skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Pore Environment Effects on Catalytic Cyclohexane Oxidation in Expanded Fe2 (dobdc) Analogues

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.6b08417· OSTI ID:1458984
 [1];  [1];  [1];  [2]
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Here, metal–organic frameworks are a new class of heterogeneous catalysts in which molecular-level control over both the immediate and long-range chemical environment surrounding a catalytic center can be readily achieved. Here, the oxidation of cyclohexane to cyclohexanol and cyclohexanone is used as a model reaction to investigate the effect of a hydrophobic pore environment on product selectivity and catalyst stability in a series of iron-based frameworks. Specifically, expanded analogues of Fe2(dobdc) (dobdc4– = 2,5-dioxido-1,4-benzenedicarboxylate) were synthesized and evaluated, including the biphenyl derivative Fe2(dobpdc) (H4dobpdc = 4,4¢-dihydroxy-[1,1¢-biphenyl]-3,3¢-dicarboxylic acid), the terphenyl derivative Fe2(dotpdc) (H4dotpdc = 4,4¢¢-dihydroxy-[1,1¢:4¢,1¢¢-terphenyl]-3,3¢¢-dicarboxylic acid), and three modified terphenyl derivatives in which the central ring is replaced with tetrafluoro-, tetramethyl-, or di-tert-butylaryl groups. Within these five materials, a remarkable three-fold enhancement of the alcohol:ketone (A:K) ratio and an order of magnitude increase in turnover number is achieved by simply altering the framework pore diameter and installing nonpolar functional groups near the iron site. Mössbauer spectroscopy, kinetic isotope effect, and gas adsorption measurements reveal that variations in the A:K selectivities arise from differences in the cyclohexane adsorption enthalpies of these frameworks, which become more favorable as the number of hydrophobic residues and thus van der Waals interactions increases.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-12ER16362; SC0008688
OSTI ID:
1458984
Journal Information:
Journal of the American Chemical Society, Vol. 138, Issue 43; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 120 works
Citation information provided by
Web of Science

References (76)

Insights into metalloenzyme microenvironments: biomimetic metal complexes with a functional second coordination sphere journal January 2013
Supramolecular catalysis. Part 2: artificial enzyme mimics journal January 2014
Molecular Designs for Controlling the Local Environments around Metal Ions journal July 2015
Bioinspired Hydrogen Bond Motifs in Ligand Design:  The Role of Noncovalent Interactions in Metal Ion Mediated Activation of Dioxygen journal January 2005
Artificial Enzymes journal January 1996
Biomimetic Reactions Catalyzed by Cyclodextrins and Their Derivatives journal July 1998
The Use of Calixarenes in Metal-Based Catalysis journal December 2008
Selective Molecular Recognition, C−H Bond Activation, and Catalysis in Nanoscale Reaction Vessels journal April 2005
Zeolites as solid solvents1Paper presented at the International Symposium `Organic Chemistry and Catalysis' on the occasion of the 65th birthday of Prof. H. van Bekkum, Delft, Netherlands, 2–3 October 1997.1 journal September 1998
Small-Molecule H-Bond Donors in Asymmetric Catalysis journal December 2007
Role of the Secondary Coordination Sphere in Metal-Mediated Dioxygen Activation journal April 2010
The roles of the first and second coordination spheres in the design of molecular catalysts for H 2 production and oxidation journal January 2009
Catalysis of the electrochemical reduction of carbon dioxide journal January 2013
Zeolites as catalysts in oil refining journal January 2014
Solvent effects in catalysis: rational improvements of catalysts via manipulation of solvent interactions journal January 2016
Shape-Selective Catalysis in Zeolites book January 1999
State of the art and future challenges of zeolites as catalysts journal May 2003
From Microporous to Mesoporous Molecular Sieve Materials and Their Use in Catalysis journal October 1997
Design and Preparation of Organic−Inorganic Hybrid Catalysts journal October 2002
Ordered mesoporous materials in catalysis journal January 2005
Metal−Organic Frameworks with Functional Pores for Recognition of Small Molecules journal August 2010
Metal–Organic Frameworks for Separations journal September 2011
Multiple Functional Groups of Varying Ratios in Metal-Organic Frameworks journal February 2010
Mapping of Functional Groups in Metal-Organic Frameworks journal July 2013
Programmed Pore Architectures in Modular Quaternary Metal–Organic Frameworks journal November 2013
Linker Installation: Engineering Pore Environment with Precisely Placed Functionalities in Zirconium MOFs journal July 2016
Metal–organic framework materials as catalysts journal January 2009
Enantioselective catalysis with homochiral metal–organic frameworks journal January 2009
Applications of metal–organic frameworks in heterogeneous supramolecular catalysis journal January 2014
Toward “metalloMOFzymes”: Metal–Organic Frameworks with Single-Site Metal Catalysts for Small-Molecule Transformations journal May 2016
Isoreticular Chiral Metal−Organic Frameworks for Asymmetric Alkene Epoxidation: Tuning Catalytic Activity by Controlling Framework Catenation and Varying Open Channel Sizes journal November 2010
Urea Metal–Organic Frameworks as Effective and Size-Selective Hydrogen-Bond Catalysts journal February 2012
Imparting functionality to a metal–organic framework material by controlled nanoparticle encapsulation journal February 2012
Selective Dimerization of Ethylene to 1-Butene with a Porous Catalyst journal February 2016
Capturing snapshots of post-synthetic metallation chemistry in metal–organic frameworks journal September 2014
Single-Crystal-to-Single-Crystal Metalation of a Metal–Organic Framework: A Route toward Structurally Well-Defined Catalysts journal February 2015
Dioxygen Activation at Mononuclear Nonheme Iron Active Sites:  Enzymes, Models, and Intermediates journal February 2004
From simple to supramolecular cytochrome P450 mimics journal January 2000
Liquid-Phase Adsorption of Aromatics over a Metal–Organic Framework and Activated Carbon: Effects of Hydrophobicity/Hydrophilicity of Adsorbents and Solvent Polarity journal November 2015
Selective Binding of O 2 over N 2 in a Redox–Active Metal–Organic Framework with Open Iron(II) Coordination Sites journal September 2011
Hydrocarbon Separations in a Metal-Organic Framework with Open Iron(II) Coordination Sites journal March 2012
Reversible CO Binding Enables Tunable CO/H 2 and CO/N 2 Separations in Metal–Organic Frameworks with Exposed Divalent Metal Cations journal July 2014
Gradual Release of Strongly Bound Nitric Oxide from Fe 2 (NO) 2 (dobdc) journal March 2015
Oxidation of ethane to ethanol by N2O in a metal–organic framework with coordinatively unsaturated iron(II) sites journal May 2014
Toward the Synthesis of More Reactive S = 2 Non-Heme Oxoiron(IV) Complexes journal July 2015
Mechanism of Oxidation of Ethane to Ethanol at Iron(IV)–Oxo Sites in Magnesium-Diluted Fe 2 (dobdc) journal April 2015
Large-Pore Apertures in a Series of Metal-Organic Frameworks journal May 2012
Seven Post-synthetic Covalent Reactions in Tandem Leading to Enzyme-like Complexity within Metal–Organic Framework Crystals journal June 2016
Cooperative insertion of CO2 in diamine-appended metal-organic frameworks journal March 2015
Hydrogen Storage in the Expanded Pore Metal–Organic Frameworks M 2 (dobpdc) (M = Mg, Mn, Fe, Co, Ni, Zn) journal February 2016
Fast Calculation of van der Waals Volume as a Sum of Atomic and Bond Contributions and Its Application to Drug Compounds journal September 2003
To rebound or dissociate? This is the mechanistic question in C–H hydroxylation by heme and nonheme metal–oxo complexes journal January 2016
Nonheme Fe IV O Complexes That Can Oxidize the C−H Bonds of Cyclohexane at Room Temperature journal January 2004
Modeling TauD- J : A High-Spin Nonheme Oxoiron(IV) Complex with High Reactivity toward C–H Bonds journal February 2015
Evidence for an Alternative to the Oxygen Rebound Mechanism in C–H Bond Activation by Non-Heme Fe IV O Complexes journal December 2012
Mononuclear Nonheme High-Spin ( S =2) versus Intermediate-Spin ( S =1) Iron(IV)-Oxo Complexes in Oxidation Reactions journal June 2016
The Road to Non-Heme Oxoferryls and Beyond journal July 2007
The Fe(PDP)-catalyzed aliphatic C–H oxidation: a slow addition protocol journal April 2009
The Crystal Structure of a High-Spin Oxoiron(IV) Complex and Characterization of Its Self-Decay Pathway journal June 2010
Chemo- and stereoselective CH oxidations and epoxidations/cis-dihydroxylations with H2O2, catalyzed by non-heme iron and manganese complexes journal July 2012
Molecular iron complexes as catalysts for selective C–H bond oxygenation reactions journal January 2015
Oxidations of cycloalkanes and benzene by hydrogen peroxide catalyzed by an {FeIIIN2S2} centre journal January 2009
Synthesis and structural characterization of iron complexes with 2,2,2-tris(1-pyrazolyl)ethanol ligands: Application in the peroxidative oxidation of cyclohexane under mild conditions journal March 2011
Atmospheric‐Pressure, Liquid‐Phase, Selective Aerobic Oxidation of Alkanes Catalysed by Metal–Organic Frameworks journal April 2011
Cyclohexane selective oxidation over metal–organic frameworks of MIL-101 family: superior catalytic activity and selectivity journal January 2012
Superior Performance of Fe(BTC) With Respect to Other Metal-Containing Solids in the N -Hydroxyphthalimide-Promoted Heterogeneous Aerobic Oxidation of Cycloalkanes journal March 2013
Liquid phase oxidation of n-octane to C8 oxygenates over modified Fe-MOF-5 catalysts journal December 2014
Kinetic Isotope Effect is a Sensitive Probe of Spin State Reactivity in C−H Hydroxylation of N , N -Dimethylaniline by Cytochrome P450 journal January 2006
A Two-State Reactivity Model Explains Unusual Kinetic Isotope Effect Patterns in CH Bond Cleavage by Nonheme Oxoiron(IV) Complexes journal January 2009
Reactivity of High-Valent Iron–Oxo Species in Enzymes and Synthetic Reagents: A Tale of Many States journal July 2007
Evidence for Hydrogen Abstraction from C1 of Taurine by the High-Spin Fe(IV) Intermediate Detected during Oxygen Activation by Taurine:α-Ketoglutarate Dioxygenase (TauD) journal October 2003
A Synthetic High-Spin Oxoiron(IV) Complex: Generation, Spectroscopic Characterization, and Reactivity journal May 2009
Low-coverage adsorption properties of the metal–organic framework MIL-47 studied by pulse chromatography and Monte Carlo simulations journal January 2009
Microporous Metal-Organic Frameworks with High Gas Sorption and Separation Capacity journal April 2007
Henry's constants, isotherms and heats of adsorption of some hydrocarbons in zeolites of faujasite type with different content of sodium cations journal October 1984
Adsorption of volatile organic compounds onto carbon nanotubes, carbon nanofibers, and high-surface-area graphites journal January 2007

