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231224s2017 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.6b03860
|2 doi
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|a pubmed24n0891.xml
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|a DE-627
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|e rakwb
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|a eng
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|a Méndez-Ardoy, Alejandro
|e verfasserin
|4 aut
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| 245 |
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|a Electron-Transfer Rates in Host-Guest Assemblies at β-Cyclodextrin Monolayers
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|c 2017
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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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|2 rdacarrier
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|a Date Completed 23.07.2018
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|a Date Revised 23.12.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The effect of the distance between a β-cyclodextrin (βCD) host core and a conductive substrate on the electron-transfer rate of complexed guests as well as of free-diffusing electrochemically active probes has been studied. First we have evaluated a set of short-tethered βCD adsorbates bearing different anchoring groups in order to get a reliable platform for the study of short-distance electron transfer. An electrochemically active trivalent guest was immobilized on these host monolayers in a selective and reversible manner, providing information about the packing density. Iodine- and nitrile-functionalized βCD monolayers gave coverages close to maximum packing. Electron transfer in the presence of Fe(CN)63-/4- studied by impedance spectroscopy revealed that the electron transfer of the diffusing probe was 3 orders of magnitude faster than when the βCD cores were separated from the surface by undecyl chains. When an electrochemically active guest was immobilized on the surface, electron-transfer rate measurements by cyclic voltammetry and capacitance spectroscopy showed differences of up to a factor of 8 for different βCD monolayers. These results suggest that increasing the distance between the βCD core and the underlying conductive substrate leads to a diminishing of the electron-transfer rate
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Steentjes, Tom
|e verfasserin
|4 aut
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|a Boukamp, Bernard A
|e verfasserin
|4 aut
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|a Jonkheijm, Pascal
|e verfasserin
|4 aut
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|a Kudernac, Tibor
|e verfasserin
|4 aut
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|a Huskens, Jurriaan
|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 33(2017), 35 vom: 05. Sept., Seite 8614-8623
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:33
|g year:2017
|g number:35
|g day:05
|g month:09
|g pages:8614-8623
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|u http://dx.doi.org/10.1021/acs.langmuir.6b03860
|3 Volltext
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