Journal article
Compositional inhomogeneity and tuneable thermal expansion in mixed-metal ZIF-8 analogues
- Abstract:
- We study the structural and thermomechanical effects of cation substitution in the compositional family of metal–organic frameworks Zn1−xCdx(mIm)2 (HmIm = 2-methylimidazole). We find complete miscibility for all compositions x, with evidence of inhomogeneous distributions of Cd and Zn that in turn affect framework aperture characteristics. Using variable-temperature X-ray powder diffraction measurements, we show that Cd substitution drives a threefold reduction in the magnitude of thermal expansion behaviour. We interpret this effect in terms of an increased density of negative thermal expansion modes in the more flexible Cd-rich frameworks.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
-
-
(Preview, Accepted manuscript, pdf, 1.7MB, Terms of use)
-
- Publisher copy:
- 10.1039/c8cc04172e
Authors
+ Engineering and Physical Sciences Research Council
More from this funder
- Funding agency for:
- Geddes, H
- Grant:
- Studentship
- Publisher:
- Royal Society of Chemistry
- Journal:
- Chemical Communications More from this journal
- Volume:
- 54
- Issue:
- 69
- Pages:
- 9651-9654
- Publication date:
- 2018-08-01
- Acceptance date:
- 2018-08-01
- DOI:
- EISSN:
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1364-548X
- ISSN:
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1359-7345
- Pmid:
-
30101236
- Language:
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English
- Pubs id:
-
pubs:907299
- UUID:
-
uuid:2c757fdd-69ef-4092-ad95-29a165e09a1f
- Local pid:
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pubs:907299
- Source identifiers:
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907299
- Deposit date:
-
2018-09-13
- ARK identifier:
Terms of use
- Copyright holder:
- Sapnik et al
- Copyright date:
- 2018
- Notes:
- This is the accepted manuscript version of the article. The final version is available online from the Royal Society of Chemistry at: https://doi.org/10.1039/c8cc04172e
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