Cited By (28)

A Bifunctional MOF Catalyst Containing Metal–Phosphine and Lewis Acidic Active Sites journal September 2018
HCl and O 2 co-activated bis(8-quinolinolato) oxovanadium( iv ) complexes as efficient photoactive species for visible light-driven oxidation of cyclohexane to KA oil journal January 2019
Nature-mimic fabricated polydopamine/MIL-53(Fe): efficient visible-light responsive photocatalysts for the selective oxidation of alcohols journal January 2020
Hydrophobic Modification of Microenvironment of Highly Dispersed Co 3 O 4 Nanoparticles for the Catalytic Selective Oxidation of Ethylbenzene journal November 2019
Fast Cyclohexane Oxidation Under Mild Reaction Conditions Through a Controlled Creation of Redox‐Active Fe(II/III) Sites in a Metal−Organic Framework journal October 2019
Redox-active metal–organic frameworks for energy conversion and storage journal January 2019
Boosting selective oxidation of cyclohexane over a metal–organic framework by hydrophobicity engineering of pore walls journal January 2017
Pseudo‐Gated Adsorption with Negligible Volume Change Evoked by Halogen‐Bond Interaction in the Nanospace of MOFs journal January 2020
Organic amines as templates: pore imprints with exactly matching sizes in a series of metal–organic frameworks journal January 2018
Mapping-Out Catalytic Processes in a Metal-Organic Framework with Single-Crystal X-ray Crystallography journal February 2017
Effective and Selective Catalysts for Cinnamaldehyde Hydrogenation: Hydrophobic Hybrids of Metal-Organic Frameworks, Metal Nanoparticles, and Micro- and Mesoporous Polymers journal March 2018
Copper‐doped sulfonic acid‐functionalized MIL‐101(Cr) metal–organic framework for efficient aerobic oxidation reactions journal January 2020
Ethylene oligomerization in metal–organic frameworks bearing nickel( ii ) 2,2′-bipyridine complexes journal January 2017
A new iron-based metal–organic framework with enhancing catalysis activity for benzene hydroxylation journal January 2019
The synthesis and applications of chiral pyrrolidine functionalized metal–organic frameworks and covalent-organic frameworks journal January 2020
Metal‐Organic Frameworks as Platform for Lewis‐Acid‐Catalyzed Organic Transformations journal July 2019
In Operando Analysis of Diffusion in Porous Metal‐Organic Framework Catalysts journal December 2018
Sustainability in Catalytic Cyclohexane Oxidation: The Contribution of Porous Support Materials journal December 2019
Recent Advances in Iron Catalyzed Oxidation Reactions of Organic Compounds journal August 2017
Effective and Selective Catalysts for Cinnamaldehyde Hydrogenation: Hydrophobic Hybrids of Metal-Organic Frameworks, Metal Nanoparticles, and Micro- and Mesoporous Polymers journal March 2018
Encapsulation of Crabtree's Catalyst in Sulfonated MIL-101(Cr): Enhancement of Stability and Selectivity between Competing Reaction Pathways by the MOF Chemical Microenvironment journal March 2018
A series of new mixed-ligand complexes based on 3,6-bis(imidazol-1-yl)pyridazine: syntheses, structures, and catalytic activities journal January 2017
Fine tuning of catalytic and sorption properties of metal–organic frameworks via in situ ligand exchange journal January 2017
A complex metal-organic framework catalyst for microwave-assisted radical polymerization journal October 2018
Enhancing catalytic alkane hydroxylation by tuning the outer coordination sphere in a heme-containing metal–organic framework journal January 2020
Hydrophobic Metal–Organic Frameworks journal June 2019
Encapsulation of Crabtree's Catalyst in Sulfonated MIL-101(Cr): Enhancement of Stability and Selectivity between Competing Reaction Pathways by the MOF Chemical Microenvironment journal March 2018
Mapping-Out Catalytic Processes in a Metal-Organic Framework with Single-Crystal X-ray Crystallography journal February 2017

Figures / Tables (10)