نتایج جستجو برای: salen complexes
تعداد نتایج: 137585 فیلتر نتایج به سال:
A series of layered double hydroxides (LDHs) –hosted sulphonato-salen Cr(III) complexes were prepared and characterized by various physico-chemical measurements, such as Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-Vis), powder X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM) and elemental analysis. Addit...
Zn(salen) complexes have been employed as active catalysts for the formation of cyclic carbonates from epoxides and CO2. A series of kinetic experiments was carried out to obtain information about the mechanism for this process catalyzed by these complexes and in particular about the order-dependence in catalyst. A comparative analysis was done between the binary catalyst system Zn(salphen)/NBu...
background: nonalcoholic steatohepatitis (nash), a progressive stage of nonalcoholic fatty liver disease (nafld), is characterized by steatosis with inflammation. investigations have suggested that oxidative stress may play an important role in the progress of nafld to nash. to provide further insights into beneficial effects of antioxidants in nash prevention, we employed two manganese-superox...
Kinetics and mechanism of vanadium catalysed asymmetric cyanohydrin synthesis in propylene carbonate
Propylene carbonate can be used as a green solvent for the asymmetric synthesis of cyanohydrin trimethylsilyl ethers from aldehydes and trimethylsilyl cyanide catalysed by VO(salen)NCS, though reactions are slower in this solvent than the corresponding reactions carried out in dichloromethane. A mechanistic study has been undertaken, comparing the catalytic activity of VO(salen)NCS in propylene...
Research on controlled drug delivery for cancer chemotherapy has focused mainly on ways to deliver existing anti-cancer drug compounds to specified targets, e.g., by conjugating them with magnetic particles or encapsulating them in micelles. Here, we show that an iron-salen, i.e., μ-oxo N,N'- bis(salicylidene)ethylenediamine iron (Fe(Salen)), but not other metal salen derivatives, intrinsically...
The cytotoxicity of certain Cr(III) complexes, such as [Cr(salen)(H(2)O)(2)](+), [Cr(edta)(H(2)O)](-), [Cr(en)(3)](3+), [Cr(ox)(3)](3-), [Cr(pic)(3)], and CrCl(3), which differ in ionic character and ligand environment in human dermal skin fibroblasts, has been studied. After 72 h of exposure to 100 microM doses of chromium(III) complexes, the order in which the complexes had an inhibitory effe...
In this research, ZeoliteX (Na&6 [(AI02)&6(Si02)u>6].264H20), has been prepared from 2onouz Kaolin. Then VOX·Zeolite has been obtained by treatment of ZeoliteX with vanadyl sulfate solution .The Salen ligand has synthesized by condensation reaction of salisylaldehyde and ethylendiamine. The encapsulated complex, VO (salen), in zeolite pores was prepared by reaction of salen with VOX·Zeolit...
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