Isolated Supramolecular [Ru(bpy)(3)]-Viologen-[Ru(bpy)(3)] Complexes with Trapped CB[7,8] and Photoinduced Electron-Transfer Study in Nonaqueous Solution
2011 (English)In: Chemistry - A European Journal, ISSN 0947-6539, Vol. 17, no 41, 11604-11612 p.Article in journal (Refereed) Published
The synthesis of two supramolecular diruthenium complexes, 1 subset of CB and 1 subset of CB (CB[n]=cucurbit[n]uril), which contain the respective host CB and CB, were synthesized and isolated. In the case of host CB, the desired supramolecular complex was obtained by utilizing dihydroxynapthalene as a template during the synthesis. The (1)H NMR spectra, electrochemistry, and photochemistry of these supramolecular complexes were performed in nonaqueous solution. The results show that both CB[7,8] hosts mainly bind to the linker part in solution in acetonitrile. This binding also lowers the oxidation potential of the ruthenium metal center and hinders the quenching effect by the viologen moiety. It has also been shown that external methylviologen can be included into 1 subset of CB. Analysis with NMR spectroscopy, electrochemistry, and photochemistry clearly shows a viologen radical dimer formation between the bound viologen and free methylviologen, thereby showing that the unique abilities of the CB host can be utilized even in nonaqueous solution.
Place, publisher, year, edition, pages
2011. Vol. 17, no 41, 11604-11612 p.
cucurbituril, electron transfer, ruthenium, supramolecular chemistry, viologen
IdentifiersURN: urn:nbn:se:kth:diva-24820DOI: 10.1002/chem.201002618ISI: 000297014400030ScopusID: 2-s2.0-80053195331OAI: oai:DiVA.org:kth-24820DiVA: diva2:353459
FunderSwedish Research CouncilKnut and Alice Wallenberg Foundation
Uppdaterad från manuskript till artikel 20111212.2010-09-272010-09-272011-12-12Bibliographically approved