suggest a distance-dependent tunneling mechanism at short lengths (d < 20 Å) and a distance-independent ET at longer lengths (d > 20 Å)
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|a Journal Article
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|a Basile, Victoria M
|e verfasserin
|4 aut
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|a Rose, Michael J
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 31(2015), 28 vom: 21. Juli, Seite 7712-6
|w (DE-627)NLM098181009
|x 1520-5827
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| 773 |
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|g volume:31
|g year:2015
|g number:28
|g day:21
|g month:07
|g pages:7712-6
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|u http://dx.doi.org/10.1021/acs.langmuir.5b02121
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