期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 144, 期 25, 页码 11064-11068出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.2c02918
关键词
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资金
- Arnold and Mabel Beckman Foundation through a Beckman Young Investigator Grant
- Arnold and Mabel Beckman Foundation through a Beckman Postdoctoral Fellowship
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0012704]
- U.S. Department of Energy [DE-SC0021145]
- U.S. Department of Energy (DOE) [DE-SC0021145] Funding Source: U.S. Department of Energy (DOE)
Glassy phases of framework materials offer unique and tunable properties for various applications. A new guanidinium organosulfonate hydrogen-bonded organic framework (HOF) has been discovered, which demonstrates melting and vitrification below 100 degrees C. Non-covalent interactions between guest molecules and the porous framework play a crucial role in the overall stability of the structure, leading to guest-dependent transitions. Through simulations and X-ray scattering, it is found that the local structures of the amorphous liquid and glass phases resemble those of the parent crystalline framework.
Glassy phases of framework materials feature unique and tunable properties that are advantageous for gas separation membranes, solid electrolytes, and phase-change memory applications. Here, we report a new guanidinium organosulfonate hydrogen-bonded organic framework (HOF) that melts and vitrifies below 100 degrees C. In this low-temperature regime, non-covalent interactions between guest molecules and the porous framework become a dominant contributor to the overall stability of the structure, resulting in guest-dependent melting, glass, and recrystallization transitions. Through simulations and X-ray scattering, we show that the local structures of the amorphous liquid and glass phases resemble those of the parent crystalline framework.
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