Document Detail

Light assisted dimer to monomer transformation in heavily doped rhodamine 6G-Porous silica hybrids.
MedLine Citation:
PMID:  19354303     Owner:  NLM     Status:  PubMed-not-MEDLINE    
The spectral properties of postdoping prepared type I Rhodamine 6G-silica hybrids were investigated in the case of intentionally large doping (5 x 10(-2) mol/L). Beside expected concentration quenching effects, steady state and time resolved optical spectroscopy measurements displayed the presence of different kind of aggregates, both fluorescent and nonfluorescent. As the irradiation dose on the sample increases, the emission features change: the overall emission increases, the peak of the emission is blue-shifted, and the emission decay time also increases. The modifications of the spectral properties under light excitation are interpreted in terms of dimer to monomer light assisted transformation, and a thermodynamic model based on a monomolecular kinetics is presented.
Carlo M Carbonaro; Franco Meinardi; Pier C Ricci; Marcello Salis; Alberto Anedda
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of physical chemistry. B     Volume:  113     ISSN:  1520-6106     ISO Abbreviation:  J Phys Chem B     Publication Date:  2009 Apr 
Date Detail:
Created Date:  2009-04-09     Completed Date:  2009-06-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101157530     Medline TA:  J Phys Chem B     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5111-6     Citation Subset:  -    
Dipartimento di Fisica, Universita di Cagliari, Cittadella Universitaria, S.P. no. 8, I-09042 Monserrato, Cagliari, Italy.
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