Document Detail


Exciton self-trapping in tetrafluoro-dimethyl-aminoacridine single crystals.
MedLine Citation:
PMID:  17600419     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
S Tavazzi; L Miozzo; A Papagni; L Raimondo; L Silvestri; P Spearman; A Camposeo; M Polo; D Pisignano
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of chemical physics     Volume:  126     ISSN:  0021-9606     ISO Abbreviation:  J Chem Phys     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-06-29     Completed Date:  2007-08-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375360     Medline TA:  J Chem Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  234501     Citation Subset:  IM    
Affiliation:
Dipartimento Scienza dei Materiali, Università di Milano Bicocca, Via Cozzi 53, 1-2 0125 Milano, Italy.
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MeSH Terms
Descriptor/Qualifier:
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:
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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