o-Trifluoromethylphenylmercuric chloride and o-fluorophenylmercuric chloride have been synthesized from o-trifluoromethylnitrobenzene and o-chloronitrobenzene, respectively. / o-Trifluoromethylphenylmercuric chloride and o-fluorophenylmercuric chloride have been synthesized from o-trifluoromethylnitrobenzene and o-chloronitrobenzene, respectively.
The location of Eu3+ in alpha-cordierite, synthesized by a sol-gel route, was investigated by using both site-selective spectroscopy and time-resolved spectroscopy. F-7(0) --> D-5(1,2) excitation and D-5(0) --> F-7(0,1,2) emission spectra were performed at 77 K. The Eu3+ ions are distributed in two families : the A family in the structure channels ...
Three kinds of novel luminescent complexes of Eu(III) with mixed ligands of beta-diketone and diaza-18-crown-6 ([2,2]) were synthesized: H-2[Eu(TTA)(4)](2).[2,2] (A), [Eu(TTA)(3)](2).[2,2] (B) and [Eu(DBM)(3)](2).[2,2] (C) (HTTA = thenoyltrifluoroacetone, HDBM = dibenzoylmethane and [2,2] = diaza-18-crown-6). Their observed fluorescence intensities...
Steric effect of organophosphorus acid extractants (OPA) with the structure of R(R')P(O)OH plays an important role in the selectivity for different metals. Until now, there is no widely accepted structure parameter for description of the effect. It is suggested in the present paper to take the angle between the two substituting groups and the phosp...
In this paper, the nanosized Cr2O3 were prepared by Sol-Gel method coupling with azeotropic distillation method. The obtained nano-powders were characterized by BET, XRD, TEM, Fr-IR, XPS and H-2-TPR techniques. Fr-IR patterns revealed that the infrared absorption peaks of Cr-O bond in Cr2O3 nano-powders blue shift and the intensity of the absorptio...
A novel hybrid open-framework manganese phosphate-oxalate templated with an organic amine, [CH3NH2CH3][Mn-2(OH2)(HPO4)(C2O4)(1.5)], has been hydrothermally synthesized and structurally characterized. The light pink compound crystallizes in a triclinic system of space group P (1) over bar (No. 2), with lattice parameters a = 8.3014(1) Angstrom, b = ...
A novel polymeric complex, [Mn(phen)(pdc)](infinity) ( phen 1,10- phenanthroline, H(2)pdc 2,5-pyridinedicarboxylic acid) has been synthesized from the hydrothermal reaction system of H2pdc, phen, MnO2, and H2O. [Mn(phen)(pdc)](infinity) is characteristic of an edge-sharing dinuclear Mn-II structure unit bridged by pdc, leading to a 2-D framework wh...
The effect of steam, NaCl. or KCl on potassium pentaborate was investigated at high temperature. The structure changes of KB5O8 in high temperature water steam were studied by a self-designed reactor, XRD, and Raman spectroscopy. The reaction between KB5O8 and water steam at solid state and molten state was confirmed. Ratio of B2O3 to K2O in reacti...
Coprecipitation with carbonates is an effective method for synthesis of the doped ceria nanopowder. This study compared the compositions and properties of the Gd2O3-doped CeO2 (GDC) nanopowders resulted by two ammonium carbonates, including a carbonate mixture from China and a pure carbonate reagent from abroad. It was found that the precursors fro...
The thin films of TiO2 doped manipulatively by Ni were prepared by a section-controlled process of sol-gel method. The activity of thin films was characterized by photocatalytic degradation of aqueous methyl orange under UV irradiation. The results showed that the photocatalytic activity of TiO2 thin film remarkably enhanced by non-uniformly doping...
