Berlin 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MO: Fachverband Molekülphysik
MO 15: Experimental Techniques 3
MO 15.5: Vortrag
Donnerstag, 20. März 2014, 11:30–11:45, BEBEL SR144
Characterization of metal carbonyls and their release of carbon monoxide using IR absorption spectroscopy — •Moritz Klein1, Ute Neugebauer1,2, Ali Gheisari1, Michael Schmitt3, and Jürgen Popp1,2,3 — 1Leibniz Institute of Photonic Technology, Jena, Germany — 2Center for Sepsis Control and Care, Jena University Hospital, Germany — 3Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University of Jena, Germany
Carbon monoxide (CO) is a poisonous gas, but nevertheless, application of low doses of CO in medical treatment has been proven several beneficial effects on health. Novel compounds, mainly metal carbonyl complexes, have been synthesized that liberate CO in a controlled manner. However, their exact mechanism and kinetic of CO release is mostly not known. In this contribution, we applied different techniques of infrared (IR) absorption spectroscopy to study the decay of these metal carbonyls: IR gas phase spectroscopy is used to detect liberated CO in the supernatant gas phase above these compounds and attenuated total reflection (ATR) IR spectroscopy of solutions is applied to directly observe the decay of the carbonyl groups of the solved educt. Molecules with different CO releasing mechanisms were investigated. Following their CO release in a time-resolved manner and analysis of their end products supported by DFT calculations yielded important insights into their reaction mechanisms.
Acknowledgement: Financial support by DFG (FOR 1738) and BMBF (CSCC) is highly acknowledged as well as the group of M. Westerhausen for metal carbonyl syntheses.