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- W2089239249 abstract "Abstract A systematic study on alkyl urocanates related to the proton conductivity performances to clarify the role of molecular mobility and hydrogen bond in proton transfer is carried out. Depending on the methylene units, the melting (Tm) and degradation temperatures (Td) change remarkably. When methylene unit is four, C4U shows the lowest melting point (as low as 46 °C) and this suggests the favorable molecular mobility in the molten state. The short hydrogen bond distance and the short T1 relaxation time lead to a scheme of proton conductivity of C4U to be under a regular imidazole arrangement with highly active alkyl chain molecular motion. When C4U is in molten state, the proton transfer is under vehicle mechanism clarified by Volgel–Tammann–Fulcher (VTF) equation. By applying C4U as a proton conductive additive in a sulfonated poly(ether ether ketone) (SPEEK) membrane without any acid dopants, the proton conductivity in the heating process up to 170 °C continuously increases to be ∼104 times higher than that of the neat SPEEK. The present work not only demonstrates the thermal mobility as a key factor to govern the proton conductivity but also proposes the effective proton transfer of heterocyclic compounds based on the molten state." @default.
- W2089239249 created "2016-06-24" @default.
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- W2089239249 date "2014-03-01" @default.
- W2089239249 modified "2023-10-16" @default.
- W2089239249 title "Molecular mobility of imidazoles in molten state as a key factor to enhance proton conductivity" @default.
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- W2089239249 doi "https://doi.org/10.1016/j.jpowsour.2013.10.126" @default.
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