Fluorinated Metal–Organic Frameworks: Hydrophobic Nanospaces with High Fluorine Density and Proton Conductivity

IF 5.8 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nanoscale Pub Date : 2025-03-14 DOI:10.1039/d5nr00342c

Ryota Akai, Hitoshi Kasai, Kouki Oka

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引用次数: 0

Abstract

The current work revealed the relationship between the fluorine density of organic-based porous materials and water dynamics (proton conduction) in the hydrophobic nanospace. In detail, focusing on UiO-66 with structural durability at high temperature/humidity based on strong Zr–O bonds, we prepared UiO-66-CF₃ and UiO-66-(CF₃)₂ with different fluorine densities. The activation energies for proton conduction of UiO-66-CF₃ (0.91 eV) and UiO-66-(CF₃)₂ (1.38 eV) were significantly larger than in UiO-66 (0.47 eV) depending on their fluorine density. Introducing fluorine into organic-based porous materials allowed hydrophobic nanospace to interact with protons, yielding a larger energy for proton conduction (activation energy). The fluorine density and activation energy were proportional. We clarified that the activation energy of proton conduction increased proportionally with the fluorine density in the nanospace. This indicated the possibility that the state of proton/water in the nanospace could be freely controlled by the fluorine density.

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来源期刊

Nanoscale CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

12.10

自引率

3.00%

发文量

1628

审稿时长

1.6 months

期刊介绍： Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.