%0 Electronic Article
%A Cao, Fengming
%A Sørensen, Søren Strandskov
%A Christensen, Anders K. R.
%A Mollick, Samraj
%A Ge, Xuan
%A Sun, Daming
%A Nielsen, Anders B.
%A Nielsen, Niels Christian
%A Kristensen, Peter K.
%A Jensen, Lars R.
%A Dallari, Francesco
%A Baglioni, Jacopo
%A Monaco, Giulio
%A Karlsen, Martin A.
%A Baran, Volodymyr
%A Smedskjaer, Morten M.
%T Continuous structure modification of metal- organic framework glasses via halide salts
%M PUBDB-2024-06161
%D 2024
%X 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. 
%F PUB:(DE-HGF)25
%9 Preprint
%R 10.26434/chemrxiv-2024-bgf8b
%U https://bib-pubdb1.desy.de/record/615554