Abstract
Measurements of 13C spin-lattice relaxation times, T1, and nuclear Overhauser effects, NOE, were carried out as a function of temperature at two magnetic fields for iso-poly(2-vinylpyridine) (iso-P2VP) in 1,4-dioxane-d8 and iso-poly(2-vinylpyridinium chloride) (iso-P2VPCl), in D2O to investigate the effects of electrostatic interactions on local chain dynamics. For main chain carbons of both polymers, the experimental T1 and NOE data are in good agreement with the Dejean-Laupretre-Monnerie (DLM) model in the entire temperature range. It was found that the local conformational transitions of main chain and the libration are more restricted for iso-P2VPCl than iso-P2VP. For pyridyl ring carbons, the experimental data were reproduced by the models combining the DLM model and restricted ring rotations. The angular amplitude α of ring rotation of iso-P2VPCl is smaller than that of iso-P2VP. These results imply that both local motions of main chain and side chain are affected by the electrostatic interactions.
| Original language | English |
|---|---|
| Pages (from-to) | 614-620 |
| Number of pages | 7 |
| Journal | Polymer Journal |
| Volume | 31 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1999 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Materials Chemistry
- Polymers and Plastics
Cite this
13C NMR relaxation of iso-poly(2-vinylpyridinium chloride) in aqueous solution. Effects of electrostatic interactions on local chain dynamics. / Yamazaki, Shinichi; Okada, Eisaku; Muroga, Yoshio; Noda, Ichiro; Tsutsumi, Akihiro.
In: Polymer Journal, Vol. 31, No. 7, 1999, p. 614-620.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - 13C NMR relaxation of iso-poly(2-vinylpyridinium chloride) in aqueous solution. Effects of electrostatic interactions on local chain dynamics
AU - Yamazaki, Shinichi
AU - Okada, Eisaku
AU - Muroga, Yoshio
AU - Noda, Ichiro
AU - Tsutsumi, Akihiro
PY - 1999
Y1 - 1999
N2 - Measurements of 13C spin-lattice relaxation times, T1, and nuclear Overhauser effects, NOE, were carried out as a function of temperature at two magnetic fields for iso-poly(2-vinylpyridine) (iso-P2VP) in 1,4-dioxane-d8 and iso-poly(2-vinylpyridinium chloride) (iso-P2VPCl), in D2O to investigate the effects of electrostatic interactions on local chain dynamics. For main chain carbons of both polymers, the experimental T1 and NOE data are in good agreement with the Dejean-Laupretre-Monnerie (DLM) model in the entire temperature range. It was found that the local conformational transitions of main chain and the libration are more restricted for iso-P2VPCl than iso-P2VP. For pyridyl ring carbons, the experimental data were reproduced by the models combining the DLM model and restricted ring rotations. The angular amplitude α of ring rotation of iso-P2VPCl is smaller than that of iso-P2VP. These results imply that both local motions of main chain and side chain are affected by the electrostatic interactions.
AB - Measurements of 13C spin-lattice relaxation times, T1, and nuclear Overhauser effects, NOE, were carried out as a function of temperature at two magnetic fields for iso-poly(2-vinylpyridine) (iso-P2VP) in 1,4-dioxane-d8 and iso-poly(2-vinylpyridinium chloride) (iso-P2VPCl), in D2O to investigate the effects of electrostatic interactions on local chain dynamics. For main chain carbons of both polymers, the experimental T1 and NOE data are in good agreement with the Dejean-Laupretre-Monnerie (DLM) model in the entire temperature range. It was found that the local conformational transitions of main chain and the libration are more restricted for iso-P2VPCl than iso-P2VP. For pyridyl ring carbons, the experimental data were reproduced by the models combining the DLM model and restricted ring rotations. The angular amplitude α of ring rotation of iso-P2VPCl is smaller than that of iso-P2VP. These results imply that both local motions of main chain and side chain are affected by the electrostatic interactions.
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U2 - 10.1295/polymj.31.614
DO - 10.1295/polymj.31.614
M3 - Article
VL - 31
SP - 614
EP - 620
JO - Polymer Journal
JF - Polymer Journal
SN - 0032-3896
IS - 7
ER -