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In situ Synchrotron IR Microspectroscopy of CO2 Adsorption on Single Crystals of the Functionalized MOF Sc2(BDC-NH2)3
Authors:
Alex
Greenaway
(EaStCHEM School of Chemistry, Purdie Building, St Andrews)
,
Berenice
Gonzalez-santiago
(EaStCHEM School of Chemistry, Purdie Building, St Andrews)
,
Paul
Donaldson
(Diamond Light Source)
,
Mark
Frogley
(Diamond Light Source)
,
Gianfelice
Cinque
(Diamond Light Source)
,
Jorge
Sotelo
(EaStCHEM School of Chemistry, Joseph Black Building, West Mains Road, Edinburgh)
,
Stephen
Moggach
(EaStCHEM School of Chemistry, Joseph Black Building, West Mains Road, Edinburgh)
,
Elenica
Shiko
(School of Engineering, University of Edinburgh)
,
Stefano
Brandani
(School of Engineering, University of Edinburgh)
,
Russell
Howe
(Department of Chemistry, University of Aberdeen)
,
Paul
Wright
(EaStCHEM School of Chemistry, Purdie Building, St Andrews)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Angewandte Chemie
, VOL 126
, PAGES 13701 - 13705
State:
Published (Approved)
Published:
December 2014
Diamond Proposal Number(s):
8875
,
10014
,
9027

Abstract: Synchrotron radiation (SR) IR microspectroscopy has enabled determination of the thermodynamics, kinetics, and molecular orientation of CO2 adsorbed in single microcrystals of a functionalized metalorganic framework (MOF) under conditions relevant to carbon capture from flue gases. Single crystals of the small-pore MOF, Sc2(BDC-NH2)3, (BDC-NH2=2-amino-1,4-benzenedicarboxylate), with well-defined crystal form have been investigated during CO2 uptake at partial pressures of 0.025-0.2 bar at 298373 K. The enthalpy and diffusivity of adsorption determined from individual single crystals are consistent with values obtained from measurements on bulk samples. The brilliant SR IR source permits rapid collection of polarized spectra. Strong variations in absorbance of the symmetric stretch of the NH2 groups of the MOF and the asymmetric stretch of the adsorbed CO2 at different orientations of the crystals relative to the polarized IR light show that CO2 molecules align along channels in the MOF.
Journal Keywords: Analytische Methoden; Einkristalle; Ir-Spektroskopie; Kohlendioxid-Adsorption; Metall-Organische Gerüste
Subject Areas:
Chemistry
Instruments:
B22-Multimode InfraRed imaging And Microspectroscopy
,
I11-High Resolution Powder Diffraction
Documents:
Greenaway_et_al-2014-Angewandte_Chemie.pdf
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