نتایج جستجو برای: cerium iv sulfate
تعداد نتایج: 239874 فیلتر نتایج به سال:
The reaction of a fluorinated iridium complex with cerium(IV) and organic reducing agents generates an intense emission with a significant hypsochromic shift compared to contemporary chemically-initiated luminescence from metal complexes.
Interactions of nanoparticles with biological matter-both somatically and in nature-draw scientists' attention. Nanoparticulate systems are believed to be our saviors, acting as versatile drug delivery vehicles. However, they can also cause life-threatening bodily damage. One of the most important properties of nanocrystalline cerium dioxide is its antioxidant activity, which decreases the abun...
A new organically templated open-framework cerium sulfate, {(C(4)H(16)N(3))[Ce(SO(4))(3)(H(2)O)]}(n), was hydro-thermally synthesized. The Ce(III) cation is nine-coordinated by nine O atoms, including one water mol-ecule. Two of the SO(4) groups afford one monodentate and bidentate linkages as the bridge to connect adjacent Ce(III) cations, while the third SO(4) group attaches the Ce(III) catio...
A Quartz Crystal Microbalance (QCM) Study of Single-Strand DNA Hybridization and Hydrolytic Cleavage
The use of a quartz crystal microbalance (QCM) for monitorin g in situ the immobilization of singlestrand DNA marked with mercaptol group at the 5'-end on the surface of a gold-filled 7.995 MHz AT-cut quartz crystal by Au–S bond with the self-assembly technique is reported. The hybridization of ssDNA with complementary 10-mer ODN and 8-mer ODN is described. The QCM was also employed to analyze ...
For the first time electron spin resonance (ESR) spectroscopic technique has been used for a highly selective determination of chlorpromazine. The method is based on the oxidation reaction of chlorpromazine with cerium(IV) in sulfuric acid media. In this method 3.8x10(-3) mol dm(-3) cerium(IV) was used in 0.035 mol dm(-3) sulfuric acid with the ESR spectra recorded at room temperature. A calibr...
The oxidation of alcohols, n-propanol, 2-methoxy ethanol and 2-ethoxy by cerium (IV) in nitric acid leads to the formation corresponding aldehydes. reaction is first order with respect Ce(IV). A Michaelis-Menten type kinetics observed alcohols. retarded initial [Ce(IV)] increase concentration oxidant. exhibits participation 2 mole 1 It has been concluded that Ce(IV)-dimer participate process fr...
The objective of this study is to develop a simple, environmentally benign alternate analytical method for simultaneous estimation of iron oxidation states. This proposed method of iron speciation is based on 1,10-phenanthroline (phen) modified redox potential of transition metal ions. In a pre-step excess cerium(IV) oxidizes iron(II) in sample to iron(III). Initial back titration of un-reacted...
A series of montmorillonite-(Ce or Zr) phosphate crosslinked compounds has been synthesized by reaction of a cerium or zirconium cation exchanged montmorillonite (diameter ~2 pm) with phosphoric acid under appropriate conditions of concentration, addition rate and temperature. The materials thus obtained were characterized by chemical and thermal analyses, X-ray diffraction, IR spectroscopy and...
The trivalent compound K[Ce[N(SiHMe2)2]4] was synthesized and oxidized, providing a convenient route to the reported cerium(IV) compound Ce[N(SiHMe2)2]4. Protonolysis reactions of Ce[N(SiHMe2)2]4 with tert-butanol, substituted benzyl alcohols, and 2,6-diphenylphenol yielded the neutral tetravalent compounds Ce(O(t)Bu)4(py)2, Ce2(OCH2C6R5)8(thf)2 (R = Me, F), and Ce(Odpp)4 (dpp = 2,6-(C6H5)2-C6H...
Pectin cerium(IV) iodate (PcCeI) and (CeI) cation ion exchange materials were synthesized via sol–gel methods. The characterized by using Fourier transform infrared spectroscopy, X-ray diffractometer, thermogravimetric analysis, scanning electron microscopy. capacity (IEC), thermal stability, distribution coefficient (Kd), pH titrations investigated to recognize the behavior of materials. IEC p...
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