Proton exchange in hybrid sulfonated poly(ether ether ketone)-silica membranes by 1H solid-state NMR

Maria Baias; Dan E. Demco; Irene Colicchio; Bernhard Blümich; Martin Möller

doi:10.1016/j.cplett.2008.03.048

Proton exchange in hybrid sulfonated poly(ether ether ketone)-silica membranes by ¹H solid-state NMR

Maria Baias, Dan E. Demco, Irene Colicchio, Bernhard Blümich, Martin Möller

Chemistry

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

Abstract

Enthalpy of activation for proton exchange processes in fully hydrated hybrid sulfonated poly(ether ether ketone)-silica (SPEEK/SiO₂) membranes were measured from the ¹H NMR spectra under magic angle sample spinning (MAS). For the first time Eyring function is used for this purpose. Two exchange processes between different water pools were detected. The isotropic chemical shift of the ¹H spectrum allows us to obtain information about the normalized enthalpy of activation characterizing the water exchange. These results show that the proton exchange membranes performances could be improved by addition of small concentrations of silica in the range of 5-10 wt.%.

Original language	English (US)
Pages (from-to)	227-230
Number of pages	4
Journal	Chemical Physics Letters
Volume	456
Issue number	4-6
DOIs	https://doi.org/10.1016/j.cplett.2008.03.048
State	Published - May 5 2008

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/j.cplett.2008.03.048

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title = "Proton exchange in hybrid sulfonated poly(ether ether ketone)-silica membranes by 1H solid-state NMR",

abstract = "Enthalpy of activation for proton exchange processes in fully hydrated hybrid sulfonated poly(ether ether ketone)-silica (SPEEK/SiO2) membranes were measured from the 1H NMR spectra under magic angle sample spinning (MAS). For the first time Eyring function is used for this purpose. Two exchange processes between different water pools were detected. The isotropic chemical shift of the 1H spectrum allows us to obtain information about the normalized enthalpy of activation characterizing the water exchange. These results show that the proton exchange membranes performances could be improved by addition of small concentrations of silica in the range of 5-10 wt.%.",

author = "Maria Baias and Demco, {Dan E.} and Irene Colicchio and Bernhard Bl{\"u}mich and Martin M{\"o}ller",

note = "Funding Information: The useful discussions with Professor Crisan Popescu, Dr. Xiaomin Zhu, and Professor Uwe Beginn are gratefully acknowledged. D.E.D. gratefully acknowledged the support of Romanian Ministry of Education and Research under Project PN II, ID-1102.",

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doi = "10.1016/j.cplett.2008.03.048",

language = "English (US)",

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T1 - Proton exchange in hybrid sulfonated poly(ether ether ketone)-silica membranes by 1H solid-state NMR

AU - Baias, Maria

AU - Demco, Dan E.

AU - Colicchio, Irene

AU - Blümich, Bernhard

AU - Möller, Martin

N1 - Funding Information: The useful discussions with Professor Crisan Popescu, Dr. Xiaomin Zhu, and Professor Uwe Beginn are gratefully acknowledged. D.E.D. gratefully acknowledged the support of Romanian Ministry of Education and Research under Project PN II, ID-1102.

PY - 2008/5/5

Y1 - 2008/5/5

N2 - Enthalpy of activation for proton exchange processes in fully hydrated hybrid sulfonated poly(ether ether ketone)-silica (SPEEK/SiO2) membranes were measured from the 1H NMR spectra under magic angle sample spinning (MAS). For the first time Eyring function is used for this purpose. Two exchange processes between different water pools were detected. The isotropic chemical shift of the 1H spectrum allows us to obtain information about the normalized enthalpy of activation characterizing the water exchange. These results show that the proton exchange membranes performances could be improved by addition of small concentrations of silica in the range of 5-10 wt.%.

AB - Enthalpy of activation for proton exchange processes in fully hydrated hybrid sulfonated poly(ether ether ketone)-silica (SPEEK/SiO2) membranes were measured from the 1H NMR spectra under magic angle sample spinning (MAS). For the first time Eyring function is used for this purpose. Two exchange processes between different water pools were detected. The isotropic chemical shift of the 1H spectrum allows us to obtain information about the normalized enthalpy of activation characterizing the water exchange. These results show that the proton exchange membranes performances could be improved by addition of small concentrations of silica in the range of 5-10 wt.%.

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Proton exchange in hybrid sulfonated poly(ether ether ketone)-silica membranes by ¹H solid-state NMR

Abstract

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