![]() TN Olney, NM Cann, G Cooper, CE Brion, Absolute scale determination for photoabsorption spectra and the calculation of molecular properties using dipole sum-rules, Chem. Th Koops, T Visser, WMA Smit "Measurement and Interpretation of the Absolute Infrared Intensities of NH3 and ND3" Journal of Molecular Structure 96 (1983) 203-218 Landolt-Bornstein: Group II: Volume 6 Molecular Constants from Microwave, Molecular Beam, and Electron Spin Resonance Spectroscopy Springer-Verlag. Please address comments about this page to G., Electronic spectra and electronic structure of polyatomic molecules,Van Nostrand,New York, 1966į Shimizu "Stark Spectroscopy of NH3 ν2 Band by 10-μ CO2 and N2O Lasers" J. ![]() NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites.įurther, NIST does not endorse any commercial products that may be mentioned on these sites. There may be other web sites that are more appropriate for your purpose. No inferences should be drawn on account of other sites being referenced, or not, from this page. We have provided these links to other web sites because they may have information that would be of interest to you. Vibration specific dipole moments Vibrational Quantum numbersĬalculated electric quadrupole moments forĮlectric dipole polarizability (Å 3) alphaĬalculated electric dipole polarizability forīy selecting the following links, you may be leaving NIST webspace. ![]() The presence of monomeric Fe species in this Fe/ZSM-5 conveys molecular level insights into the temperature-dependent NH 3-SCR activity and might prove useful in the study of other reactions over monomeric Fe species, such as methane partial oxidation or dehydroaromatization reactions. ![]() Simulation of experimental X-ray absorption data revealed that the Fe species in the sample obtained by this approach adopt a square planar geometry, which changes into fivefold coordination at low temperature by strongly binding either NO or NH 3 as the ligand. ![]() Transient in situ XAS experiments at the Fe K-edge under dynamic NH 3-SCR reaction conditions demonstrated the involvement of all iron atoms in the redox cycle and, with that, suggest that Fe species in the studied Fe/ZSM-5 catalyst are monomers. Herein, we report on a preparation method to synthesize single-site Fe/ZSM-5 by combination of dealumination with the use of a bulky iron complex to introduce Fe. Monomeric Fe species in zeolites are considered to be the active sites for the low temperature activity toward ammonia-assisted selective catalytic reduction of nitrogen oxides (NH 3-SCR) in exhaust gases. ![]()
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