![]() The synthesis of trianglimines: on the scope and limitations of the cyclocondensation reaction between (1R,2R)-diaminocyclohexane and aromatic dicarboxaldehydes. Stability and electronic properties of 3D covalent organic frameworks. DFTB +, a sparse matrix-based implementation of the DFTB method. 1 H-1,2,4-triazole: an effective solvent for proton-conducting electrolytes. Protonic conductivity in imidazole single crystal. Room temperature synthesis of covalent-organic framework films through vapor-assisted conversion. Rapid and efficient redox processes within 2D covalent organic framework thin films. Stable, crystalline, porous, covalent organic frameworks as a platform for chiral organocatalysts. A superacid-catalyzed synthesis of porous membranes based on triazine frameworks for CO2 separation. Porous, covalent triazine-based frameworks prepared by ionothermal synthesis. Phosphoric acid loaded azo (–N = N–) based covalent organic framework for proton conduction. Oriented 2D covalent organic framework thin films on single-layer graphene. Porous, crystalline, covalent organic frameworks. Anhydrous proton conduction at 150 ☌ in a crystalline metal-organic framework. One-dimensional imidazole aggregate in aluminium porous coordination polymers with high proton conductivity. Covalent organic frameworks: crossing the channel. ![]() ![]() Parallel cylindrical water nanochannels in Nafion fuel-cell membranes. Maffeo, C., Bhattacharya, S., Yoo, J., Wells, D. Coordination-chemistry control of proton conductivity in the iconic metal-organic framework material HKUST-1. Superprotonic conductivity in a highly oriented crystalline metal-organic framework nanofilm. Xu, G., Otsubo, K., Yamada, T., Sakaida, S. Proton conduction in metal-organic frameworks and related modularly built porous solids. Ion conductivity and transport by porous coordination polymers and metal-organic frameworks. Proton conduction with metal-organic frameworks. Locally and densely sulfonated poly(ether sulfone)s as proton exchange membrane. Sulfonated polybenzimidazoles for high temperature PEM fuel cells. Sulfonated poly(aryl ether ketone)s containing the hexafluoroisopropylidene diphenyl moiety prepared by direct copolymerization, as proton exchange membranes for fuel cell application. Synthesis, proton conductivity, and water stability of polyimides from 4,4’-diaminodiphenyl ether-2,2’-disulfonic acid. Novel sulfonated polyimides as polyelectrolytes for fuel cell application. Sulfonated aromatic hydrocarbon polymers as proton exchange membranes for fuel cells. Our results reveal a platform based on porous covalent organic frameworks for proton conduction. Temperature-dependent and isotopic experiments revealed that the proton transport in these channels is controlled by a low-energy-barrier hopping mechanism. The frameworks achieve proton conductivities that are 2–4 orders of magnitude higher than those of microporous and non-porous polymers. The frameworks are designed to constitute hexagonally aligned, dense, mesoporous channels that allow for loading of N-heterocyclic proton carriers. Here, we demonstrate proton conduction across mesoporous channels in a crystalline covalent organic framework. However, most studies are still based on a preconception that large pores eventually cause simply flow of proton carriers rather than efficient conduction of proton ions, which precludes the exploration of large-pore polymers for proton transport. ![]() Progress over the past decades in proton-conducting materials has generated a variety of polyelectrolytes 1, 2, 3, 4, 5 and microporous polymers 6, 7, 8, 9, 10. ![]()
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