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Type: 
Journal
Description: 
Ring the changes: Experimental Raman spectra of fluorinated and non‐fluorinated polyphenylenevinylenes are assigned according to quantum chemical calculations for oligomer model systems (see picture). Characteristic differences in the spectra can be traced back to strong inter‐ring distortion of the fluorinated compounds. The Raman spectrum of poly{2‐methoxy‐5‐[(2‐ethylhexyl)oxy]‐1,4‐phenylenedifluorovinylene} (MEH‐PPDFV) is reported and compared with that of a well‐known non‐fluorinated reference polymer, namely poly{2‐methoxy‐5‐[(2‐ethylhexyl)oxy]‐1,4‐phenylenevinylene} (MEH‐PPV). The Raman spectra of both polymers are assigned on the basis of density functional theory calculations of the corresponding oligomers. The main differences between vinylene fluorinated and non‐fluorinated structures deal with the intensity, frequency shift and broadening of CC vinylene stretching …
Publisher: 
WILEY‐VCH Verlag
Publication date: 
2 Jun 2009
Authors: 

Manuel Piacenza, Davide Comoretto, Martin Burger, Valentina Morandi, Franco Marabelli, Carmella Martinelli, Gianluca M Farinola, Antonio Cardone, Giuseppe Gigli, Fabio Della Sala

Biblio References: 
Volume: 10 Issue: 8 Pages: 1284-1290
Origin: 
ChemPhysChem