Preparation in aqueous medium of all the lanthanoid (except Ce and Pm) and yttrium tellurates is described. Chemical analyses, solubilities at 25°C in water and thermograms of all the products prepared were determined. X-ray diffractograms and DTA and DTG curves of La, Gd and Yb tellurates were...

Two new alkali tellurates Cs2SO4·Te(OH)6 (CsSTe) and Cs2SeO4·Te(OH)6 (CsSeTe), are obtained by action of telluric acid H6TeO6 with respectively, caesium sulfate Cs2SO4 and caesium carbonate Cs2CO3 and selenic acid H2SeO4. CsSTe is rhombohedric, R3, with a=b=7.4790(3) Å, c=16.6370(6) Å, Z=3, V=...

The review describes the coordination chemistry of periodate [IO6H5−n]n− and tellurate [TeO6H6−n]n− ligands with both main group and transition metal centres. Relevant chemistry of periodic and telluric acids and their salts are reviewed, followed by discussion of the application of structural (...

Bis(benzyltriphenylphosphonium)[bis(1,2-dithiosquarato)tellurate(II)], (BzlPh3P)2[Te(dtsq)2], can be obtained by the reaction of potassium 1,2-dithiosquarate (K2dtsq) with sodium telluropentathionate, Na2Te(S2O3)2, under an argon atmosphere in deoxygenized water/methanol and precipitation by lar...

The emission of carbon dioxide into the atmosphere is recognized as a significant driver for climate change. Carbon capture and storage (CCS) techniques are efficient and effective ways to reduce these emissions to the atmosphere. However, the cost of any carbon capture technique has to be reduc...

The solubility isotherm of the system ZnSO4—K2H4TeO6—H2O was studied and the conditions of synthesis of zinc tellurates were determined. The thermal and thermodynamic properties of the compounds obtained were determined.

At room temperature the potassium selenate tellurate K2SeO4·Te(OH)6 (KSeTe) was prepared from water solution of H6TeO6 and K2SeO4. Its structure has been determined from single crystal using neutron diffraction data. KSeTe is monoclinic with C2/c space group. The unit cell parameters are: a = 1...

Glasses of the ternary system 2TeO2xK2O(1−x)V2O5 have been prepared for x=0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 mol%. For each composition only one glass transition Tg is observed in the temperature range 497–517 K. For each composition, the conductivity data were obtained in the temperature range 32...

ObjectiveTo assess the relationship between in utero and concurrent child urinary exposures to bisphenol A (BPA) and phthalates with BMI z-score, waist circumference, and sum of triceps and subscapular skinfold thickness in Mexican children.

Although 3-alkyl-2-methoxypyrazines (MPs) are very important flavor compounds in grape and wine, the metabolic pathway of these compounds has not been fully elucidated, and only a few studies have focused on it to date. In this study, we performed in situ incorporation of the proposed precursor ...

Hydrothiolation of symmetrical and unsymmetrical buta-1,3-diynes with sodium organylthiolate anions in reflux, generated in situ by reacting C4H9SH with NaOH, afforded (Z)-organylthioenynes in low to good yields (25–80%). By using tetrabutylammonium hydroxide (TBAOH) as base instead of NaOH, th...

A new sildenafil analogue, propoxyphenyl isobutyl aildenafil has been found in trace quantity from one health supplement. It has been purified by preparative high performance liquid chromatography (HPLC). The structural elucidation of this compound has been carried out using high-resolution Orbi...

We have developed a new hybrid material, featuring single-site phenolic functions on a silica surface. This new material was used for the grafting, by surface organometallic chemistry, of tungsten perhydrocarbyl and molybdenum bispyrrolide alkylidene complexes. Dramatic improvements in terms of ...

The present work deals with the development and validation of a selective and highly sensitive spectrofluorimetric method for determination of 3-isobutyl gamma amino butyric acid (3-isobutyl GABA). The drug is selectively condensed with o-phthalaldehyde in presence of 2-mercaptoethanol to form a...

Ferroelectric BaTiO3 thin films were coated on titanium implants using an electrostatic spraying deposition method to combine the biocompatibility of a ceramic with the high mechanical strength of a metal. As-deposited films were annealed at 850 °C for 30 min in argon. Crystallinity, chemical s...

This work reports the Calcium-Looping (CaL) multicycle performance under energy storage and CO2 capture conditions of different Al-composites prepared by milling mixtures of nanoalumina and natural limestone powders. The micro- and nanostructure of the composites have been analyzed by X-ray diff...

CaTiO3 particles with different particle sizes and morphologies were synthesized starting from CaCl2 and titanium (IV) isopropoxide with or without the use of organic modifier by the hydrothermal synthesis method. Without the use of organic modifier, nanosized CaTiO3 particulates were mainly for...

Mono(ketiminate) aluminum dimethyl complexes 1a–5a and bis(ketiminate) aluminum methyl complex 2b were synthesized via the reactions of AlMe3 with various N-aryl substituted ketimine compounds in a 1:1 or 1:2 molar ratio, respectively. The reaction of Al(OiPr)3 with the ketimine compound L2H re...

Calcium-fuctionalized mesoporous γ-alumina was synthesized for alcoholysis of Polycarbonate (PC). Compared with the traditional homogeneous depolymerization process, such alcoholysis process presents a higher capacity, more time effective and environmental benign. Benefited from such mild condi...

Single phase and crystalline calcium titanate exhibiting spherical particle was synthesized by spray pyrolysis method. Nanometric to submicrometric particle size was characterized by X-ray diffraction and scanning electron microscopy. Crystalline structure and its crystallographic parameters wer...