| Exciton self-trapping in tetrafluoro-dimethyl-aminoacridine single crystals. | |
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MedLine Citation:
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PMID: 17600419 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The UV-visible optical spectra of 1,2,3,4-tetrafluoro-7-(N,N)dimethyl-amino-acridine single crystals are reported. The results are discussed on the basis of the molecular transitions and crystal packing in the framework of the theory of molecular excitons under a fluctuating potential field due to dynamic disorder. A strong local geometry distortion is demonstrated by applying the Urbach rule to the absorption tails, which is the amplitude of the local potential fluctuation being larger than the intermolecular transfer energy. The lineshape and linewidth of the emission band and its temperature dependence give further evidence of exciton self-trapping. |
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Authors:
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S Tavazzi; L Miozzo; A Papagni; L Raimondo; L Silvestri; P Spearman; A Camposeo; M Polo; D Pisignano |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of chemical physics Volume: 126 ISSN: 0021-9606 ISO Abbreviation: J Chem Phys Publication Date: 2007 Jun |
Date Detail:
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Created Date: 2007-06-29 Completed Date: 2007-08-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375360 Medline TA: J Chem Phys Country: United States |
Other Details:
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Languages: eng Pagination: 234501 Citation Subset: IM |
Affiliation:
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Dipartimento Scienza dei Materiali, Università di Milano Bicocca, Via Cozzi 53, 1-2 0125 Milano, Italy. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Absorption Acridines / chemistry* Aminacrine / chemistry* Azasteroids / chemistry* Chemistry, Physical / methods* Crystallization Dihydrotestosterone / analogs & derivatives*, chemistry Electrons Fluorine / chemistry* Photons Spectrophotometry Spectrophotometry, Ultraviolet Temperature |
| Chemical | |
Reg. No./Substance:
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0/1,2,3,4-tetrafluoro-7-(N,N)dimethyl-amino-acridine; 0/Acridines; 0/Azasteroids; 521-18-6/Dihydrotestosterone; 73671-86-0/17-N,N-diethylcarbamoyl-4-methyl-4-azaandrostane-3-one; 7782-41-4/Fluorine; 90-45-9/Aminacrine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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