Carbon dioxide capture with absorption is the main method to reduce CO2 emission. In this article CO2 solubility data were measured and thermodynamic models are established for CO2 capture with a new solvent 1-methylpiperazine (1-MPZ) with piperazine (PZ). Then the simulations are carried out wi...

Four trans-planaramineplatinum(II) complexes code named YH9, YH10, YH11 and YH12, each of the form trans-PtL(NH3)Cl2 where L = 2-hydroxypyridine and 3-hydroxypyridine, imidazole, and imidazo(1,2-α)pyridine for YH9, YH10, YH11 and YH12, respectively. All of the compounds have significant antican...

The kinetics of the Rose Bengal sensitised photooxidation of six 2-substituted 3-hydroxypyridines and the parent compound 3-hydroxypyridine (3-OHP), all with the basic molecular structure of known pesticides, have been studied in solution in neutral or alkalinised water or acetonitrile-water 4 :...

The flavoenzyme 2-Methyl-3-hydroxypyridine-5-carboxylic acid oxygenase (MHPCO) catalyzes the cleavage of the pyridine ring of 2-methyl-3-hydroxypyridine-5-carboxylic acid (MHPC) in the presence of NADH, molecular oxygen, and water. MHPCO also catalyzes the NADH oxidation reaction uncoupled with ...

The photoreaction mechanism of 3-chloro-2-hydroxypyridine isolated in a low-temperature argon matrix was investigated by IR spectroscopy and density functional theory (DFT) calculations. Two tautomeric forms, keto and enol I, with an intramolecular N⋯H–O hydrogen bond, existed in the matrix bef...

The synthesis and structural characterization of two new complexes catena-[Ni(3-O-py)(3-HO-py)2(μ1,3-N3)(H2O)] (1) and catena-[Zn(μ-3-O-py)(μ1,1-N3)] (2), where 3-HO-py = 3-hydroxypyridine, are reported. The complexes were characterized by the elemental microanalyses, IR, and X-ray crystallog...

In consideration of the nucleophilic capacity of thiophenols, which could cleave sulfonamide bond under neutral conditions, a cyclometalated iridium(III) complex (probe 1) comprised 2,4-dinitrobenzenesulfonamide (DNBS) as the recognition unit was designed and synthesized to high selectivity and ...

A new fluorescent probe was designed and synthesized according to the photo-induced electron transfer theory (PET) and the results of density functional theory calculation. The synthesized probe had a larger Stokes shift (130 nm) and double emission peak in response to highly toxic thiophenols, ...

Thiophenols as high toxic environmental pollutants are poisonous for animals and aquatic organisms. Therefore, it is indispensable to monitor thiophenols in the environment. Herein, a novel near-infrared fluorescent probe was developed for the detection of thiophenols, which was easily prepared ...

Thiophenol is widely known as a highly toxic substance that can cause serious harm to the environment and health. Rapid and non-destructive detection of thiophenol is of great significance for environmental management. In this work, we designed and synthesized a near-infrared (NIR) fluorescent p...

Two efficient chalcone fluorescent probes (probe-KCN1 and probe-KCN2) were developed for the detection of thiophenols. Upon gradual addition of thiophenols to the fluorescent probes, the fluorescence intensity of the emission band at 550 nm is enhanced about 40-fold, with a large Stokes shift (1...

A convenient synthesis of 5-substituted 2-perfluoroalkyl-4H-pyran-4-ones by dehydration of 2,3-dihydro-3-hydroxy-6-perfluoroalkyl-4H-pyran-4-ones is described. The 6-substituted and parent 2-perfluoroalkyl-4H-pyran-4-ones have been more successfully prepared using the condensation of alkyl enol ...

Within our current studies on the natural photodegradation of representative aquatic environmental contaminants, the visible light irradiation of the model compound 4-hydroxypyridine (4-OHP), in air-equilibrated aqueous solution and in the presence of riboflavin (Rf), has been studied employing ...

The rotational spectrum of 4-hydroxypyridine has been investigated by free jet absorption millimeter-wave spectroscopy. Only the enolic form is observed. All transitions are split into two component lines due to the internal rotation of the hydroxyl group. From the ground state splitting (ΔE = ...

Three dimers created from the 2-pyridone/2-hydroxypyridine tautomers and four dimers created by the 4-pyridone/4-hydroxypyridine tautomers were described using ab initio self-consistent-field (SCF) calculation and the energies were corrected for the electron correlation contribution by using the...

A polyoxadiazole containing the 4-hydroxypyridine group, introduced to enhance the intermolecular interaction between polymer chains as well as for photosensitization, was synthesized from a corresponding precursor polyhydrazide. The absorption and emission spectra of the polymer film exhibited ...

A series of Fe(CN)5L3 complexes, where L = 4-, 3-hydroxypyridines and 4-, 3-methoxypyridines, was prepared in aqueous solution by the reaction of Fe(CN)5OH24 with excess ligand. A metal-to-ligand charge-transfer transition was observed for the complexes at 414 (4-hydroxypyridine), 363 (3-hydroxy...

The highly directional interactions among complex gelators of 2,6-pyridinedicarboxylic acid and 4-hydroxypyridine are investigated, which lead to the formation of ordered one-dimensional fibers with diameters of 500 nm ~ 2 μm. By scanning electron microscopy (SEM), Fourier transform infrared (F...

Three planaraminepalladium(II) complexes of the form: trans-PdCl2L2, code named TH5, TH6 and TH7 where L = 3-hydroxypyridine, 2-hydroxypyridine and 4-hydroxypyridine respectively have been investigated for antitumour activity against ovarian cancer cell lines: A2780, A2780cisR and A2780ZD0473R. ...

In this work, mechanisms of both the singlet and triplet state riboflavin (RF) quenching by 3-hydroxypyridine (3-HP) and 4-hydroxypyridine (4-HP) have been investigated by employing quantum chemical calculations. It was revealed that both the direct electron transfer and H-atom transfer pathways...