Computational Characterization of Defects in Metal–Organic Frameworks: Spontaneous and Water-Induced Point Defects in ZIF-8
Journal Article
·
· Journal of Physical Chemistry Letters
- Univ. of Wisconsin, Madison, WI (United States)
- Georgia Inst. of Technology, Atlanta, GA (United States)
Zeolitic imidazolate frameworks (ZIFs) are an important class of porous crystalline metal–organic framework (MOF) materials that have attracted widespread attention for applications ranging from gas adsorption and separation to catalysis. Although the bulk crystal structures of MOFs are typically well-characterized, comparatively little is known regarding MOF defect structures. Drawing on analogies with conventional silicon-based zeolites, we utilize computational methods to examine the structure and stability of putative point-defect structures (including vacancies, substitutions, and “dangling” linkers) within the prototypical ZIF-8 structure. Considering both postsynthetic (gas-phase) and synthetic (solution-phase) conditions, we find that several of the defect structures lie low in energy relative to the defect-free parent crystal, with barriers to defect formation that are large but surmountable under relevant temperatures. Furthermore, these results are consistent with prior experimental observations of ZIF stability and reactivity and suggest that defects may play an important role in influencing the long-term stability of MOFs under conditions that include exposure to water vapor and trace contaminants such as acid gases.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Understanding and Control of Acid Gas-induced Evolution of Materials for Energy (UNCAGE-ME)
- Sponsoring Organization:
- National Science Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); UW-Madison Center for High Throughput Computing (CHTC)
- Grant/Contract Number:
- SC0012577
- OSTI ID:
- 1371131
- Journal Information:
- Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Journal Issue: 3 Vol. 7; ISSN 1948-7185
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Computational Model and Characterization of Stacking Faults in ZIF-8 Polymorphs
Assessing the Impact of Point Defects on Molecular Diffusion in ZIF-8 Using Molecular Simulations
Acid Gas Stability of Zeolitic Imidazolate Frameworks: Generalized Kinetic and Thermodynamic Characteristics
Journal Article
·
Thu Nov 10 19:00:00 EST 2016
· Journal of Physical Chemistry. C
·
OSTI ID:1388752
Assessing the Impact of Point Defects on Molecular Diffusion in ZIF-8 Using Molecular Simulations
Journal Article
·
Sat Jun 23 20:00:00 EDT 2018
· Journal of Physical Chemistry Letters
·
OSTI ID:1470674
Acid Gas Stability of Zeolitic Imidazolate Frameworks: Generalized Kinetic and Thermodynamic Characteristics
Journal Article
·
Mon May 28 20:00:00 EDT 2018
· Chemistry of Materials
·
OSTI ID:1439424
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
carbon capture
catalysis (heterogeneous)
defects
density functional theory
imidazolate framework
materials and chemistry by design
membrane
substitution
synthesis (novel materials)
synthesis (scalable processing)
synthesis (self-assembly)
vacancy
zeolitic
carbon capture
catalysis (heterogeneous)
defects
density functional theory
imidazolate framework
materials and chemistry by design
membrane
substitution
synthesis (novel materials)
synthesis (scalable processing)
synthesis (self-assembly)
vacancy
zeolitic