A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, COA of Formula: C5H5NO2, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 13161-30-3, Name is 2-Pyridinol-1-oxide, molecular formula is C5H5NO2. In an article, author is Mravec, Bernard,once mentioned of 13161-30-3.
Structural and Spectroscopic Properties of Benzoylpyridine-Based Hydrazones
Photochromic hydrazones are attracting the attention in the field of photochromic systems especially due to their P-type character. To understand the structural features and their correlation with the spectroscopic data, UV-Vis, vibrational and ellipsometry spectroscopic techniques are employed with the support of density functional theory (DFT) calculations to three hydrazone derivatives based on benzoylpyridine. Interestingly, analysis of the structure shows the presence of two distinct rotamers around the pyridine ring with different energy and the well-defined conjugation path that changes due to E to Z isomerization especially in the hydrazone -C=N-NH part of the skeleton. IR and Raman spectra are analyzed, showing a higher selectivity in the Z form; moreover, the comparison with the normal modes proves the effect of the reaction on the backbone structure. The experimental results are in good agreement with the theoretical predictions, especially in the case of the Raman spectrum. The molecular polarization also changes from E to Z forms as predicted by DFT calculations. Spectroscopic ellipsometry on thin films of TOPAS doped with 10 %wt of the dimethylamino hydrazone derivative is used to prove such change at the molecular level. A modulation of the refractive index is observed, and it is correlated with the concentration of the active moiety and the calculated electronic polarizabilities.
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Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem