The photophysical properties of fluorinated 7-aminocoumarin derivatives with different alkylation degree at the amino group are studied in water/ethanol mixtures. The effect of the molecular structure of the chromophore and solute-protic solvent interactions are considered to explain the observe...

Among several newly synthesized coumarins are 7-pyrrolyl coumarins and carbazole-coumarin hybrids (2-pyranone-condensed carbazoles). Their spectral properties and crystal structures are discussed by comparing with those of related 7-aminocoumarin derivatives. Carbazole-coumarin hybrids exhibit a...

Infrared absorption and Raman spectra (3500–50 cm−1) of 3-acetyl-6-bromocoumarin and 3-acetyl-6-methylcoumarin have been measured and interpreted, aided by electronic structure calculations at RHF and B3LYP using 6-31(d, p) basis set. It has been determined that the rotation of the acetyl group...

The p-bromophenyl β-glycosides of cellobiose, lactose, and maltose have been prepared via their hepta-O-acetyl derivatives, by an adaptation of Griebel and Helferich's method1 for the preparation of phenyl β-lactoside. In preliminary experiments, it was found that this version of the Koen...

4-(p-Bromophenyl)-bicyclo (2,2,2)octan-1-amine was a potent antagonist of p-chloroamphe-tamine-induced depletion of brain serotonin and a weaker antagonist of 6-hydroxydopamine-induced depletion of heart norepinephrine in rats and in mice. In both species, this compound was more active in antago...

Infrared (4000-250 cm−1) spectra of 1,2-di-(p-bromophenyl)ethane (DPBPE) in crystalline phase, liquid and solutions have been investigated. Molecular mechanics study was performed in order to reveal stable conformations of DPBPE. Six unequivalent minima on the potential energy surface were found...

A new Schiff base metal complex bis[(p-bromophenyl-salicylaldiminato)chloro]iron(III) [Cl(C13H9NOBr)2Fe] and its ligand (N-(4-bromo)-salicylaldimine) have been synthesized. The title complex and its ligand have been characterized by elemental analysis, IR technique, and UV–Vis spectroscopy. It ...

2-{4-[(7-Chloro-2-quinoxalinyl)oxy]phenoxy}propionic acid (X469) and 2-{4-[(7-bromo-2-quinolinyl)oxy]phenoxy}propionic Acid (SH80) are among the most highly and broadly active antitumor agents to have been developed in our laboratories. However, the mechanism(s) of action of these agents remain ...

Xanthene-propargyl derivative was synthesized by multicomponent reaction and was characterized by SCXRD analysis. Structure was optimized to ground state using DFT calculations at the B3LYP/6-311++G(d, p) level of theory in gas phase and in solvent. NBO analysis was performed at same level of th...

The crystal structures of acetato-[meso-tetra(p-chlorophenyl)porphyrinato]thallium(III) Tl[(p-Cl)4tpp](OAc) (1), acetato-[meso-tetra(p-chlorophenyl)porphyrinato]indium(III) In[(p-Cl)4tpp](OAc) (2) and acetato-[meso-tetra(p-bromophenyl)porphyrinato]indium(III) In[(p-Br)4tpp](OAc) (3) were determi...

Tris(p-bromophenyl)aminium hexachloroantimonate and perchlorate were utilized to promote the oxidative ring-opening reaction of cyclopropyl silyl ethers giving ring-expanded ketones. Exploration of salt quantity effect on the reaction allowed us to hypothesize that amine radical cation is regene...

The binding of 3-(p-bromophenyl)-5-methyl-thiohydantoin (BPMT) with human serum albumin (HSA) was investigated by fluorescence spectroscopy in combination with UV absorption spectrum under physiological conditions. The intrinsic fluorescence of HSA was quenched by BPMT through static quenching m...

We described an efficient synthesis of (8β,9β,14β)-17β-acetyl-13β-p-bromophenyl-11,11-di(methoxycarbonyl)-3-methoxygona-1,3,5(10)-triene, (8β,9α,14β)-17β-acetyl-13β-p-bromophenyl-11,11-di(methoxycarbonyl)-3-methoxygona-1,3,5(10)-triene, (8β,9β,14β)-13 β-p-bromophenyl-11,11-di(metho...

5-amino-1-(phenyl/p-halophenyl)imidazole-4-carboxamides (N-phenyl AICA) (2a-e) and 5-amino-1-(phenyl/p-halophenyl)imidazole-4-carbonitriles (N-phenyl AICN) (3a-e) had been synthesized. X-ray crystallographic studies of 2a-e and 3a-e had been performed to identify any distinct change in stacking ...

β-Ethoxyacrolein (BEA), a side product that forms during the preparation of malondialdehyde (MDA) by acidic hydrolysis of tetraethoxypropane (TEP), has been found to be an inhibitor of milk xanthine oxidase (XO) several times more potent than pure MDA (NaMDA). The incubation of XO with 10 μM B...

Traditional quaternary ammonium (QA)-type anion exchange membranes (AEMs) usually exhibit insufficient alkaline stability, which impede their practical application in fuel cells. To address this issue, a facile method for the simple and accessible preparation of QA-type AEMs with improved alkali...

L-theanine has been documented to possess anti-oxidant, anti-inflammatory and neuroprotective potential in various animal models of neurological disorders. The present study was anticipated to investigate the effect of L-theanine against quinolinic acid induced motor deficits, oxido-nitrosative ...

Depression is a common disease that afflicts one in six people at some points in life. Numerous hypotheses have been raised in past years, but the exact mechanism that can be used to explain the development of depression remains obscure. Recently, more and more attentions are being focused on ne...

The first role of these reactions can be emphasized in the biological oxidation of the compounds that appear in water from the rotting process, but it also requires the presence of microorganisms.A second important role of redox reactions for waste water treatment is to convert pollutants into c...

Mangiferin is a phytochemical primarily present in the stem, leaves and bark of Mangifera indica. It offers neuroprotection mainly through inhibition of oxidative stress, and decreasing proinflammatory cytokines level in the brain. Aluminium has been reported to cause oxidative stress-associated...