Browsing by Title Artículos de revistas
Now showing items 583-602 of 2801
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(Elsevier, 2012-02-03)In the present work three different SPME fibers have been investigated for simultaneous determination of methyl-, butyl- and phenyltins by using gas chromatography-pulsed flame photometer detection (GC-PFPD). The optimal ...
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(Royal Society of Chemistry, 2014)In the present work, the synthesis and structural characterization of four new polyoxovanadoborate (BVO) frameworks based on the [V12B 18O60H6]10- polyanion are reported: (NH4)8(1,3-diapH2)[V12B 18O60H6]·5H2O (1), K ...
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(2006)The ionic cobalt (II) title complex [Co2(OH)2 (Ac)3(Bipy)2]·K·2(H2O) (where Ac: Acetate, Bipy: 2,2-bipyridine) consists of anionic bimetallic unit in which cobalt ions are bridged by hydroxo and acetate ligands, balanced ...
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(2009)A structural and magnetic characterization of a trinuclear chiral Mn(ll) formate three-dimensional framework exhibiting a triangular arrangement is presented. Compound Na3[Mn3(HCOO)9] was obtained by solvothermal synthesis ...
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(SOCIEDAD CHILENA DE QUIMICA, 1998-12)The crystal structure of C42H37O3P2Br has been determined by single crystal X-ray diffraction. The title compound is monoclinic, space group P2(1)/n (Nr. 14), with unit cell parameters a = 11.220(6), b = 14.345(10), c = ...
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(2014)4,40-(Disulfanediyl)dibutanoic acid (dtba) and 4,40-bipyridine (4,40-bpy) crystallize in an 1:1 ratio, leading to the title co-crystal with composition C8H14O4S2 C10H8N2. A distinctive feature of the crystal structure ...
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(SOCIEDAD CHILENA DE QUIMICA, 1998-12)An X-ray diffraction study of the 7-bromo-5,8-dihydroxy-4,4-dimethyl-4H-naphthalen--1-one (1), obtained by bromination of 5,8-dihydroxy-4.4-dimethyl-4H-naphthalen-1-one with molecular bromine, gave unambiguous proof of its ...
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(2014)The structure of the title compound [Sm2(crot)6(H2O)4]2·3(H2O) (I), (crot= crotonate = butenoate = O2CCHCHCH3)] consists of two independent, centrosymmetric dimeric units, of similar composition but diverse coordination, ...
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(2014)The asymmetric unit of the title compound, C8H9NO2 H2O consists of an isolated 4-(ammoniomethyl)benzoate zwitterion derived from 4-aminomethylbenzoic acid through the migration of the acidic proton, together with a ...
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(Hindawi Publishing Corporation, 2015)A systematic study of the synthesis of V2O5 nanostructured materials using macromolecular PS-co-4-PVP center dot(VCl3)(y) and chitosan center dot(VCl3)(y) complexes is presented. It is demonstrated that various coordination ...
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(BLACKWELL MUNKSGAARD, 2003-11)The crystal and molecular structure of the monomeric title compound, chlorotetrakis(2-methylimidazole)copper(II) chloride, [CuCl(C4H6N2)(4)]Cl, is presented, and compared with those of two other closely related monomeric ...
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(Royal Society of Chemistry, 2009)A new extended metal-organic framework [Cu(H(2)btec)(bipy)](infinity) (1) (H(4)btec=1,2,4,5-benzenetetracarboxylic acid; bipy= 2,2'-bipyridine) has been hydrothermally synthesized. Violet crystals are formed in a monoclinic ...
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(2008)Cu(2+) ions and and GSH molecules interact swiftly to form the complex Cu(I)–glutathione. We investigated the potential capacity of such complex to reduce molecular oxygen. The addition of SOD to a solution containing ...
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(Sociedad Chilena de Química, 2015)We report the synthesis and crystal structure of a copper (II) polymeric complex (I) prepared by reaction of Cu(ClO4)(2)center dot 5H(2)O with H(3)tea (triethanolamine,) and dpe (1,2-di(4-pyridyl)ethylene). in ethanol. The ...
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(Elsevier, 2017)A new CuII–GdIII heterometallic coordination polymer was obtained by a two-step synthesis, using the molecular complex [Cu(H2IDC)2(2,20-bipy)] 2H2O (1) as metalloligand and oxalate as auxiliary ligand (H3IDC = ...
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(MDPI, 2020)The aerobic oxidation of cyclohexene was done using the heterometallic metal organic frameworks (MOFs) {[La2Cu3(mu-H2O)(ODA)(6)(H2O)(3)].3H(2)O}(n)(LaCuODA)) (1) and {[La2Co3(ODA)(6)(H2O)(6)].12H(2)O}(n)(LaCoODA) (2) as ...
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(Royal Society of Chemistry, 2017)The catalytic performance of the novel framework {[Cu3Lu2(ODA)6(H2O)6]·10H2O}n was tested in the oxidation of alkenes and benzylic hydrocarbons, using tert-butyl hydroperoxide (TBHP) and molecular oxygen (O2) as oxidants. ...
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(Elsevier Ltd, 2019)Cu0(core)-Au0(shell) (Cu@Au) bimetallic nanoparticles (NPs) synthesized under microwave-assisted heating were interrogated for surface enhanced Raman scattering (SERS)-active substrates. NPs characterization, by XRD, XPS ...
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CULTURE CONDITIONS FOR ENHANCED CELLULASE PRODUCTION BY A NATIVE STRAIN OF PENICILLIUM-PURPUROGENUM (RAPID SCIENCE PUBLISHERS, 1994-05)A cellulolytic wild-type strain of Penicillium purpurogenum was isolated from a soil sample in southern Chile. It grew best at 28-degrees-C from an inoculum of 4 x 10(7) spores/100 ml medium. Highest endoglucanase activity ...