发表机构
University of Oxford; Technische Universität Dortmund; University of Vienna; Science and Technology Facility Council, UKRI; Diamond Light Source（牛津大学; 多特蒙德工业大学; 维也纳大学; 英国研究与创新署科学技术设施委员会; 钻石光源）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过多模态多尺度表征，合成了高韧性铜基MOF玻璃，其弹性模量约10 GPa、断裂韧性达0.5 MPa·m^1/2，为MOF基材料加工领域提供了关键进展。
AI 中文摘要
采用溶胶-凝胶法合成了铜基金属有机框架Cu(Im)₂，该材料在加热至240℃以上时经熔融淬火形成玻璃。本研究对该MOF纳米晶体及其形成的玻璃进行了多模态、多尺度表征：利用X射线衍射、原子力显微镜和电子显微镜分析合成的纳米晶体及玻璃的形貌与尺寸；通过热重分析和差示扫描量热法研究晶体熔融形成玻璃的过程；借助同步辐射对分布函数分析验证熔融后框架结构得以保持，近场红外纳米光谱则为材料的局部化学结构提供了见解。纳米压痕力学表征显示，所得玻璃具有显著高的弹性模量（约10 GPa），且断裂韧性K₁c约为0.5 MPa·m^1/2，是目前已报道的MOF玻璃中最高值。该进展对新兴的MOF基材料加工与成型领域至关重要，同时保持了机械强度和抗开裂性能。
英文摘要
A copper-based metal-organic framework, Cu(Im)2, was synthesized using a sol-gel process and subsequently melt-quenched into glass upon heating above 240 °C. In this paper, we present a multimodal, multiscale interrogation of the MOF nanocrystals and the resulting glasses. Structural characterization using X-ray diffraction, atomic force microscopy, and electron microscopy was performed to understand the morphology and size of the synthesized nanocrystals and glasses. Thermogravimetric analysis and differential scanning calorimetry were employed to understand the melting process of the crystals to form the glass. Synchrotron pair distribution function analysis was performed to verify that the framework structure is maintained upon melting, and nearfield infrared nanospectroscopy provided insight into the local chemical structure of the materials. The mechanical characterization via nanoindentation revealed that the resulting glasses exhibit an appreciably high elastic modulus (~10 GPa) and the highest fracture toughness (K_1c ~ 0.5 MPa m^1/2) yet reported for MOF glasses. This development is central to the emerging field of MOF-based materials processing and shaping, while upholding mechanical robustness and resistance to cracking.
Comments26 pages, 6 figures, supporting information
