Chloroethenes like tetrachloroethene (PCE) are the most prevalent groundwater contaminants in the USA. Their presence as nonaqueous phase liquids (NAPLs) makes remediation difficult. Among options for NAPL cleanup, co-solvent injection has demonstrated success. However, the process has the potential to leave considerable residue of the co-solvent as well as residual chloroethene. Our rationale ...

We have synthesized a pillar[6]arene in high yield and a co-pillar[6]arene using chlorocyclohexane as a solvent.

X-ray absorption spectroscopy (XAS) was used to characterize the structure of photoactive Co(II) azobenzene complex. Optical spectra show that photoinduced changes occur only in dimethylformamide (DMF) solvent, while acetonitrile, this complex is photochemically inactive. Co K-edge XAS indicate 6-coordinated species acetonitrile with a similar one crystalline form However, DMF, an activation pr...

Coordination polymers derived from 5-benzyloxy isophthalic acid (H2BzOip) are rare, with only three reported that do not contain additional bridging ligands, of which two M2(BzOip)2(H2O) (M = Co and Zn) are isomorphous. It was hoped that by varying the solvent system in a reaction between H2BzOip and M(OAc)2 (M = Co and Zn), from water to a water/alcohol mixture, coordination polymers of differ...

The title complex, {[Co(2)(C(9)H(4)N(2)O(4))(2)(H(2)O)(4)]·3H(2)O}(n), was synthesized hydro-thermally. The unique Co(II) ion is coordin-ated in a distorted octa-hedral coordination environment by two water mol-ecules and three symmetry-related 1H-benzimid-azole-5,6-dicarboxyl-ate (Hbidc) ligands. The Hbidc ligands coordinate via a bis-chelating and mono-chelating carboxyl-ate group and by an i...

We present an improved method for ultraviolet spectrophotometry of theophylline in serum. We studied various extraction techniques aimed at eliminating interferences from co-extractable serum constituents. In the resulting modified procedure, 1 ml of serum is required and a salt-solvent pair of ammonium sulfate and chloroform/hexane is used for extraction. The solvent forms the top phase after ...

A rapid and sensitive method has been developed for the determination of benzaldehyde, a toxic oxidation product of the widely used preservative and co-solvent benzyl alcohol in injectable formulations of non-steroidal anti-inflammatory drugs, diclofenac, vitamin B-complex and Voltaren injection solutions by using dispersive liquid-liquid microextraction followed by gas chromatography. This met...

cuo-ceo2 nanocomposite is reported as a green and highly efficient recyclable catalyst for the multicomponent  synthesis of 3,4-dihydropyrimidin-2(1h)-ones/thiones under solvent-free conditions. the catalyst was synthesized by co-precipitation method and characterized by xrd, bet specific surface area, fesem and eds analysis.

Significantly increased aCtlVlfY of Cr(CO)6 was achieved for the stereoselective homogeneous hydrogenation of methyl sorbate and tmns,trans-conjugated fatty esters at ambient temperature and pressure by exposing the catalyst to UV irradiation (3500.'1.) in a solvent mixture of cyclohexane-acetonitrile (20:1). In this solvent mixture, methyl sorb ate was converted quantitatively at ambient condi...

Abstract In this work, the performance of carotenoids extraction from Rhodotorula spp red yeast (strain ELP2022) using supercritical CO 2 (CO -SFE) was compared to traditional technique with organic solvent. For purpose, cultured in liquid medium, pre-treated glass beads 0.1 M NaHCO 3 , and lyophilized. The by -SFE carried out a bench scale equipment at 300, 400, 500 bar whilst maintaining cons...