Polybenzimidazolium hydroxides - Structure, stability and degradation

被引：101

作者：

Henkensmeier, Dirk ^{[1
]}

Cho, Hyeong-Rae ^{[1
]}

Kim, Hyoung-Juhn ^{[1
]}

Kirchner, Carolina Nunes ^{[2
]}

Leppin, Janine ^{[2
]}

Dyck, Alexander ^{[2
]}

Jang, Jong Hyun ^{[1
]}

Cho, EunAe ^{[1
]}

Nam, Suk-Woo ^{[1
]}

Lim, Tae-Hoon ^{[1
]}

机构：

[1] Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 136791, South Korea

[2] Carl von Ossietzky Univ Oldenburg, Fuel Cells Div, NEXT ENERGY, EWE Forschungszentrum Energietechnol eV, D-26129 Oldenburg, Germany

来源：

POLYMER DEGRADATION AND STABILITY | 2012年 / 97卷 / 03期

关键词：

2-Phenyl-imidazolium hydroxide; NMR; Hydrolysis; Polybenzimidazole; Anion exchange membrane; Polymer electrolyte; EXCHANGE MEMBRANE; FUEL-CELLS; IONOMER;

D O I：

10.1016/j.polymdegradstab.2011.12.024

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polybenzimidazolium hydroxides are of potential interest for the use in alkaline anion exchange membrane fuel cells (AAEMFC). Introduction of an ether group in para-position of the 2-phenyl substituent improves the mesomeric stabilization of imidazolium cations, and O-PBI seems to be more stable than meta-PBI under alkaline conditions. NMR, IR and XPS analysis show a structural change when the iodide form is exchanged into the hydroxide form. Surprisingly, this structural change is subject to a pH sensitive equilibrium and the pure imidazolium form is retained immediately when the pH is lowered. The molecular structure at high pH is either the 2-carbinol or the amine-amide. Further hydrolysis necessitates excess hydroxide. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：264 / 272

页数：9

共 28 条

[1] Looking for stable carbenes: The difficulty in starting anew [J].

Arduengo, AJ .

ACCOUNTS OF CHEMICAL RESEARCH, 1999, 32 (11) :913-921

[2] Novel ETFE based radiation grafted poly(styrene sulfonic acid-co-methacrylonitrile) proton conducting membranes with increased stability [J].

Ben youcef, Hicham ;

Gubler, Lorenz ;

Guersel, Selmiye Alkan ;

Henkensmeier, Dirk ;

Wokaun, Alexander ;

Scherer, Guenther G. .

ELECTROCHEMISTRY COMMUNICATIONS, 2009, 11 (05) :941-944

[3] SYNTHESIS AND CHARACTERIZATION OF POLYBENZIMIDAZOLES CARRYING ADDITIONAL PYRIDINE AND IMIDAZOLE GROUPS IN THE MAIN CHAIN [J].

BROCK, T ;

SHERRINGTON, DC ;

TANG, HG .

POLYMER, 1991, 32 (02) :353-357

[4] Fast and accurate algorithm for the simulation of NMR spectra of large spin systems [J].

Castillo, Andres M. ;

Patiny, Luc ;

Wist, Julien .

JOURNAL OF MAGNETIC RESONANCE, 2011, 209 (02) :123-130

[5] Towards a Molecular Understanding of Cation-Anion Interactions-Probing the Electronic Structure of Imidazolium Ionic Liquids by NMR Spectroscopy, X-ray Photoelectron Spectroscopy and Theoretical Calculations [J].

Cremer, Till ;

Kolbeck, Claudia ;

Lovelock, Kevin R. J. ;

Paape, Natalia ;

Woelfel, Rene ;

Schulz, Peter S. ;

Wasserscheid, Peter ;

Weber, Henry ;

Thar, Jens ;

Kirchner, Barbara ;

Maier, Florian ;

Steinrueck, Hans-Peter .

CHEMISTRY-A EUROPEAN JOURNAL, 2010, 16 (30) :9018-9033

[6] A short synthesis of phenanthro[2,3-d]imidazoles from dehydroabietic acid.: Application of the methodology as a convenient route to benzimidazoles [J].

Fonseca, T ;

Gigante, B ;

Gilchrist, TL .

TETRAHEDRON, 2001, 57 (09) :1793-1799

[7] Reactive recrystallization of sodium bicarbonate [J].

Gärtner, RS ;

Seckler, MM ;

Witkamp, GJ .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2005, 44 (12) :4272-4283

[8] A Soluble and Highly Conductive Ionomer for High-Performance Hydroxide Exchange Membrane Fuel Cells [J].

Gu, Shuang ;

Cai, Rui ;

Luo, Ting ;

Chen, Zhongwei ;

Sun, Minwei ;

Liu, Yan ;

He, Gaohong ;

Yan, Yushan .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2009, 48 (35) :6499-6502

[9] Synthesis and characterization of novel anion exchange membranes based on imidazolium-type ionic liquid for alkaline fuel cells [J].

Guo, Mingli ;

Fang, Jun ;

Xu, Hankun ;

Li, Wei ;

Lu, Xiaohuan ;

Lan, Chunhua ;

Li, Kunyuan .

JOURNAL OF MEMBRANE SCIENCE, 2010, 362 (1-2) :97-104

[10] IONIZATION (HETEROLYSIS) OF COVALENT COMPOUNDS AS A COORDINATION-CHEMICAL PHENOMENON [J].

GUTMANN, V .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 1970, 9 (11) :843-+

← 1 2 3 →