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In situ synchrotron IR microspectroscopy of CO2 adsorption on single crystals of the functionalised MOF, Sc2(BDC-NH2)3

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Greenaway_2014_ACIE_InSitu_CC.pdf (833.4Kb)
Date
27/11/2014
Author
Greenaway, Alex
Gonzalez Santiago, Berenice
Donaldson, Paul
Frogley, Mark
Cinque, Gianfelice
Sotelo, Jorge
Moggach, Stephen
Shiko, Elenica
Brandani, Stefano
Howe, Russell
Wright, Paul Anthony
Keywords
Analytical methods
Carbon dioxide adsoption
IR spectroscopy
Metal-organic frameworks
Single crystals
QD Chemistry
BDC
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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 metal–organic 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 298–373 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.
Citation
Greenaway , A , Gonzalez Santiago , B , Donaldson , P , Frogley , M , Cinque , G , Sotelo , J , Moggach , S , Shiko , E , Brandani , S , Howe , R & Wright , P A 2014 , ' In situ synchrotron IR microspectroscopy of CO 2 adsorption on single crystals of the functionalised MOF, Sc 2 (BDC-NH 2 ) 3 ' , Angewandte Chemie International Edition , vol. 53 , no. 49 , pp. 13483-13487 . https://doi.org/10.1002/anie.201408369
Publication
Angewandte Chemie International Edition
Status
Peer reviewed
DOI
https://doi.org/10.1002/anie.201408369
ISSN
1433-7851
Type
Journal article
Rights
© 2014 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Description
The authors thank the EPSRC (Grant Number: EP/J02077X/1), CONACYT Mexico, and the University of Edinburgh for funding this research.
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  • University of St Andrews Research
URL
http://onlinelibrary.wiley.com/doi/10.1002/anie.201408369/suppinfo
URI
http://hdl.handle.net/10023/6052

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