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

DOI: 10.1002/anie.201408369 DOI Help
PMID: 25382542 PMID Help

Authors: Alex Greenaway (University of St Andrews) , Berenice Gonzalez-Santiago (University of St Andrews) , Paul M. Donaldson (Diamond Light Source) , Mark D. Frogley (Diamond Light Source) , Gianfelice Cinque (Diamond Light Source) , Jorge Sotelo (University of Edinburgh) , Stephen Moggach (University of Edinburgh) , Elenica Shiko (University of Edinburgh) , Stefano Brandani (University of Edinburgh) , Russell F. Howe (University of Aberdeen) , Paul A. Wright (University of St Andrews)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Angewandte Chemie International Edition , VOL 53 (49) , PAGES 13483 - 13487

State: Published (Approved)
Published: December 2014
Diamond Proposal Number(s): 9027 , 8875 , 10014

Open Access Open Access

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, Sc-2(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.

Journal Keywords: Analytical Methods; Carbon Dioxide Adsorption; Ir Spectroscopy; Metal–Organic Frameworks; Single Crystals

Diamond Keywords: Carbon Capture and Storage (CCS); Gas Separation

Subject Areas: Chemistry, Materials, Environment


Instruments: B22-Multimode InfraRed imaging And Microspectroscopy , I11-High Resolution Powder Diffraction

Added On: 09/02/2016 16:40

Documents:
Angew Chem Int Ed - 2014 - Greenaway - In situ Synchrotron IR Microspectroscopy of CO2 Adsorption on Single Crystals of the.pdf

Discipline Tags:

Earth Sciences & Environment Climate Change Chemistry Materials Science Metal-Organic Frameworks Metallurgy Organometallic Chemistry

Technical Tags:

Diffraction Spectroscopy X-ray Powder Diffraction Infrared Spectroscopy Synchtron-based Fourier Transform Infrared Spectroscopy (SR-FTIR)