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
Related Documents :
20170219 - Fluid phase coexistence and critical behavior from simulations in the restricted gibbs ...
21790599 - Use of styryl 11 and star 11 for the luminescence enhancement of cyanoacrylate-develope...
17763879 - Switching between cooperation and competition in the use of extracellular glucose.
16599709 - Density dependences of long-range fluctuations and short-range correlation lengths of c...
20365769 - Phenomenological approach to eukaryotic chemotactic efficiency.
17677229 - Fluctuation theorem for entropy production during effusion of an ideal gas with momentu...
14683179 - Trapping and manipulating neutral atoms with electrostatic fields.
21770439 - Nanoscale infrared absorption spectroscopy of individual nanoparticles enabled by scatt...
17014219 - Complex dynamics in simple hopfield neural networks.
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.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
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


Previous Document:  An experimental and quasiclassical trajectory study of the rovibrationally state-selected reactions:...
Next Document:  Gas diffusion in glasses via a probabilistic molecular dynamics.