A host-induced intramolecular charge-transfer complex and light-driven radical cation formation of a molecular triad with cucurbit 8 uril
2008 (English)In: Journal of Organic Chemistry, ISSN 0022-3263, E-ISSN 1520-6904, Vol. 73, no 10, 3775-3783 p.Article in journal (Refereed) Published
The host-guest chemistry of systems containing a molecular triad Ru(bpy)(3)-MV2+-naphthol complex (denoted as Ru2+-MV2+-Np, 1) and cucurbituril (CB) is investigated by NMR, EST-MS, UV-vis, and electrochemistry. The Ru2+-MV2+-Np guest and CB  host can form a stable 1:1 inclusion complex, in which the naphthalene residue is back-folded and inserted together with the viologen residue into the cavity of CB. The selective binding of Ru2+-MV2+-Np guest with beta-CD and CB host is also investigated. We find that CB binds the Ru2+-MV2+-Np guest stronger than beta-CD. Upon light irradiation, a MV+center dot radical cation stabilized in the cavity of CB accompanied by the naphthalene residue has been observed. This novel system may open a new way for design and synthesis of photoactive molecular devices.
Place, publisher, year, edition, pages
2008. Vol. 73, no 10, 3775-3783 p.
IdentifiersURN: urn:nbn:se:kth:diva-17522DOI: 10.1021/jo800110bISI: 000255698500015ScopusID: 2-s2.0-43449093454OAI: oai:DiVA.org:kth-17522DiVA: diva2:335566
QC 201005252010-08-052010-08-052012-03-21Bibliographically approved