Journal Article

PUBDB-2025-03551

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Continuous structure modification of metal-organic framework glasses via halide salts

Cao, F.Extern* ; Strandskov Soerensen, S. (Corresponding author)Extern* ; Christensen, A. K. R.Extern* ; Mollick, S.Extern* ; Ge, X.Extern* ; Sun, D.Extern* ; Nielsen, A. B. ; Nielsen, N. C. ; Lock, N.Extern* ; Lu, R.Extern* ; Klemmt, R.Extern* ; Kristensen, P. K. ; Jensen, L. R. ; Dallari, F.Extern* ; Baglioni, J.Extern* ; Monaco, G.Extern* ; Karlsen, M. A.Extern*DESY* ; Baran, V.Extern*DESY* ; Smedskjaer, M. M. (Corresponding author)Extern*

2025
Springer Nature [London]

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Please use a persistent id in citations: doi:10.1038/s41467-025-62143-9  doi:10.3204/PUBDB-2025-03551

Abstract: 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, e.g., 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 improved functionalities.

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Contributing Institute(s):

1. Experimentebetreuung PETRA III (FS-PET-D)
2. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20230857 EC (I-20230857-EC) (I-20230857-EC)
4. NewGLASS - New Horizons in Glass Structure Prediction and Mechanics (101044664) (101044664)

Experiment(s):

1. PETRA Beamline P02.1 (PETRA III)

Appears in the scientific report 2025

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