Wang, Qiang et al. published their research in Chemical Engineering Research and Design in 2022 | CAS: 626-64-2

Pyridin-4-ol (cas: 626-64-2) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·molâˆ? in pyridine vs. 150 kJ·molâˆ? in benzene). Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Category: pyridine-derivatives

Efficient absorption of low partial pressure SO2 by deep eutectic solvents based on pyridine derivatives was written by Wang, Qiang;Wu, Hongwei;Zhang, Tao;Fan, Yunchang;Zhang, Wencheng;He, Kang. And the article was included in Chemical Engineering Research and Design in 2022.Category: pyridine-derivatives This article mentions the following:

Efficient and reversible absorption of SO2 by deep eutectic solvents (DESs) has drawn much attention in recent years. In this work, a new type of deep eutectic solvents (DESs) were synthesized via pyridine derivatives, nicotinamide, aminopyridines and hydroxypyridines, as the hydrogen bond donors (HBDs) with common quaternary ammonium salt ionic liquids (ILs) as hydrogen bond acceptors (HBAs). The studied DESs exhibited an attractive absorption behavior for SO2, especially for low concentration SO2. The 1-allyl-3-methylimidazolium chloride (AmimCl)/2-aminopyridine (2-NH2Py) (2:1) and 1-butyl-3-methylimidazolium chloride (BmimCl)/3-aminopyridine (3-NH2Py) (2:1) could capture 0.273 and 0.223 g SO2/g DES at 293 K and 1.0 kPa, resp., surpassing that of most DESs and ILs in the present literature. The influence of DES composition, temperature and pressure on SO2 absorption performance was systematically investigated. Moreover, the absorption mechanism studied by NMR (NMR) and Fourier transform IR (FT-IR) spectroscopies indicated that the efficient absorption of SO2 was ascribed to the chem. interaction between the pyridine nitrogen atom and SO2. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Category: pyridine-derivatives).

Pyridin-4-ol (cas: 626-64-2) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·molâˆ? in pyridine vs. 150 kJ·molâˆ? in benzene). Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem