Publication
A comparative study of the photophysics and photochemistry of 4-chlorophenol adsorbed on silicalite and beta-cyclodextrin
| dc.contributor.author | Da Silva, José Paulo | |
| dc.contributor.author | Ferreira, Luís F. Vieira | |
| dc.contributor.author | Silva, Abílio M. da | |
| dc.contributor.author | Oliveira, A. S. | |
| dc.date.accessioned | 2015-06-22T14:13:48Z | |
| dc.date.available | 2015-06-22T14:13:48Z | |
| dc.date.issued | 2002 | |
| dc.description.abstract | The photochemistry and photophysics of 4-chlorophenol (4-CP) were studied onto two model solid supports, silicalite and beta-cyclodextrin (beta-Cl)), using time resolved diffuse reflectance techniques and product degradation analysis. The results have shown that the photochemistry and photophysics of 4-CP are different from solution and depend on the solid. Ground state diffuse reflectance and time resolved luminescence demonstrated the inclusion of the probe in both substrates. 4-CP exhibits room temperature luminescence in both hosts, being structured and much more intense in beta-CD. The emission was assigned to phosphorescence of the inclusion complex. Transient absorption demonstrated the formation of the unsubstituted phenoxyl radical and of 4-chlorophenoxyl radical in beta-CD. In silicalite only the later was detected. The studies of the photodegradation products indicate that phenol is the main photoproduct in beta-CD. In silicalite the chromatographic analysis indicates the presence of products that involve the ring cleavage. (C) 2002 Elsevier Science B.V. All rights reserved. | |
| dc.identifier.doi | https://dx.doi.org/10.1016/S1010-6030(02)00178-8 | |
| dc.identifier.issn | 1010-6030 | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/6546 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | Elsevier | |
| dc.relation.isbasedon | P-000-NAA | |
| dc.subject | Chlorophenol | |
| dc.subject | Silicalite | |
| dc.subject | β-Cyclodextrin | |
| dc.subject | Diffuse reflectance | |
| dc.subject | Laser flash photolysis | |
| dc.title | A comparative study of the photophysics and photochemistry of 4-chlorophenol adsorbed on silicalite and beta-cyclodextrin | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 164 | |
| oaire.citation.issue | 1-3 | |
| oaire.citation.startPage | 157 | |
| oaire.citation.title | Journal of Photochemistry and Photobiology A: Chemistry | |
| oaire.citation.volume | 151 | |
| person.familyName | Da Silva | |
| person.givenName | José Paulo | |
| person.identifier.ciencia-id | 3413-C4F4-73F7 | |
| person.identifier.orcid | 0000-0002-6458-7328 | |
| person.identifier.rid | A-4606-2008 | |
| person.identifier.scopus-author-id | 7201733236 | |
| rcaap.rights | restrictedAccess | |
| rcaap.type | article | |
| relation.isAuthorOfPublication | e2004fa2-a47d-44b0-b11c-fc95fe51cbf9 | |
| relation.isAuthorOfPublication.latestForDiscovery | e2004fa2-a47d-44b0-b11c-fc95fe51cbf9 |
Files
Original bundle
1 - 1 of 1
No Thumbnail Available
- Name:
- A comparative study of the photophysics and photochemistry of 4-chlorophenol adsorbed on silicalite and β-cyclodextrin.pdf
- Size:
- 185.63 KB
- Format:
- Adobe Portable Document Format