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Now showing items 31-40 of 66
Analysis of polyphenols using capillary zone electrophoresis - Determination of the most effective wine sample pre-treatment method
(2010)
A simple CZE method has been developed for the simultaneous determination of eight polyphenolic compounds. The influence of several experimental conditions such as buffer (concentration and pH) and temperature were studied. ...
Mn12 benzoate thin films on Si substrates fabricated by matrix assisted pulsed laser evaporation
(2010)
We report on the successful implementation of Matrix Assisted Pulsed Laser Evaporation, to obtain films of the single molecule magnet Mn12 benzoate on Si substrates. The films have been characterized by optical microscopy, ...
Detosylation of 3-amino-1-tosylindole-2-carbonitriles using DBU and thiophenol
(2010)
Attempted detosylation of the 3-amino-1-(p-tosylamino)indole-2-carbonitriles 4a-c using either K2CO3 in EtOH or DBU in PhH at reflux gives unexpectedly the 3-(N-p-tosylamino)indole-2-carbonitriles 5a-c, respectively in ...
End-linked semifluorinated amphiphilic polymer conetworks: Synthesis by sequential reversible addition - Fragmentation chain transfer polymerization and characterization
(2010)
One-pot, sequential reversible addition - fragmentation chain transfer (RAFT) polymerization was employed for the preparation of five end-linked semifluorinated amphiphilic polymer conetworks based on 2,2,2-trifluoroethyl ...
Zinc(II) and nickel(II) benzoate complexes from the use of 1-methyl-4,5-diphenylimidazole
(2010)
Two new complexes, [Zn (O2CPh)2 (L)2] · 2MeOH (1 · 2MeOH) and [Ni2(O2CPh)) 4(L)2] · 2MeCN (2 · 2MeCN), have been synthesized and characterized by X-ray analysis in the course of an ongoing investigation of the MII/X-/L[MII ...
Combining azide, carboxylate, and 2-pyridyloximate ligands in transition-metal chemistry: Ferromagnetic NiII 5clusters with a bowtie skeleton
(2010)
The combined use of the anion of phenyl(2-pyridyl)ketone oxime (ppko-) and azides (N3 -) in nickel(II) carboxylate chemistry has afforded two new NiII 5clusters, [Ni5(O2CR′)2(N3)4(ppko)4(MeOH)4] [R′ = H (1), Me (2)]. The ...
Polymer networks: Recent developments
(2010)
Polymer networks have long been the subject of study by chemists, physicists, biologists, material scientists and engineers, aiming to understand the fundamentals of their preparation and behavior, but also to adopt them ...
Microwave assisted synthesis of 3-aminoindole-2-carbonitriles from anthranilonitriles via N-unprotected 2-(cyanomethylamino)benzonitriles
(2010)
Anthranilonitrile 3a, 4,5-dimethoxyanthranilonitrile 3b and 5-nitroanthranilonitrile 3c, react with paraformaldehyde, KCN and ZnCl2 in acetic acid under acid catalysis (H2SO4) in a sealed tube at ca. 55 °C to give the ...
Redox chemistry of sulphate and uranium in a phosphogypsum tailings dump
(2010)
The present study aims to assess the effect of redox conditions existing within the tailings dump on the stability of phosphogypsum (e.g. sulphate reduction) and uranium(VI). Phosphogypsum sampling and in-situ measurements ...
Mononuclear and dinuclear manganese(II) complexes from the use of methyl(2-pyridyl)ketone oxime
(2010)
The reactions of methyl(2-pyridyl)ketone oxime, (py)C(Me)NOH, with manganese(II) sulfate monohydrate have been investigated. The reaction between equimolar quantities of MnSO 4 H 2 O and (py)C(Me)NOH in H 2 O lead to the ...