In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 12 ( 2022), p. 6499-6507
Abstract:
Covalent organic frameworks (COFs) have attracted much attention in the field of high-temperature anhydrous proton conduction due to their high specific surface area and ordered one-dimensional nanochannels. Herein, a high density sulfonic acid (–SO 3 H) functionalized proton conducting COF (TB-COF) was designed and synthesized via anchoring of sulfonic acid groups on the pore walls as a proton source. To the best of our knowledge, the synthesized TB-COF presents the highest intrinsic proton conductivity (1.52 × 10 −4 S cm −1 at 120 °C) reported, due to the presence of high density –SO 3 H groups on the ordered 1D nanochannels. Further incorporation of a protic ionic liquid (PIL), 1-methyl-3-(3-sulfopropyl) imidazolium hydrogensulphate ([PSMIm][HSO 4 ]), into the TB-COF greatly improved its proton conductivity to 2.21 × 10 −3 S cm −1 at 120 °C. Moreover, density functional theory (DFT) calculations proved the directional migration of protons along the stacked nanochannels of the COFs with the assistance of O atoms on the keto groups. This work provides innovative structural design ideas and performance improvement methods for COFs as proton conducting materials.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702232-8
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