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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1021/la301709d
|2 doi
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|a pubmed25n0730.xml
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|a (DE-627)NLM219006202
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|a (NLM)22742072
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Liatard, Sébastien
|e verfasserin
|4 aut
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|a An original electrochemical method for assembling multilayers of terpyridine-based metallic complexes on a gold surface
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|c 2012
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 30.11.2012
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|a Date Revised 21.11.2013
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a A new method based on the electrochemical oxidation of thiols was used to easily generate multilayer assemblies of coordination complexes on a gold surface. For this purpose, two complexes bearing two anchoring groups for surface attachment have been prepared: [Ru(tpySH)(2)](2+) (1) and [Fe(tpySH)(2)](2+) (2) (tpySH = 4'-(2-(p-phenoxy)ethanethiol)-2,2':6',2″-terpyridine). Cyclic voltammetry of 1 in CH(3)CN exhibits two successive oxidation processes. The first is irreversible and attributed to the oxidation of the thiol substituents, whereas the second is reversible and corresponds to the 1 e(-) metal-centered oxidation. In the case of 2 both processes are superimposed. Monolayers of 1 or 2 have been formed on gold electrodes by spontaneous adsorption from micromolar solutions of the complexes in CH(3)CN. SAMs (self-assembled monolayers) exhibit redox behavior similar to the complexes in solution. The high surface coverage value obtained (Γ = 6 × 10(-10) and 4 × 10(-10) mol cm(-2) for 1 and 2, respectively) is consistent with a vertical orientation for the complexes; thus, one thiol is bound to the gold electrode, with the second unreacted thiol moiety exposed to the outer surface. Successive cyclic voltammetry induced a layer-by-layer nanostructural growth at the surface of the SAMs, and this is presumably due to the electrochemical formation of disulfide bonds, where the thiol moieties play a double role of both an anchoring group and an electroactive coupling agent. The conditions of the deposition are studied in detail. Modified electrodes containing both 1 and 2 alternatively can be easily prepared following this new approach. The film proved to be stable, displaying a similar current/voltage response for more than 10 repeating cycles in oxidation up to 0.97 V vs Ag/AgNO(3) (10(-2) M)
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Organometallic Compounds
|2 NLM
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|a Pyridines
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|a Gold
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|a 7440-57-5
|2 NLM
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|a Ruthenium
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|a 7UI0TKC3U5
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|a Iron
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|a E1UOL152H7
|2 NLM
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| 700 |
1 |
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|a Chauvin, Jérôme
|e verfasserin
|4 aut
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|a Balestro, Franck
|e verfasserin
|4 aut
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|a Jouvenot, Damien
|e verfasserin
|4 aut
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|a Loiseau, Frédérique
|e verfasserin
|4 aut
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|a Deronzier, Alain
|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 1985
|g 28(2012), 29 vom: 24. Juli, Seite 10916-24
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:28
|g year:2012
|g number:29
|g day:24
|g month:07
|g pages:10916-24
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|u http://dx.doi.org/10.1021/la301709d
|3 Volltext
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