Dual-Acid-Tailored Ionic Covalent Organic Frameworks for High-Temperature Proton Conduction under Anhydrous Conditions and the Practical Opportunities

IF 7.2 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Chemistry of Materials Pub Date : 2025-03-27 DOI:10.1021/acs.chemmater.5c00016

Vellaichamy Joseph, Keiichiro Maegawa, Mateusz Wlazło, Marek J. Potrzebowski, Krzysztof Łyczko, Atsushi Nagai

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引用次数: 0

Abstract

An organic salt (DMAP/Pa-SO₃H) composed of 2,5-diaminiobenzenesulfonic acid (Pa-SO₃H) and dimethylaminopyridine (DMAP) was demonstrated as a linker to construct ionic covalent organic frameworks (iCOFs). The iCOF denoted as TpDMAP/Pa-SO₃H was prepared by the condensation reaction of the triformylphloroglucinol (Tp) building block and DMAP/Pa-SO₃H and offers the potential to accommodate an external proton source (H₃PO₄; PA), enabling the immobilization of PA moieties within the pore structure through a strong ionic hydrogen bonding interaction evidenced by DFT calculations. Furthermore, H₃PO₄-doped iCOF denoted as PA@TpDMAP/Pa-SO₃H proclaimed the advantage of engineering at the linker position, which in turn promotes proton conductivity to 1.56 × 10^–2 S cm^–1 (increased 100-fold as related to PA@TpPa-SO₃H) at 140 °C under anhydrous conditions. Finally, we investigated the adaptability of a dual-acid system in sulfonated poly(ether ether ketone) (SPEEK) membranes, a common acid-modified polymeric material. PA-doped DMAP-modified SPEEK (PA@SPEEK/DMAP) evidenced a 100-fold appreciation of proton conductivity at 120 °C, as compared to bare SPEEK membranes under anhydrous conditions.

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来源期刊

Chemistry of Materials 工程技术-材料科学：综合

CiteScore

14.10

自引率

5.80%

发文量

929

审稿时长

1.5 months

期刊介绍： The journal Chemistry of Materials focuses on publishing original research at the intersection of materials science and chemistry. The studies published in the journal involve chemistry as a prominent component and explore topics such as the design, synthesis, characterization, processing, understanding, and application of functional or potentially functional materials. The journal covers various areas of interest, including inorganic and organic solid-state chemistry, nanomaterials, biomaterials, thin films and polymers, and composite/hybrid materials. The journal particularly seeks papers that highlight the creation or development of innovative materials with novel optical, electrical, magnetic, catalytic, or mechanical properties. It is essential that manuscripts on these topics have a primary focus on the chemistry of materials and represent a significant advancement compared to prior research. Before external reviews are sought, submitted manuscripts undergo a review process by a minimum of two editors to ensure their appropriateness for the journal and the presence of sufficient evidence of a significant advance that will be of broad interest to the materials chemistry community.