Browsing by Subject "Chemistry (all)"
Now showing items 41-59 of 59
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(1997)The communication describes a process of recovery and enrichment of Cu(ll) from mine waters in a liquid membrane extractor using hollow fibers as solid support. 5Dodecylsalicylaldoxime was used as extracting carrier for ...
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(1996)A study was done of seasonal variations of pesticide contents in waters of the Aconcagua river basin and Aromos dam in the V Region of Chile by solid phase extraction (SPE) and Chromatographic determination with GC-ECD, ...
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(1995)The catalytic activity of Ru3(CO)9 L3 (L = arylphosphine) in the WGSR and in the reduction of nitro derivatives to amines is studied. The same complex is supported in polystyrene‐divinylbenzene copolymer (PSDVB) and the ...
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Separation of Cu(II) and Mo(VI) from mine waters using two microporous membrane extraction systems (Marcel Dekker Inc, 2000)This is a report on the separation and recovery of Cu(II) and Mo(VI) ions from two Chilean mine waters using two hollow fiber-type microporous liquid membrane extraction systems. LIX-860 (a salicylaldoxime) and Alamine 336 ...
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(2006)Silver nanowire arrays with high aspect ratios have been prepared using potentiostatic electrodeposition within the confined nanochannels of a commercial porous anodic aluminium oxide template. The nucleation and growth ...
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(American Chemical Society, 2001)Continuum solvent effect on the electrophilicity index recently proposed by Parr and co-workers (Parr, R. G.; von Szentpaly, L.; Liu, S. J. Am. Chem. Soc. 1999, 121, 1922) is discussed in detail. Solvent effect is introduced ...
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(Royal Society of Chemistry, 2016)The [(phen)((HO)-O-2)Re(CO)(3)](+)(CF3SO3)(-) salt, 1(+)(CF3SO3-), has been crystallized in the form of two new solvates, [(phen)(H2O)Re(CO)(3)](+)(CF3SO3)(-)center dot(C4H8O)(0.5) and [(phen)(H2O)Re(CO)(3)](+)(CF3SO3)(-)center ...
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(American Chemical Society, 2018)In the present work, we report the synthesis and characterization of two new heterometallic coordination polymers based on Ce-III and containing Co-II or Cu-II cations, assembled by the bifunctional ligand 1H-imidazole-4 ...
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(2007)The synthesis and phase characterization of two liquid crystalline methacrylic monomers based on the ω-hexyloxysalicylaldimine group with octyl and decyloxy chain substitutions is presented. The liquid crystalline materials ...
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(Sociedad Chilena de Quimica, 2013)In recent years there has been a great demand for rare earth metals because of their unique physical and chemical properties as new constituents for electronic, optical and magnetic devices. Because of their extremely ...
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(2004)Biomineralization leads to the formation of inorganic crystals with unique, ordered, refined shapes that are regulated by specific macromolecules. This process has been a source of inspiration for exploring novel approaches ...
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(1998)The reaction of copper(I) iodide with tetraethylthiuram monosulfide LEt afforded the novel copper(I) pentanuclear neutral complex [CU5LEt2I5]·EtOH·MeCN 1. Its crystal structure may be described as a very distorted octahedral ...
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(Royal Society of Chemistry, 1998)The UV irradiation of [Re(η5-C5Me5)(CO)3] in the presence of C6F6 effected intermolecular C-F and intramolecular C-H activation generating [Re(η6-C5Me4CH2)(CO) 2(C6F5)] 1a in two isomeric forms. In the major isomer the CH2 ...
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(1983)The photochemistry of several phenyl alkyl and p-anisyl alkyl ketones has been examined using laser flash photolysis and conventional quantum yield techniques. The methoxy-substituted ketones show higher activation energies ...
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(Royal Society of Chemistry, 2015)© The Royal Society of Chemistry 2015.In the present work we demonstrate from kinetic studies that under the experimental conditions proposed for the ORAC protocol, ORAC values do not correlate with the capacity of ...
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(Hindawi Limited, 2017)© 2017 Maximiliano Martínez-Cifuentes et al. The mandatory presence of a chlorine atom on the aromatic ring of 6-hydroxy-3-formyl angular chromones, on the respiration inhibition of mammary carcinoma mouse, is explained ...
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(Royal Society of Chemistry, 2019)New 4-amino-3-iminoquinoline derivative ligands (L1-4) were synthesized through an intramolecular exo-dig cyclization of anionic β-diketiminates, containing an N-benzonitrile moiety. The effect of the alkali-metal in this ...
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(1996)FT-IR and FT-Raman spectra of Caulerpin, a green algae pigment, have been recorded. An assignment of the observed bands is proposed on the basis of previously reported vibrational spectra of similar structures. Intensity ...
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(2000)Electrocyclic transformation between cis-butadiene and cyclobutene has been studied at the HF and DFT levels with 6-311G** basis sets. The disrotatory stationary point with two imaginary vibrational frequencies is associated ...