Films of polyvinylpyrrolidone containing zinc tetraphenylporphyrin: evidence for aggregation of porphyrins in the presence of pyridine
| Autor: | Isabelle Leray, J. Faure, Robert Pansu, C. Bied-Charreton, Marie-Claude Vernières |
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| Rok vydání: | 1997 |
| Předmět: |
Microscope
Polyvinylpyrrolidone Metals and Alloys chemistry.chemical_element Surfaces and Interfaces Zinc Photochemistry Fluorescence Porphyrin Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry law Pyridine Materials Chemistry medicine Fluorescence microscope Absorption (chemistry) medicine.drug |
| Zdroj: | Thin Solid Films. 303:295-301 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/s0040-6090(96)09404-7 |
| Popis: | Films of zinc porphyrins in polyvinylpyrrolidone have been formed and studied by spectrophotometric methods. Diffusion of gaseous pyridine through a film of polyvinylpyrrolidone containing zinc tetraphenylporphyrin leads to a rearrangement of the porphyrin dye with the formation of aggregates. Absorption and fluorescence spectra are complemented by observations under an inverted Nikkon microscope equipped for epifluorescence, using a Titane-Sapphire laser as the excitation source. Fluorescence is collected through an optical fiber. The technique allows for the study of well-defined zones in the film. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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