Tamura, Masazumi published the artcileOrganic compound modification of CeO2 and 2-cyanopyridine hybrid catalyst in carbonate synthesis from CO2 and alcohols, Product Details of C6H4N2, the main research area is cerium oxide carbon dioxide surface modification dialkyl carbonate.
The effect of surface modification of CeO2 and 2-cyanopyridine hybrid catalyst with organic compounds was investigated by using dialkyl carbonate synthesis from CO2 and alcs. Phenol is the useful modifier for CeO2 and 2-cyanopyridine hybrid catalyst without drastic decrease of the activity. Based on the characterizations of phenol-modified CeO2 and 2-cyanopyridine hybrid catalyst such as TG-DTA, GC, FTIR and UV-vis, phenol and 2-cyanopyridine were adsorbed on CeO2 at the same time and the adsorption ratio to the surface Ce on CeO2 is estimated to be 0.11 and 0.12, resp. (2-cyanopyridine/Ce on CeO2 surface = 0.12, phenol/Ce on CeO2 surface = 0.11). The reactivity of alcs. was changed by the addition of phenol due to the steric hindrance of phenol adsorbed on CeO2. The effect of the steric hindrance was large at the C2 and C3 positions of alcs., which corresponds to the C2 and C3 positions of phenol. The reactivity was drastically decreased in the cases of C2 position-branched alcs. compared with the case without phenol addition, and the yield ratio (The yield without phenol/the yield with phenol) increased: 61 in the case of 2-ethyl-1-butanol, 9.9 in the case of 2-methyl-1-butanol, and 3.7 in the case of 1-butanol. From the DFT calculations, phenol is adsorbed nearby 2-cyanopyridine adspecies by the p-p interaction between the aromatic rings of these chems. to decrease the reaction space over CeO2, resulting in the reactivity decrease of the steric alcs., particularly the alcs. with substituents at the C2 position. Therefore, phenol can restrict the reaction field of CeO2 and 2-cyanopyridine hybrid catalyst by the steric hindrance, enabling the control of the reactivity of alcs. in the synthesis of dialkyl carbonates from CO2 and alcs.
Journal of CO2 Utilization published new progress about Adsorption. 100-70-9 belongs to class nitriles-buliding-blocks, name is Picolinonitrile, and the molecular formula is C6H4N2, Product Details of C6H4N2.
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts