Covalent organic frameworks confining ultra-dense hydrated hydrogen-bond networks for efficient intrinsic proton conduction

Abstract

Confining hydrated hydrogen bonds to generate proton channel is a promising strategy to promote the intrinsic proton conductivity, while high water-harvesting capacity is the key for proton-conducting material. Herein, by...

Engineering Interconnected Nanofluidic Channel in a Hydrogel Supernetwork toward K+ Ion Accelerating Transport and Efficient Sensing

“…Compared to the standard peak, the −OH peak slightly shifted to a lower wavenumber at 3228 cm −1 , which may indicate the formation of interactions. 34,35 In Figure 2e, a typical P 2p peak was detected in the XPS full spectra of hydrogel_30, and the fitted peak, as shown in Figure S4b, the profile, and binding energy of 133.90 eV for the P 2p peak can be indexed to PO 4 3− . It is significant that the P 2p is slightly shifted to higher binding energy (from 133.60 to 133.90 eV) as an increase in the degree of cross-linking, 36 indicating the existence of intermolecular hydrogen (PA•••H− O−C) within the hydrogel, 37 which further confirms the analysis results of the FTIR spectra.…”

“…Note that the character absorption peak gradually becomes more apparent with an increase in the degree of cross-linking, indicating that the complexation degree of the phosphate group in PA gradually increases with the hydroxyl groups and fatty ether within the hydrogel system, which can also be proved by the SEM image with a low cross-linking degree in Figure S3. Compared to the standard peak, the −OH peak slightly shifted to a lower wavenumber at 3228 cm –1 , which may indicate the formation of interactions. , …”

Superhydrophilic covalent organic frameworks accelerate photocatalytic production of hydrogen peroxide through proton channels

“…[35][36][37] In addition, these groups establish a hydrogen bonding network with water molecules inside COF channels. 38,39 This mechanism entraps water during the photocatalytic synthesis of H 2 O 2 and fosters a compact, efficient reorganization of hydrogen bonds, effecting a proton transfer conduit between liquid and solid states, and uses the abundant water molecules as a supply reservoir for protons, thereby facilitating swi proton mobility according to the Grotthuss mechanism. This accelerates the transfer of electrons and protons at the same time, which in turn accelerates the rate of photocatalytic H 2 O 2 production.…”