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Selective Positioning of CB 8 on Two Linked Viologens and Electrochemically Driven Movement of the Host Molecule
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
KTH, Skolan för kemivetenskap (CHE), Centra, Molekylär elektronik, CMD.
KTH, Skolan för kemivetenskap (CHE), Centra, Molekylär elektronik, CMD.
Vise andre og tillknytning
2009 (engelsk)Inngår i: European Journal of Organic Chemistry, ISSN 1434-193X, E-ISSN 1099-0690, nr 8, s. 1163-1172Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The binding interactions between cucurbit[8]uril (CB[8]) and a dicationic guest N,N-dimethyl-3,3'-dimethyl-4,4'-bipyridinium (DMV2+) have been investigated by various experimental techniques including NMR, ESI-MS, and UV/Vis and fluorescence spectroscopy. In a three-component system consisting of CB[81, N,N-dimethyl-4,4'-bipyridinium (MV2+) and DMV2+, CB[8] was found to exhibit a higher binding affinity to DMV2+ than to MV2+, When DMV2+ was connected to MV2+ by an alkyl chain, the first equiv. of CB[8] could be selectively positioned on the DMV2+ moiety, and then a second equiv. of CB[8] was positioned on the MV2+ moiety. Spectroelectrochemical studies showed that upon the reduction of this system at -0.6 V vs. AgCl, the CB[8] could move from the DMV2+ moiety to the MV+center dot radical, which formed a dimer inside the CB[8] cavity. Molecular oxygen quenched the dimer, and the CB[8] moved back to the DMV2+ moiety, indicating it molecular movement driven by electrochemistry. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

sted, utgiver, år, opplag, sider
2009. nr 8, s. 1163-1172
Identifikatorer
URN: urn:nbn:se:kth:diva-18254DOI: 10.1002/ejoc.200801012ISI: 000264308100009Scopus ID: 2-s2.0-62249117106OAI: oai:DiVA.org:kth-18254DiVA, id: diva2:336300
Merknad

QC 20100525

Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert
Inngår i avhandling
1. Supramolecular chemistry based on redox-active components and cucurbit[n]urils
Åpne denne publikasjonen i ny fane eller vindu >>Supramolecular chemistry based on redox-active components and cucurbit[n]urils
2010 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis describes the host-guest chemistry between Cucurbit[7]uril (CB[7]) and CB[8] and a series of guests including bispyridinium cations, phenols and  napthalenes. These guests are bound to ruthenium polypyridine complexes or ruthenium based water oxidation catalysts (WOCs). The investigations are based upon utilizing the covalently linked photosensitizer and the electronic effects and chemical processes are investigated.

sted, utgiver, år, opplag, sider
Stockholm: KTH, 2010. s. 59
Serie
Trita-CHE-Report, ISSN 1654-1081 ; 2010:38
Emneord
Cucurbit[n]uril, redox-active, viologen, light-driven, water oxidation, molecular motor
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-24730 (URN)978-91-7415-742-0 (ISBN)
Disputas
2010-10-15, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Merknad
QC 20100927Tilgjengelig fra: 2010-09-27 Laget: 2010-09-24 Sist oppdatert: 2011-12-12bibliografisk kontrollert

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