In this study, we used Silica/polyvinyl imidazole core-shell nanoparticles impregnated with sodium dihydrogen phosphate (SiO2/PVI/H2PO4− NPs) for adsorption of samarium and dysprosium ions from aqueous solutions. The effects of the pH, adsorbent dose, contact time, and initial concentration of t...

This paper deals with synthesis and characterization of novel γ-Fe2O3-NH4[email protected]2(APTMS) nanoparticles formed from magnetic γ-Fe2O3 core, stabilized electrostatically in basic media NH4OH, doped with SiO2 shell and functionalized with 3-aminopropyltrimethoxysilane. The gradually synt...

The selective extraction of Dysprosium (Dy) from acidic solutions also containing Neodymium (Nd) was studied using an Emulsion liquid membrane (ELM). Cyanex 572 was successfully applied as carrier. The liquid membrane phase consists of kerosene as diluent, Span 80 as surfactant, Cyanex 572 as ca...

BackgroundOne of the most worrying consequence of the production and use of persistent organohalogen pollutants (POPs) is the high accumulation in Arctic populations because of long-range transport. Study of the effects in these populations may illustrate human impacts that are difficult to asse...

This study investigates the formation of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/F) in oxidation of 4,4′-dichlorobiphenyl (4,4′-DCB) under gas phase conditions over a temperature range of 400–800°C. The experiments involved an isothermal flow reactor equippe...

Based on analyzing intermolecular interaction in building unit of cocrystal of quercetin with 4,4′-bipyridine (QUE·BPY) reported by us on before, a new cocrystal of kaempferol with 4,4′-bipyridine (KAE·BPY) has been designed and synthesized. Within the reported QUE·BPY, 3′OH was neither in...

The search for an effective and sustainable treatment method to remove the recalcitrant atom-bridged bis-anilino compounds, 4,4′-methylenedianiline (MDA) and 4,4′-thiodianiline (TDA) from water is a major challenge and focus of this study. The escalating discharge of these two toxic and carcin...

2,2′,4,4′-Tetrabrominateddiphenyl ether (BDE-47), as one of polybrominated diphenyl ethers (PBDEs), has been proven to be global contaminant owing to widespread utilization as flame retardant. Herein, a novel visible-light-driven (VLD) artificial indirect Z-scheme system of [email protected]3P...

The chemical reactivity of 4,4‘-dichloro-2,2‘-bipyridine (bipy-Cl2) changes profoundly upon coordination to a [Ru]2+ center. When not coordinated to [Ru]2+, bipy-Cl2 is relatively unreactive toward nucleophiles; but when coordinated to [Ru]2+, the chlorine atoms become susceptible to nucleophi...

The reaction of 4,4-dichloro-2,6-di(n-butyl)dithienogermole (DTGCl) with lithium naphthalenide yielded a dark blue solution, which was treated with methyl iodide to provide a 4,4-dimethylated product in 67% isolated yield, indicating the formation of 4,4-dilithio-2,6-di(n-butyl)dithienogermole (...

A Z-scan technique has been used to investigate the nonlinear optical properties of 3,3′-dimethylbiphenyl 4,4′-diamine and 4,4′-diisocyano-3,3′-dimethylbiphenyl. Measurements were performed with a CW diode laser at 635 nm wavelength and 14.5 mW power. The nonlinear optical absorption coeffic...

Photophysical data in cyclohexane solutions, including measurements of energies of lowest excited singlet and triplet states, fluorescence quantum yields, lifetimes, phosphorescence and triplet – singlet difference absorption spectra, reported in a previous Letter as due to methyl 4-halo-5-phen...

Results of the detailed investigations on the bromination of the methyl group of 3-aryl-5-methyl-isoxazole-4-carboxylate, a precursor to obtain 3-aryl-5-formyl-isoxazole-4-carboxylate, are described. The products generated during the study have been utilized as substrates for the synthesis of is...

A very selective method for the formation of γ-lactones from pyranyl ortholactones has been developed which occurs via a fragmentation-acetate migration-ring contraction process. The reaction is very functional group tolerant, providing functionalized γ-lactones as a single isomeric product fo...

Stereochemically-biased bicyclic allylic acetates endo- and exo-1 were shown as being allyl donors for Pd-catalyzed carbonyl allylation using stoichiometric quantities of samarium diodide. Cyclopentenyl acetate and bicyclic derivatives 1 react with cyclic ketones in the presence of SmI2 without ...

One mole of 4-chloro-3,4-dimethyl-2-pentanone was acetylated with two moles labeled acetyl chloride or acetic anhydride of specific activity a in the presence of aluminium chloride or zinc chloride, respectively. The 2,3,4,6-tetramethylpyrylium salt formed in the latter case has a specific activ...

Neocryptotanshinone (NCTS) is a natural product isolated from traditional Chinese herb Salvia miltiorrhiza Bunge. In this study, we investigated its anti-inflammatory effects in lipopolysaccharide (LPS)-stimulated mouse macrophage (RAW264.7) cells. MTT results showed that NCTS partly reversed LP...

A new fluorometric assay is presented for the ultrasensitive quantification of total protein carbonyls, and is based on their specific reaction with rhodamine B hydrazide (RBH), and the production of a protein carbonyl-RBH hydrazone the fluorescence of which (at ex/em 560/585 nm) is greatly enha...

Fluorophotometric determinations of cobalt(II) and hydrogen peroxide were investigated by using the fluorescence reaction between fluorescein-hydrazide (fl-NHNH2), and/or hydrogen peroxide, cobalt(II), respectively. The calibration graphs were liner in the range of 0–6.0 ng cobalt(II) and 0–10...

A new NBD-based chemodosimeter system bearing fluorescein derivative has been synthesized for the detection of Cu(II) ions. The spirocyclic form of molecular system bearing a cleavable active bond performs as a fluorescent probe for Cu2+ ion selectively towards other metal ions. The sensing mech...