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|Title:||Coarse-grained simulations of the effects of chain length, solvent quality, and chemical defects on the solution-phase morphology of MEH-PPV conjugated polymers|
|Citation:||Australian Journal of Chemistry, 2012; 65(5):463-471|
|Publisher:||C S I R O Publishing|
|Ming Chiu, Tak W. Kee and David M. Huang|
|Abstract:||A mesoscale coarse-grained model of the conjugated polymer poly(2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PPV) in implicit solvent is developed. The model is parametrized to reproduce the local structure and dynamics of an atomistic simulation model and accounts for the effects of solvent quality and saturation chemical defects on the polymer structure. Polymers with defect concentrations of 0 to 10 % are simulated using Langevin dynamics in tetrahydrofuran (THF) and in a model poor solvent for chain lengths and solution concentrations used experimentally. The polymer chains are extended in THF and collapse into compact structures in the poor solvent. The radius of gyration decreases with defect content in THF and agrees quantitatively with experiment. The structures formed in poor solvent by chains with 300 monomer units change from toroidal to cylindrical with increasing defect content, while chains containing 1000 monomers form cylinders regardless of defect content. These results have implications for energy transfer in MEH-PPV.|
|Description:||Corrected by: Corrigendum to: Coarse-grained simulations of the effects of chain length, solvent quality, and chemical defects on the solution-phase morphology of MEH-PPV conjugated polymers (Australian Journal of Chemistry 65: 5 (463-471)), in Australian Journal of Chemistry 66(4) 505 - 505. The last sentence of the first paragraph (left column) on page 470 should read: The persistence length lp was estimated from lp¼3Rg 2 /Rmax, where Rmax is the chain contour length, to be 9.3 nm and 7.7 nm (or roughly 14 and 12 monomers) for the 0%- and 10 %-defect polymers, respectively, with Nmon¼1000.|
|Rights:||Journal compilation © CSIRO 2012|
|Appears in Collections:||Chemistry publications|
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