Article (Scientific journals)
Selective Binding of O2 over N2 in a Redox-Active Metal-Organic Framework with Open Iron(II) Coordination Sites
Bloch, Eric; Murray, Leslie; Queen, Wendy et al.
2011In Journal of the American Chemical Society, 133, p. 14814-14822
Peer Reviewed verified by ORBi
 

Files


Full Text
Proof.pdf
Author preprint (3.09 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
neutron diffraction; Mossbauer spectroscopy; x-ray diffraction
Abstract :
[en] The air-free reaction of FeCl2 and H4dobdc (dobdc4- = 2,5-dioxido-1,4- benzenedicarboxylate) in a mixture of DMF and methanol affords Fe2(dobdc), a metal-organic framework isostructural to M2(dobdc) (M = Mg2+, Mn2+, Co2+, Ni2+, Zn2+). The desolvated form of this material has a BET surface area of 1360 m2/g and features 1-D hexagonal pores lined with coordinatively unsaturated Fe2+ cations. O2 adsorption isotherms indicate Fe2(dobdc) irreversibly binds oxygen at 298 K at a capacity over 0.10 mass fraction, corresponding to the adsorption of one O2 molecule per two framework Fe2+ cations. Remarkably, O2 uptake is reversible and the capacity increases two-fold to 0.19 mass fraction at 211 K. Powder neutron diffraction and IR spectroscopy indicate that in both scenarios O2 is coordinated side-on to the iron centers as superoxide at low temperatures and peroxide at room temperature, an observation that is confirmed by Mössbauer spectroscopy. Ideal adsorbed solution theory calculations reveal that Fe2(dobdc) is a promising material for the separation of O2 from air at temperatures well above those currently used in industrial settings.
Disciplines :
Chemistry
Author, co-author :
Bloch, Eric;  Berkeley University of California - UC Berkeley > Chemistry
Murray, Leslie;  Berkeley University of California - UC Berkeley > Chemistry
Queen, Wendy;  NIST
Chavan, S
Maximoff, Sergei;  Berkeley University of California - UC Berkeley > Chemistry
Bigi, J;  Berkeley University of California - UC Berkeley > Chemistry
Krishna, R
Peterson, V
Grandjean, Fernande ;  Université de Liège - ULiège > Département de physique > Département de physique
Long, Gary J;  Missouri University of Science and Technology > Chemistry
Smit, B
Bordiga, S
Brown, C
Long, Jeffrey R.;  Berkeley University of California - UC Berkeley > Chemistry
More authors (4 more) Less
Language :
English
Title :
Selective Binding of O2 over N2 in a Redox-Active Metal-Organic Framework with Open Iron(II) Coordination Sites
Alternative titles :
[en] Liaison préférentielle de O2 sur N2 dans un réseau métal-organique actif en redox avec des sites ouverts de coordination de fer(II).
Publication date :
2011
Journal title :
Journal of the American Chemical Society
ISSN :
0002-7863
eISSN :
1520-5126
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
133
Pages :
14814-14822
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 06 August 2012

Statistics


Number of views
90 (2 by ULiège)
Number of downloads
0 (0 by ULiège)

Scopus citations®
 
434
Scopus citations®
without self-citations
348
OpenCitations
 
412

Bibliography


Similar publications



Contact ORBi