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Fourier Transform Infrared Spectroscopy of Metal Organic Framework Compounds

POSTER

Abstract

Metal organic framework compounds (MOFs) have crystalline structures that are highly porous at the molecular level and have large surface areas that are advantageous to catalysis, such as for the decontamination of chemical warfare agents. UiO-66 is a MOF with a zirconium metal center and benzene-1,4-dicarboxylate (BDC) linkers. We have used Fourier Transform Infrared (FTIR) spectroscopy to characterize the vibrational modes of UiO-66 as a function of defect density, where the defects may be missing linkers or missing metal clusters. We have found that as the defect density increases, there is a characteristic broadening in some of the infrared bands. We have also determined from our FTIR spectra that the modulator used to synthesize the UiO-66 is not completely removed after synthesis. This was determined by identifying the presence of Trifluoroacetic Acid (TFA) in a sample that was created using a TFA modulator. We will also report on changes in the spectrum after exposing the UiO-66 samples to formic acid, which can also be used as a modulator.

Authors

  • Addie Wilson

    University of North Carolina at Chapel Hill

  • Brandon Yost

    University of North Carolina at Chapel Hill

  • Peter Schauss

    University of Notre Dame, Los Alamos National Laboratory, North Carolina State University, University of Notre dame, Columbia University, Mississippi State Univ, University of Pennsylvania, Carnegie Mellon University, University of Puerto Rico at Humacao, JLAB, MIT, University of Alabama at Birmingham, Florida State University, NHMFL, University College Dublin, Department of Physics, Florida State University; National High Magnetic Field Laboratory, CNR-Instituto Nanoscienze, Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, Department of Chemistry, Florida State University, University of Alabama at Birmingham, Department of Physics, Birmingham, AL 35294-1170,USA, Department of Chemistry, Virginia Polytechnic Institute and State University, Francis Marion University, University of Richmond, Valdosta State University, University of Pittsburgh, Fermi National Lab, university of minnesota, Univ of Virginia, Joint Quantum Institute, University of Maryland, Georgetown University, IonQ Inc.

  • Laurie McNeil

    University of North Carolina at Chapel Hill