Enhanced proton conductivity promoted by structural transition in a 2D interwoven metal-organic framework

Xi Chen; Nippich Kaeosamut; Sergei Sapchenko; Xue Han; Qingqing  Mei; Ming Li; Inigo J Vitorica-Yrezabal; Lewis Hughes; Sihai Yang; Martin Schröder

doi:10.1021/acs.cgd.4c01279

Enhanced proton conductivity promoted by structural transition in a 2D interwoven metal-organic framework

Xi Chen, Nippich Kaeosamut, Sergei Sapchenko, Xue Han, Qingqing Mei, Ming Li, Inigo J Vitorica-Yrezabal, Lewis Hughes, Sihai Yang, Martin Schröder

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Abstract

We report enhanced proton conductivity promoted by a structural phase transition of MFM-504(Cu)-DMF to MFM-504(Cu)-MeOH and to MFM-504(Cu)-OH via ligand substitution upon exposure to MeOH and H2O vapours, respectively. MFM-504(Cu)-DMF can be synthesised by solvothermal reaction of Cu(NO3)2-3H2O and the flexible zwitterionic ligand, imidazolium-1,3-bis(methylenedicarboxylate) (imidc-), to afford a unique layered interwoven network structure. MFM-504(Cu)-OH shows a proton conductivity of 5.01×10-4 S cm-1 at 80 °C and 99% relative humidity (RH) with an activation energy (Ea) of 0.80 eV, indicating a Vehicle mechanism within MFM-504(Cu)-OH.

Original language	English
Pages (from-to)	281–286
Journal	Crystal Growth & Design
Volume	25
Issue number	2
Early online date	24 Dec 2024
DOIs	https://doi.org/10.1021/acs.cgd.4c01279
Publication status	Published - 15 Jan 2025

Keywords

MOFs
proton conductivity
structural phase transition
ionic liquid
impedance spectroscopy

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10.1021/acs.cgd.4c01279Licence: CC BY

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title = "Enhanced proton conductivity promoted by structural transition in a 2D interwoven metal-organic framework",

abstract = "We report enhanced proton conductivity promoted by a structural phase transition of MFM-504(Cu)-DMF to MFM-504(Cu)-MeOH and to MFM-504(Cu)-OH via ligand substitution upon exposure to MeOH and H2O vapours, respectively. MFM-504(Cu)-DMF can be synthesised by solvothermal reaction of Cu(NO3)2-3H2O and the flexible zwitterionic ligand, imidazolium-1,3-bis(methylenedicarboxylate) (imidc-), to afford a unique layered interwoven network structure. MFM-504(Cu)-OH shows a proton conductivity of 5.01×10-4 S cm-1 at 80 °C and 99% relative humidity (RH) with an activation energy (Ea) of 0.80 eV, indicating a Vehicle mechanism within MFM-504(Cu)-OH. ",

keywords = "MOFs, proton conductivity, structural phase transition, ionic liquid, impedance spectroscopy",

author = "Xi Chen and Nippich Kaeosamut and Sergei Sapchenko and Xue Han and Qingqing Mei and Ming Li and Vitorica-Yrezabal, {Inigo J} and Lewis Hughes and Sihai Yang and Martin Schr{\"o}der",

year = "2025",

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day = "15",

doi = "10.1021/acs.cgd.4c01279",

language = "English",

volume = "25",

pages = "281–286",

journal = "Crystal Growth & Design",

issn = "1528-7483",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Enhanced proton conductivity promoted by structural transition in a 2D interwoven metal-organic framework

AU - Chen, Xi

AU - Kaeosamut, Nippich

AU - Sapchenko, Sergei

AU - Han, Xue

AU - Mei, Qingqing

AU - Li, Ming

AU - Vitorica-Yrezabal, Inigo J

AU - Hughes, Lewis

AU - Yang, Sihai

AU - Schröder, Martin

PY - 2025/1/15

Y1 - 2025/1/15

N2 - We report enhanced proton conductivity promoted by a structural phase transition of MFM-504(Cu)-DMF to MFM-504(Cu)-MeOH and to MFM-504(Cu)-OH via ligand substitution upon exposure to MeOH and H2O vapours, respectively. MFM-504(Cu)-DMF can be synthesised by solvothermal reaction of Cu(NO3)2-3H2O and the flexible zwitterionic ligand, imidazolium-1,3-bis(methylenedicarboxylate) (imidc-), to afford a unique layered interwoven network structure. MFM-504(Cu)-OH shows a proton conductivity of 5.01×10-4 S cm-1 at 80 °C and 99% relative humidity (RH) with an activation energy (Ea) of 0.80 eV, indicating a Vehicle mechanism within MFM-504(Cu)-OH.

AB - We report enhanced proton conductivity promoted by a structural phase transition of MFM-504(Cu)-DMF to MFM-504(Cu)-MeOH and to MFM-504(Cu)-OH via ligand substitution upon exposure to MeOH and H2O vapours, respectively. MFM-504(Cu)-DMF can be synthesised by solvothermal reaction of Cu(NO3)2-3H2O and the flexible zwitterionic ligand, imidazolium-1,3-bis(methylenedicarboxylate) (imidc-), to afford a unique layered interwoven network structure. MFM-504(Cu)-OH shows a proton conductivity of 5.01×10-4 S cm-1 at 80 °C and 99% relative humidity (RH) with an activation energy (Ea) of 0.80 eV, indicating a Vehicle mechanism within MFM-504(Cu)-OH.

KW - MOFs

KW - proton conductivity

KW - structural phase transition

KW - ionic liquid

KW - impedance spectroscopy

U2 - 10.1021/acs.cgd.4c01279

DO - 10.1021/acs.cgd.4c01279

M3 - Article

SN - 1528-7483

VL - 25

SP - 281

EP - 286

JO - Crystal Growth & Design

JF - Crystal Growth & Design

IS - 2

ER -

Enhanced proton conductivity promoted by structural transition in a 2D interwoven metal-organic framework

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Keywords

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