1. Alteration of optical anisotropy by adsorption of volatile molecules on ordered metalloporphyrins layers
- Author
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Ludovoico Valli, S. Cirilli, Claudio Goletti, Arnaldo D'Amico, D. D'Ercole, Luca Tortora, C. Di Natale, Roberto Paolesse, Eugenio Martinelli, Gianlorenzo Bussetti, P. Chiaradia, A. Violante, G., Bussetti, D., D'Ercole, S., Cirilli, A., Violante, C., Goletti, P., Chiaradia, L., Tortora, R., Paolesse, E., Martinelli, C., Di Natale, A., D'Amico, Valli, Ludovico, Bussetti, Gianlorenzo, D'Ercole, D., Cirilli, S., Violante, A., Goletti, C., Chiaradia, P., Tortora, Luca, Paolesse, R., Martinelli, E., Di Natale, C., D'Amico, A., and Valli, Ludovoico
- Subjects
Analyte ,Porphyrins ,Molecule-molecule interaction ,Optical anisotropy ,Organic ordered layer ,Sensor ,Volatile organic compound ,Electronic, Optical and Magnetic Materials ,Condensed Matter Physics ,Langmuir-Blodgett film ,Analytical chemistry ,CHEMICAL SENSORS ,Photochemistry ,FILMS ,Spectral line ,Settore FIS/03 - Fisica della Materia ,GAS-SENSING PROPERTIES ,chemistry.chemical_compound ,Adsorption ,CUBIC SEMICONDUCTORS ,Monolayer ,Electronic ,Molecule ,Optical and Magnetic Materials ,Thin film ,DEPOSITION ,Anisotropy ,SPECTROSCOPY ,Electronic, Optical and Magnetic Material ,optical characterisation ,Porphyrin ,chemistry ,porphyrin - Abstract
Reflectance anisotropy spectra of porphyrin thin films (30 monolayers) show a permanent change in their line shape when porphyrins are exposed to some specific analytes (e.g., amines). From this experimental evidence, we concluded that a molecular package adjustment occurred in the film upon interaction with the volatile compound, most likely in the outermost layers. This result is of paramount importance for the consequent application of these films in optical gas-sensors. Consequently, this system could be used as a prototype for optical gas-sensing of aggressive analytes or, more ambitiously, to investigate the porphyrinanalyte interaction. © 2009 Society of Photo-Optical Instrumentation Engineers.
- Published
- 2009