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Real-time observation of the exchange process between H2O and NO in the metal–organic framework Ni-MOF-74

Journal Article · · Journal of Materials Chemistry. A
DOI:https://doi.org/10.1039/d3ta05265f· OSTI ID:2309836
 [1];  [2];  [3];  [2];  [4];  [5]
  1. Wake Forest University, Winston-Salem, NC (United States); UNIVERSITY OF NORTH TEXAS
  2. Rutgers University, Piscataway, NJ (United States)
  3. University of Texas at Dallas, Richardson, TX (United States)
  4. Wake Forest University, Winston-Salem, NC (United States)
  5. University of North Texas, Denton, TX (United States)
Molecular exchange is a common step occurring in many technological processes such as competitive adsorption, chemical separation, capture, delivery, and release. However, the underlying principle is not fully understood, especially in nanoconfined environments where the energetics and kinetics of such processes can deviate from that on flat surfaces. In this study, we unravel the mechanism of a molecular exchange process by studying the displacement of NO by H2O in Ni-MOF-74 in real-time using in situ infrared spectroscopy combined with ab initio calculations. We show that weakly bound H2O gradually displaces strongly bound NO on the metal sites by first weakening the M–N bond through forming H-bond and then moving the NO away so that it eventually desorbs. Interestingly, we further find that additional water facilitates this exchange by significantly lowering the kinetic barrier associated with this process as well as the overall energy of the final state. Although our study focuses on Ni-MOF-74, we believe that our finding and explanation of unexpected exchange phenomena—where strongly adsorbed molecules are apparently easily displaced by much weaker bound H2O—is applicable to a much larger group of frameworks and will be helpful in designing and improving MOFs for real-world applications where humidity is often present.
Research Organization:
University of North Texas, Denton, TX (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019902
OSTI ID:
2309836
Alternate ID(s):
OSTI ID: 2282206
Journal Information:
Journal of Materials Chemistry. A, Journal Name: Journal of Materials Chemistry. A Journal Issue: 12 Vol. 12; ISSN 2050-7488
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

References (37)

Metal-Organic Framework (MOF)-Based Drug/Cargo Delivery and Cancer Therapy journal March 2017
Metal-Organic Frameworks for Separation journal March 2018
Exploration of porous metal–organic frameworks for gas separation and purification journal January 2019
C2s/C1 hydrocarbon separation: The major step towards natural gas purification by metal-organic frameworks (MOFs) journal September 2021
Microporous Metal-Organic Framework Materials for Gas Separation journal February 2020
Adsorption of nitric oxide in metal-organic frameworks: Low temperature IR and EPR spectroscopic evaluation of the role of open metal sites journal November 2015
Competitive Coadsorption of CO 2 with H 2 O, NH 3 , SO 2 , NO, NO 2 , N 2 , O 2 , and CH 4 in M-MOF-74 (M = Mg, Co, Ni): The Role of Hydrogen Bonding journal March 2015
Competitive Binding of Ethylene, Water, and Carbon Monoxide in Metal–Organic Framework Materials with Open Cu Sites journal April 2018
Nanoscale Metal–Organic Frameworks for Biomedical Imaging and Drug Delivery journal October 2011
Potential of Metal–Organic Frameworks for Separation of Xenon and Krypton journal December 2014
Water Reaction Mechanism in Metal Organic Frameworks with Coordinatively Unsaturated Metal Ions: MOF-74 journal November 2014
Local Structure of CPO-27-Ni Metallorganic Framework upon Dehydration and Coordination of NO journal August 2008
Metal–Organic Frameworks for Separations journal September 2011
Carbon Dioxide Capture in Metal–Organic Frameworks journal September 2011
Introduction to Metal–Organic Frameworks journal September 2011
Metal–Organic Frameworks for Air Purification of Toxic Chemicals journal April 2014
Biomedical Applications of Metal Organic Frameworks journal February 2011
Unusual Hydrogen Bonding in Water-Filled Carbon Nanotubes journal September 2006
Exceptional Behavior over the Whole Adsorption−Storage−Delivery Cycle for NO in Porous Metal Organic Frameworks journal August 2008
Co-adsorption and Separation of CO 2 −CH 4 Mixtures in the Highly Flexible MIL-53(Cr) MOF journal November 2009
Porous Ti-MOF-74 Framework as a Strong-Binding Nitric Oxide Scavenger journal September 2020
Porous materials with optimal adsorption thermodynamics and kinetics for CO2 separation journal February 2013
Cooperative insertion of CO2 in diamine-appended metal-organic frameworks journal March 2015
A pressure-amplifying framework material with negative gas adsorption transitions journal April 2016
Porous metal–organic-framework nanoscale carriers as a potential platform for drug delivery and imaging journal December 2009
Destruction of chemical warfare agents using metal–organic frameworks journal March 2015
Probing the surfaces of heterogeneous catalysts by in situ IR spectroscopy journal January 2010
High-throughput screening of small-molecule adsorption in MOF journal January 2013
Improved tangent estimate in the nudged elastic band method for finding minimum energy paths and saddle points journal December 2000
A climbing image nudged elastic band method for finding saddle points and minimum energy paths journal December 2000
Highly efficient separation of carbon dioxide by a metal-organic framework replete with open metal sites journal November 2009
Hydrocarbon Separations in a Metal-Organic Framework with Open Iron(II) Coordination Sites journal March 2012
The Chemistry and Applications of Metal-Organic Frameworks journal August 2013
A metal-organic framework-based splitter for separating propylene from propane journal July 2016
Ethane/ethylene separation in a metal-organic framework with iron-peroxo sites journal October 2018
Synergistic sorbent separation for one-step ethylene purification from a four-component mixture journal October 2019
A scalable metal-organic framework as a durable physisorbent for carbon dioxide capture journal December 2021

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