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Title: Anomaly in the Chain Length Dependence of n-Alkane Diffusion in ZIF-4 Metal-Organic Frameworks

Journal Article · · Molecules
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  1. Univ. Leipzig, Leipzig (Germany). Faculty of Physics and Earth Sciences
  2. Northwestern Univ., Evanston, IL (United States). Dept. of Chemical and Biological Engineering
  3. Friedrich-Alexander-Univ. Erlangen-Nürnberg, Erlangen (Germany). Erlangen Catalysis Resource Center

Molecular diffusion is commonly found to slow down with increasing molecular size. Deviations from this pattern occur in some host materials with pore sizes approaching the diameters of the guest molecules. A variety of theoretical models have been suggested to explain deviations from this pattern, but robust experimental data are scarcely available. Here in this paper, we present such data, obtained by monitoring the chain length dependence of the uptake of n-alkanes in the zeolitic imidazolate framework ZIF-4. A monotonic decrease in diffusivity from ethane to n-butane was observed, followed by an increase for n-pentane, and another decrease for n-hexane. This observation was confirmed by uptake measurements with n-butane/n-pentane mixtures, which yield faster uptake of n-pentane. Further evidence is provided by the observation of overshooting effects, i.e. by transient n-pentane concentrations exceeding the (eventually attained) equilibrium value. Accompanying grand canonical Monte Carlo simulations reveal, for the larger n-alkanes, significant differences between the adsorbed and gas phase molecular configurations, indicating strong confinement effects within ZIF-4, which, with increasing chain length, may be expected to give rise to configurational shifts facilitating molecular propagation at particular chain lengths.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States). Nanoporous Materials Genome Center
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division; German Science Foundation (DFG); Alexander von Humboldt Foundation
Grant/Contract Number:
SC0008688; HA 1893/17-1; KA 953/35-1; FG02-17ER16362
OSTI ID:
1474411
Journal Information:
Molecules, Vol. 23, Issue 3; ISSN 1420-3049
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

References (48)

The window effect in zeolitic diffusion journal November 2006
Resonant Diffusion of Normal Alkanes in Zeolites:  Effect of the Zeolite Structure and Alkane Molecule Vibrations journal November 1998
Parallel Tempering Simulations of Liquid-Phase Adsorption of n -Alkane Mixtures in Zeolite LTA-5A journal December 2010
Exploiting Framework Flexibility of a Metal–Organic Framework for Selective Adsorption of Styrene over Ethylbenzene journal April 2015
RASPA: molecular simulation software for adsorption and diffusion in flexible nanoporous materials journal February 2015
Uphill diffusion and overshooting in the adsorption of binary mixtures in nanoporous solids journal July 2015
Microimaging of transient guest profiles to monitor mass transfer in nanoporous materials journal March 2014
Commensurate Adsorption of Hydrocarbons and Alcohols in Microporous Metal Organic Frameworks journal September 2011
Computational structure characterisation tools in application to ordered and disordered porous materials journal December 2011
Diffusivities of n-Alkanes in 5A Zeolite Measured by Neutron Spin Echo, Pulsed-Field Gradient NMR, and Zero Length Column Techniques journal July 2005
Transport Phenomena in Nanoporous Materials journal August 2014
A molecular simulation study of commensurate–incommensurate adsorption of n -alkanes in cobalt formate frameworks journal October 2009
Uncommon Synergy between Adsorption and Diffusion of Hexane Isomer Mixtures in MFI Zeolite Induced by Configurational Entropy Effects journal January 2014
The first example of commensurate adsorption of atomic gas in a MOF and effective separation of xenon from other noble gases journal January 2014
Diffusion of pentane isomers in faujasite-type zeolites : NMR and molecular dynamics study journal May 2013
In-Depth Study of Mass Transfer in Nanoporous Materials by Micro-Imaging journal October 2011
DREIDING: a generic force field for molecular simulations journal December 1990
Diffusion of normal paraffins in zeolite T Occurrence of window effect journal October 1973
Scale-up of the Synthesis of Zeolitic Imidazolate Framework ZIF-4 journal September 2017
Mass Transfer in a Nanoscale Material Enhanced by an Opposing Flux journal February 2010
Understanding the Window Effect in Zeolite Catalysis journal August 2003
Levitation effect in zeolites: Quasielastic neutron scattering and molecular dynamics study of pentane isomers in zeolite NaY journal April 2010
Commensurate–incommensurate adsorption and diffusion in ordered crystalline microporous materials journal January 2017
Selective Adsorption of Water from Mixtures with 1-Alcohols by Exploitation of Molecular Packing Effects in CuBTC journal February 2015
Adsorptive Separation of Olefin/Paraffin Mixtures with ZIF-4 journal November 2015
Exceptional chemical and thermal stability of zeolitic imidazolate frameworks journal June 2006
Flexibility of zeolitic imidazolate framework structures studied by neutron total scattering and the reverse Monte Carlo method journal September 2013
Extreme Flexibility in a Zeolitic Imidazolate Framework: Porous to Dense Phase Transition in Desolvated ZIF-4 journal April 2015
The generalized Maxwell–Stefan model for diffusion in zeolites: journal August 2000
Transferable Potentials for Phase Equilibria. 1. United-Atom Description of n-Alkanes March 1998
On the Flexibility of Metal–Organic Frameworks journal January 2014
Accelerated Diffusion of Long-Chain Alkanes between Nanosized Cavities journal January 2004
Molecular Cage Nestling in the Liquid-Phase Adsorption of n -Alkanes in 5A Zeolite journal February 2007
Intracrystalline Transport Resistances in Nanoporous Zeolite X journal October 2009
Levitation Effect:  Distinguishing Anomalous from Linear Regime of Guests Sorbed in Zeolites through the Decay of Intermediate Scattering Function and Wavevector Dependence of Self-Diffusivity journal March 2005
Algorithms and tools for high-throughput geometry-based analysis of crystalline porous materials journal February 2012
Diffusion of n-paraffins in offretite-erionite type zeolites journal May 1995
Transport ofn-paraffins in zeolite T journal January 1996
Diffusion Anomaly as a Function of Molecular Length of Linear Molecules:  Levitation Effect journal June 2003
Computer Simulation of Incommensurate Diffusion in Zeolites:  Understanding Window Effects journal November 2003
Analysis of thermal effects in infrared and interference microscopy: n-Butane-5A and methanol–ferrierite systems journal August 2007
Molecular Dynamics Simulations of Alkanes in the Zeolite Silicalite:  Evidence for Resonant Diffusion Effects journal August 1997
The predictive power of classical transition state theory revealed in diffusion studies with MOF ZIF-8 journal May 2016
Accelerated Diffusion of Long-Chain Alkanes between Nanosized Cavities journal January 2004
Understanding the Window Effect in Zeolite Catalysis journal August 2003
Comparative QENS and PFG NMR diffusion studies of water in zeolite NaCaA journal September 2002
Diffusion in nanoporous materials: fundamental principles, insights and challenges journal January 2016
Incommensurate Diffusion in Confined Systems journal June 2003

Cited By (2)

New insights into the breathing phenomenon in ZIF-4 journal January 2019
Diffusion processes in a poly-crystalline zeolitic material: A molecular dynamics study journal August 2018

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