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http://hdl.handle.net/2445/169288
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DC Field | Value | Language |
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dc.contributor.author | Ballardini, Roberto | - |
dc.contributor.author | Balzani, Vincenzo | - |
dc.contributor.author | Credi, A. (Alberto), 1970- | - |
dc.contributor.author | Gandolfi, Maria Teresa | - |
dc.contributor.author | Prodi, Luca | - |
dc.contributor.author | Venturi, Margherita | - |
dc.contributor.author | Pérez García, M. Lluïsa (Maria Lluïsa) | - |
dc.contributor.author | Stoddart, J. Frasser | - |
dc.date.accessioned | 2020-07-22T10:08:20Z | - |
dc.date.available | 2020-07-22T10:08:20Z | - |
dc.date.issued | 1995 | - |
dc.identifier.issn | 0016-5603 | - |
dc.identifier.uri | http://hdl.handle.net/2445/169288 | - |
dc.description.abstract | The photochemical, photophysical, and electrochemical behaviour of t-1,2-bis(1-benzy1-4- pyridinium)ethylene (t-DBBPE2+) (used as model compound), a cyclophane made of two t-1,2-bis(4-pyridin-ium)ethylene (BPE) units (141, and its catenanes (1B134+,1BN4+, and INN') with aromatic crown ethers containing two p-dimethoxybenzene units (BB), one p-dimethoxybenzene and one 1,5-dimethoxynaphthalene unit (BN), and two 1,5-dimethoxynaphthalene units (NN) have been investigated in acetonitrile solution. For both t-DBBPE' and 14+, fluorescence and direct trans-*cis photoisomerization are prevented by the presence of an intramolecular charge-transfer (CT) excited state close to or below the lire level, but the triplet-sensitized photoisomerization takes place with high quantum yield. In the 1BB4*, 1BN4', and 1NN4' catenanes, also the triplet sensitized photoisomerization is quenched by the presence of lower lying inter-component CT levels. The intercomponent CT interaction present in the catenanes affects the reduction potentials of the t-DBBPE2+ units of 14+. Such an interaction, which plays the role of a brake against the free rotation of the two rings of catenanes, is released upon reduction of the 14+ cyclophane. | - |
dc.format.extent | 7 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Società Chimica Italiana | - |
dc.relation.isformatof | Reproducció del document publicat a: | - |
dc.relation.ispartof | Gazzetta Chimica Italiana, 1995, vol. 125, p. 353-359 | - |
dc.rights | (c) Ballardini, Roberto et al., 1995 | - |
dc.source | Articles publicats en revistes (Farmacologia, Toxicologia i Química Terapèutica) | - |
dc.subject.classification | Fotoquímica | - |
dc.subject.classification | Nanoquímica | - |
dc.subject.classification | Compostos heterocíclics | - |
dc.subject.other | Photochemistry | - |
dc.subject.other | Nanochemistry | - |
dc.subject.other | Heterocyclic compounds | - |
dc.title | Photochemical, Photophysical and Electrochemical Properties of a Photoisomerizable Cyclophane and its [2]Catenates with Aromatic Crown Ethers | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 111976 | - |
dc.date.updated | 2020-07-22T10:08:20Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Farmacologia, Toxicologia i Química Terapèutica) |
Files in This Item:
File | Description | Size | Format | |
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111976.pdf | 1.22 MB | Adobe PDF | View/Open |
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