Unraveling the Complex Hydrogen Bonding of a Dual-Functionality Proton Conductor Using Ultrafast Magic Angle Spinning NMR

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• 作者：Jason W. Traer ; Enzo Montoneri ; Ago Samoson ; Jaan Past ; Tiit Tuherm ; Gillian R. Goward
• 刊名：Chemistry of Materials
• 出版年：2006
• 出版时间：October 3, 2006
• 年：2006
• 卷：18
• 期：20
• 页码：4747 - 4754
• 全文大小：213K
• 年卷期：v.18,no.20(October 3, 2006)
• ISSN：1520-5002

文摘

Hydrogen bonding plays a critical role in proton-conducting polymers, as it provides the networknecessary for structural (Grotthus mechanism) diffusion. This network must be both pervasive and dynamicin order for long-range proton transport to be achieved. The structural motifs must be understood, evenin amorphous materials, and moreover, the lattice energies in the structure must be low enough to allowrearrangement and mobility. To this end, a novel proton-conducting candidate, 1,10-(1-H-imidazol-5-yl)decanephosphonic acid and its HBr doped counterpart are considered from the molecular level aspotential proton-conducting membranes. The use of high-resolution solid-state ¹H NMR to elucidatestructure and dynamics of such systems is highlighted in this material. We compare our molecular-levelresults to macroscopic probes of proton transport in related polymers, achieved using impedancespectroscopy.