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- W2022768751 abstract "In poly(propylene glycol) (PPG) the polymer chains are terminated by hydroxy groups. These polar ends are capable of coordinating to both cations and anions when a salt is dissolved in the polymer. This coordination has been monitored using shifts in the OH stretching vibration band at about 3400 cm−1, as measured by Fourier transform infra-red spectroscopy. In the LiCF3SO3PPG(3000) system, the Li+ ions preferred to coordinate to OH groups rather than to ether oxygens; at the composition LiCF3SO3PPG10, all OH groups were coordinated by both lithium and triflate ions, suggesting that the properties of these electrolytes depend to a large extent on metal ion to OH end-group interactions. Solvent-shared ion pairs, where the ions are separated by an OH group rather than free triflate ions, are present in these samples. The triflate ions in the solvent-shared ion pairs are suggested to have a v(SO3)s absorption band at 1032 cm−1, i.e. at the same position as has been found for non-coordinated triflate ions." @default.
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- W2022768751 title "OH end-group coordination to cations and triflate ions in PPG systems" @default.
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- W2022768751 doi "https://doi.org/10.1016/0032-3861(94)90741-2" @default.
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