Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/5280
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dc.contributor.authorRichardson, T.-
dc.contributor.authorSmith, V. C.-
dc.contributor.authorJohnstone, R. A. W.-
dc.contributor.authorSobral, A. J. F. N.-
dc.contributor.authorRocha-Gonsalves, A. M. d'A.-
dc.date.accessioned2008-09-01T15:07:02Z-
dc.date.available2008-09-01T15:07:02Z-
dc.date.issued1998en_US
dc.identifier.citationThin Solid Films. 327-329:(1998) 315-320en_US
dc.identifier.urihttp://hdl.handle.net/10316/5280-
dc.description.abstractThe influence of gaseous chlorine on monolayers of metal-free meso-tetra(4-amino sulfonyl)phenylporphyrin is discussed. These films exhibit characteristic intense optical absorption bands in the region 400-700 nm. Upon exposure to chlorine vapour in the concentration range 0.1-10 ppm, the Soret and Q-bands decrease in intensity and new bands at ~455 nm and ~660 nm appear. The rate of response has been measured as a function of deposition surface pressure and gas concentration. Repeated dosing experiments have shown that reversible and reproducible sensing action occurs provided that a threshold concentration is not exceeded. The recovery of the original optical spectrum can be accelerated with moderate heat treatment (60°C for 10 min). Ageing experiments have shown that the basic response of the monolayer is not effected over a time period of at least 5 months.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/B6TW0-3VV0K4W-2D/1/d4a4ed344aa0216ef5d8648dd4c71029en_US
dc.format.mimetypeaplication/PDFen
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectChlorineen_US
dc.subjectPorphyrinen_US
dc.subjectLangmuir-Blodgetten_US
dc.titleOptical response of monolayer films of a metal-free sulfonamido-porphyrinen_US
dc.typearticleen_US
item.fulltextCom Texto completo-
item.grantfulltextopen-
item.languageiso639-1en-
crisitem.author.deptFaculdade de Ciências e Tecnologia, Universidade de Coimbra-
crisitem.author.deptFaculdade de Ciências e Tecnologia, Universidade de Coimbra-
crisitem.author.parentdeptUniversidade de Coimbra-
crisitem.author.parentdeptUniversidade de Coimbra-
crisitem.author.researchunitCoimbra Chemistry Center-
crisitem.author.researchunitCoimbra Chemistry Center-
crisitem.author.orcid0000-0001-6367-027X-
crisitem.author.orcid0000-0001-9987-7301-
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais
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