Guest-dependent high-pressure phenomena in a nanoporous metal-organic framework material.
The nanoporous metal?organic framework material Cu{sub 3}(1,3,5-benzenetricarboxylate){sub 2}(H{sub 2}O){sub 3} {center_dot} (guest) exhibits anomalous compression under applied pressure that is associated with the hyper-filling of the pore network. This behavior involves a dramatic transition between a 'hard' regime (bulk modulus, K{sub hard} {approx} 118 GPa), where the pressure-transmitting fluid penetrates the framework cavities, and a 'soft' regime (K{sub soft} {approx} 30 GPa), where the guest-framework system compresses concertedly. Not only is the duality in compressibility triggered by the availability of potential guests but the size/penetrability of the guest molecules determines the pressure at which the hard-soft transition occurs. Specifically, the observed compression behavior depends on the size of the pressure-transmitting fluid molecules, the sample particle size (i.e., the extent of the pore network), and the rate at which the pressure is increased. The unprecedented pressure-induced phenomena documented here, illustrates the exotic high-pressure behaviors possible in this versatile class of advanced functional materials with broad implications for their structure-function relationships and accordingly their practical application.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC; NSF
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 939331
- Report Number(s):
- ANL/XSD/JA-61729
- Journal Information:
- J. Am. Chem. Soc., Journal Name: J. Am. Chem. Soc. Journal Issue: 32 ; Aug. 13, 2008 Vol. 130; ISSN JACSAT; ISSN 0002-7863
- Country of Publication:
- United States
- Language:
- ENGLISH
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