33896-74-1Relevant academic research and scientific papers
Comparative FTIR study of the cobalt and iron porphyrin reactions with CO. Does cobalt porphyrin form a bis-carbonyl complex in the Ar matrix?
Martirosyan,Adonts,Hovhannisyan,Kurtikyan
, (2019)
The adducts of Co(II)(TPP) and Fe(II)TPP (TPP is meso-tetraphenyl-porphyrinato dianion) with carbon monoxide in Ar matrix at 10 K have been studied by FTIR spectroscopy using CO, C18O and their equimolar mixture. It is shown that both metals ma
Spectral investigation of the interaction of carbon monoxide and dioxygen with low-temperature sublimates of Co(II) meso-tetraphenylporphyrinate: Evidences for oxidative catalysis
Kurtikyan,Martirosyan,Akopyan
, p. 281 - 288 (2008/10/08)
The interaction of carbon monoxide and dioxygen with low-temperature (T = 77 K) sublimates of cobalt(II) meso-tetraphenylporphyrinate (CoTPP) is studied by IR spectroscopy using isotopically labeled compounds (13CO and 18O2). The obtained data confirm the coordination of CO and O2 with the formation of axial complexes CoTPP · L (L = O2, CO) and the mixed complex O2 · CoTPP · CO. The heating of the complex containing CO and O2 to 150 K leads to the appearance of lines in the IR spectrum corresponding to valence asymmetric (VasOCO) and degenerated deformation (δOCO) vibrations of carbon dioxide. This is evidence for the oxidation of CO. The evacuation of CO2 at a higher, but still low, temperature and the addition of a new portion of CO and O2 mixture lead to the formation of new portions of CO2. This demonstrates the catalytic character of the process. Only low-temperature sublimates have catalytic properties. Sublimates of CoTPP obtained on the surface at room or higher temperature demonstrate neither catalytic activity nor the ability to coordinate any amount of CO and O2 sufficient for the detection by spectroscopy.
