@misc{traiphol_influences_of_2007, 
author={Traiphol, R.,Srikhirin, T.,Kerdcharoen, T.,Osotchan, T.,Scharnagl, N.,Willumeit, R.},
title={Influences of local polymer-solvent p-p-interaction on dynamics of phenyl ring rotation and its role on photophysics of conjugated polymer},
year={2007},
howpublished = {journal article},
doi = {https://doi.org/10.1016/j.eurpolymj.2006.11.022},
abstract = {In this report, the role of local polymer–solvent π–π-interaction on rotational dynamics of phenyl rings of poly[2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylenevinylene] (MEH-PPV) is examined by utilizing nuclear magnetic resonance (NMR) spectroscopy. We have found that an aromatic solvent can couple strongly with the phenyl rings via favorable local π–π-interaction, causing a restriction of the ring rotation. The dynamic process takes place at much faster rate in a non-aromatic solvent. NMR line shape analysis indicates the existence of two side chain configurations with relatively long life-time in toluene and pyridine while a single time-averaged configuration is detected in chloroform and tetrahydrofuran. Addition of chloroform or cyclohexane to a solution of MEH-PPV in toluene is accompanied by an increase of the rotational dynamics. This indicates that the expansion or collapse of main chain upon varying solvent quality play a minor role on the rotational dynamics. The relationship between the dynamics of ring rotation and photophysics of MEH-PPV in solution is discussed.},
note = {Online available at: \url{https://doi.org/10.1016/j.eurpolymj.2006.11.022} (DOI). Traiphol, R.; Srikhirin, T.; Kerdcharoen, T.; Osotchan, T.; Scharnagl, N.; Willumeit, R.: Influences of local polymer-solvent p-p-interaction on dynamics of phenyl ring rotation and its role on photophysics of conjugated polymer. European Polymer Journal. 2007. vol. 43, no. 2, 478-487. DOI: 10.1016/j.eurpolymj.2006.11.022}}