TY  - EJOUR
AU  - Cao, Fengming
AU  - Sørensen, Søren Strandskov
AU  - Christensen, Anders K. R.
AU  - Mollick, Samraj
AU  - Ge, Xuan
AU  - Sun, Daming
AU  - Nielsen, Anders B.
AU  - Nielsen, Niels Christian
AU  - Kristensen, Peter K.
AU  - Jensen, Lars R.
AU  - Dallari, Francesco
AU  - Baglioni, Jacopo
AU  - Monaco, Giulio
AU  - Karlsen, Martin A.
AU  - Baran, Volodymyr
AU  - Smedskjaer, Morten M.
TI  - Continuous structure modification of metal- organic framework glasses via halide salts
M1  - PUBDB-2024-06161
PY  - 2024
AB  - Melting and glass formation of metal-organic frameworks (MOFs) allow them to be processed into bulk materials. However, two major challenges remain: only a small fraction of MOF crystals undergo melting and glass-formation, and no well-established strategies exist for tuning MOF glass structures and properties. Here, we address both challenges through co-melting of zeolitic imidazole frameworks (ZIFs), a subset of MOFs, with heterocycle-based halide salts. The salt acts as a chemical “modifier”, akin to the role of alkali modifiers in traditional silicate glasses, allowing the melting of ZIF-8 that otherwise decomposes prior to melting. Through experimental and computational analyses, we show that the salts depolymerize the ZIFs, enabling continuous tuning of the fraction of bridging to non-bridging imidazolate linkers and, thereby, the thermal and mechanical properties. The proposed strategy enables diversification of MOF glass chemistry, tunable structures and properties, and ultimately an increased number of glass-forming MOFs with new functionalities. 
LB  - PUB:(DE-HGF)25
DO  - DOI:10.26434/chemrxiv-2024-bgf8b
UR  - https://bib-pubdb1.desy.de/record/615554
ER  -