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231223s2009 xx |||||o 00| ||eng c |
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|a 10.1021/la8025792
|2 doi
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|a pubmed24n0617.xml
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|a eng
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|a Combellas, Catherine
|e verfasserin
|4 aut
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|a Steric effects in the reaction of aryl radicals on surfaces
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|c 2009
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 27.02.2009
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|a Date Revised 31.12.2008
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a Steric effects are investigated in the reaction of aryl radicals with surfaces. The electrochemical reduction of 2-, 3-, 4-methyl, 2-methoxy, 2-ethyl, 2,6-, 2,4-, and 3,5-dimethyl, 4-tert-butyl, 3,5-bis-tert-butyl benzenediazonium, 3,5-bis(trifluoromethyl), and pentafluoro benzenediazonium tetrafluoroborates is examined in acetonitrile solutions. It leads to the formation of grafted layers only if the steric hindrance at the 2- or 2,6-position(s) is small. When the 3,5-positions are crowded with tert-butyl groups, the growth of the organic layer is limited by steric effects and a monolayer is formed. The efficiency of the grafting process is assessed by cyclic voltammetry, X-ray photoelectron spectroscopy, infrared, and ellipsometry. These experiments, together with density functional computations of bonding energies of substituted phenyl groups on a copper surface, are discussed in terms of the reactivity of aryl radicals in the electrografting reaction and in the growth of the polyaryl layer
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|a Journal Article
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|a Jiang, De-en
|e verfasserin
|4 aut
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1 |
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|a Kanoufi, Frédéric
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Pinson, Jean
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Podvorica, Fetah
|c 1st
|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 25(2009), 1 vom: 06. Jan., Seite 286-93
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|x 1520-5827
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|g volume:25
|g year:2009
|g number:1
|g day:06
|g month:01
|g pages:286-93
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|u http://dx.doi.org/10.1021/la8025792
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