Complex impedance and multifrequency 23Na NMR study of poly (propylene oxide) complexed with NaB (C6H5)4

Y. S. Pak; K. J. Adamic; S. G. Greenbaum; M. C. Wintersgill; J. J. Fontanella; C. S. Coughlin

doi:10.1016/0167-2738(91)90162-5

Complex impedance and multifrequency ²³Na NMR study of poly (propylene oxide) complexed with NaB (C₆H₅)₄

Y. S. Pak, K. J. Adamic, S. G. Greenbaum, M. C. Wintersgill, J. J. Fontanella, C. S. Coughlin

Applied Research Laboratory (ARL)

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Complex impedance and multifrequency ²³Na nuclear magnetic resnoance (NMR) measurements on a poly (propylene oxide): sodium tetraphenylborate, PPO₈NaB(C₆H₅)₄, solid polymer electrolyte, with a composition of eight ether oxygens per sodium, are reported. The NMR linewidths are found to be second-order quadrupole broadened, thus indicating low site-symmetry for the Na⁺ ions. The title compound exhibits some interesting differences in properties compared to other PPO-Na salt complexes, including an anomalously low value of the stretched exponential parameter ß_se (obtained in fits to electric modulus data), an unusually high glass transition temperature (T_g=306 K), and sub-T_g line narrowing of lower frequency ²³Na resonances. This last phenomenon is attributed to strong interaction between the Na⁺ ions and their large [B(C₆H₅)₄]^- counterions caused by the localization of the [B(C₆H₅)₄]^- anions in weak interactions with the polymer chains which, in turn, leads to the elevated glass transition temperatures.

Original language	English (US)
Pages (from-to)	277-284
Number of pages	8
Journal	Solid State Ionics
Volume	45
Issue number	3-4
DOIs	https://doi.org/10.1016/0167-2738(91)90162-5
State	Published - Apr 1991

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science
Condensed Matter Physics

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@article{153a10275f05461aafa1e6a7fec3652a,

title = "Complex impedance and multifrequency 23Na NMR study of poly (propylene oxide) complexed with NaB (C6H5)4",

abstract = "Complex impedance and multifrequency 23Na nuclear magnetic resnoance (NMR) measurements on a poly (propylene oxide): sodium tetraphenylborate, PPO8NaB(C6H5)4, solid polymer electrolyte, with a composition of eight ether oxygens per sodium, are reported. The NMR linewidths are found to be second-order quadrupole broadened, thus indicating low site-symmetry for the Na+ ions. The title compound exhibits some interesting differences in properties compared to other PPO-Na salt complexes, including an anomalously low value of the stretched exponential parameter {\ss}se (obtained in fits to electric modulus data), an unusually high glass transition temperature (Tg=306 K), and sub-Tg line narrowing of lower frequency 23Na resonances. This last phenomenon is attributed to strong interaction between the Na+ ions and their large [B(C6H5)4]- counterions caused by the localization of the [B(C6H5)4]- anions in weak interactions with the polymer chains which, in turn, leads to the elevated glass transition temperatures.",

author = "Pak, {Y. S.} and Adamic, {K. J.} and Greenbaum, {S. G.} and Wintersgill, {M. C.} and Fontanella, {J. J.} and Coughlin, {C. S.}",

note = "Funding Information: This work was supported by grants from the PSC-CUNY Faculty Research Award Program and the Naval Academy Research Council.",

year = "1991",

month = apr,

doi = "10.1016/0167-2738(91)90162-5",

language = "English (US)",

volume = "45",

pages = "277--284",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

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TY - JOUR

T1 - Complex impedance and multifrequency 23Na NMR study of poly (propylene oxide) complexed with NaB (C6H5)4

AU - Pak, Y. S.

AU - Adamic, K. J.

AU - Greenbaum, S. G.

AU - Wintersgill, M. C.

AU - Fontanella, J. J.

AU - Coughlin, C. S.

N1 - Funding Information: This work was supported by grants from the PSC-CUNY Faculty Research Award Program and the Naval Academy Research Council.

PY - 1991/4

Y1 - 1991/4

N2 - Complex impedance and multifrequency 23Na nuclear magnetic resnoance (NMR) measurements on a poly (propylene oxide): sodium tetraphenylborate, PPO8NaB(C6H5)4, solid polymer electrolyte, with a composition of eight ether oxygens per sodium, are reported. The NMR linewidths are found to be second-order quadrupole broadened, thus indicating low site-symmetry for the Na+ ions. The title compound exhibits some interesting differences in properties compared to other PPO-Na salt complexes, including an anomalously low value of the stretched exponential parameter ßse (obtained in fits to electric modulus data), an unusually high glass transition temperature (Tg=306 K), and sub-Tg line narrowing of lower frequency 23Na resonances. This last phenomenon is attributed to strong interaction between the Na+ ions and their large [B(C6H5)4]- counterions caused by the localization of the [B(C6H5)4]- anions in weak interactions with the polymer chains which, in turn, leads to the elevated glass transition temperatures.

AB - Complex impedance and multifrequency 23Na nuclear magnetic resnoance (NMR) measurements on a poly (propylene oxide): sodium tetraphenylborate, PPO8NaB(C6H5)4, solid polymer electrolyte, with a composition of eight ether oxygens per sodium, are reported. The NMR linewidths are found to be second-order quadrupole broadened, thus indicating low site-symmetry for the Na+ ions. The title compound exhibits some interesting differences in properties compared to other PPO-Na salt complexes, including an anomalously low value of the stretched exponential parameter ßse (obtained in fits to electric modulus data), an unusually high glass transition temperature (Tg=306 K), and sub-Tg line narrowing of lower frequency 23Na resonances. This last phenomenon is attributed to strong interaction between the Na+ ions and their large [B(C6H5)4]- counterions caused by the localization of the [B(C6H5)4]- anions in weak interactions with the polymer chains which, in turn, leads to the elevated glass transition temperatures.

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Complex impedance and multifrequency ²³Na NMR study of poly (propylene oxide) complexed with NaB (C₆H₅)₄

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