Liquid and Glass Phases of an Alkylguanidinium Sulfonate Hydrogen-Bonded Organic 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...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2022-06, Vol.144 (25), p.11064-11068
Main Authors: Slavney, Adam H., Kim, Hong Ki, Tao, Songsheng, Liu, Mengtan, Billinge, Simon J. L., Mason, Jarad A.
Format: Article
Language:English
Subjects:
Amorphous materials
Cations
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Crystal structure
Liquids
Melting
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Summary: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 °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.
ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.2c02918