This study aims to propose a simple procedure for the development of enantioselective hydrosilylation of a ketone using catalytic amounts of [Ir(cod)2]BF4 and chiral azolium salt. Previously, catalytic asymmetric hydrosilylation reactions have used well-defined metal-N-heterocyclic carbene (NHC)...

This article describes the use of a cationized starch-based material as new ion-exchanger adsorbent for the removal of C.I. Acid Blue 25 (AB 25) from aqueous solutions. Batch adsorption studies concerning the effects of contact time, pH and temperature are presented and discussed. Adsorption exp...

In this work, the sonolytic degradation of an anthraquinonic dye, C.I. Acid Blue 25 (AB25), in aqueous phase using high frequency ultrasound waves (1700 kHz) for an acoustic power of 14 W was investigated. The sonochemical efficiency of the reactor was evaluated by potassium iodide dosimeter, Fr...

The photocatalytic degradation of the anthraquinonic dye, Acid Blue 25 was investigated in aqueous solutions containing TiO2 suspension as photocatalyst. The influence of parameters such as adsorption of the dye onto TiO2, pH, temperature, catalyst concentration and photon flux were studied. Res...

Box-Behnken design, which is well suited for fitting a quadratic surface and usually works well for the process optimization, was employed to optimize the removal of Acid Blue 25 (AB25) using untreated, methanol and HCl pretreated red alga, Jania adhaerens. Biomass was pretreated using hydrochlo...

In this work, the influence of CCl4 on the sonochemical decolorization of anthraquinonic dye Acid Blue 25 (AB25) in aqueous medium was investigated using high frequency ultrasound (1700 kHz). This frequency, reputed ineffective, was tested in order to introduce the ultrasound waves with high fre...

In this work, the decolorization of C.I. Acid Blue 25 (AB25), a commercially important anthraquinonic dye, by direct UV irradiation alone and UV/H2O2 and UV/Fe(II) processes was investigated. Experiments were conducted in batch mode using a low-pressure mercury lamp emitting mainly at 253.7 nm. ...

The objective of this work was to optimize different experimental conditions (dye concentration: 90–130 mg/L, salinity: 10–30 g/L, biomass amount: 0.2–0.4 g/L and reaction time: 25–65 min) for the removal of Acid Blue 25 (AB25) dye using Penaeus indicus shell biomass. The experiments were an...

The spherical or plate-shaped polypyrrole (PPy) nanomaterials were prepared via the chemical oxidative polymerization of pyrrole in the presence of Acid Blue BRL (2-anthracenesulfonic acid, 4-[[4-(acetylmethylamino)phenyl]amino]-1-amino-9, 10-dihydro-9, 10-dioxo, monosodium salt) as both dopant ...

The tripeptide derivative Z(L)Ala(L/D)Phe(L)ValOMe was obtained in 40% yield by reacting (CH3S)2CN(L)CH[CH(CH3)2]COOCH3 with the dipeptide derivative Z(L)Ala(L)PheOH and ZnCl2 at 110°C. The product obtained by bulk condensation contained 9 %, the product obtain...

Synthesis of three acyclic chiral phosphites is reported, in the form of dithymidine phosphite triesters. These diastereomerically pure P-stereogenic phosphites undergo epimerization at a measurable rate at 150 °C. When the alcohols on the deoxyribose moieties are protected as acyls, decomposit...

We herein report on the different coordination behavior of phosphite–olefin ligands containing either a terminal olefin moiety or a related compound containing an internal olefin moiety to a CpCo(I)-center. While the former coordinates to the metal center via P atom and olefin moiety upon irrad...

Three open-framework iron phosphites: Feп5(NH4)2(HPO3)6 (1), Feп2Fe♯(NH4)(HPO3)4 (2) and Fe♯2(HPO3)3 (3) have been synthesized under ionothermal conditions. How the different synthesis parameters, such as the gel concentrations, synthetic times, reaction temperatures and solvents affect the pr...

In the present study, the effect of potassium phosphite on Pseudoperonospora cubensis-inoculated cucumber plants was investigated. Different defense-related enzymes including laccase, polyphenoloxidase and glucanase as well as total protein and lignin contents were analyzed. Anatomical alteratio...

Phosphite antioxidants are extensively used in polyester industry due to extraordinary antioxidative and chromaticity protection capabilities. Unfortunately, they are highly susceptible to hydrolysis leading to reduced antioxidative activity, which remains unsatisfactorily addressed so far. In t...

The phototransformation of phosphite (HPO32−, H2PO3−, +3) from Lake Taihu water (THW) under natural sunlight was evaluated. No direct phosphite photoreaction was observed under sunlight. Suspended solids were shown to play important roles in the indirect photoreaction of phosphite in lake water....

In South Africa, phosphonate trunk injections are widely used in a preventative management strategy against avocado root rot caused by Phytophthora cinnamomi. Due to increasing costs, alternative application methods must be investigated. The efficacy of different phosphonate foliar spray treatme...

In this work, to help the development and design of separation and purification processes for tris-(2,4-ditert-butylphenyl)-phosphite which is an antioxidant of plastic processing, its solution thermodynamics was investigated. Using a static gravimetric method, solubilities of tris-(2,4-ditert-b...

High surface area pure mesoporous aluminum-phosphorus oxide-based derivatives have been synthesized through an S+I− surfactant-assisted cooperative mechanism by means of a one-pot preparative procedure from aqueous solution and starting from aluminum atrane complexes and phosphoric and/or phosph...

Fluosilicic acid (FSA) is a potential source of fluorine raw material instead of using fluorspar (fluorite ore) for the production of anhydrous hydrofluoric acid (AHF) and its further downstream products e.g. production of high quality and high density aluminium fluoride (see below typical flow ...