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A New Approach for Histamine Functionalized Nanoparticles as Sorbent Phase for ...
Lopes,Daniela; Morés,Lucas; Bernardi,Gabrieli; Campedelli,Roberta R.; Pinheiro,Gabriela; Souza,Bruno S. de; Carasek,EduardoIn this study, for the first time, histamine-functionalized magnetic nanoparticles (HIS-MNP) were used as sorbent phase combined with bar adsorptive microextraction (BAµE) for the determination of methylparaben (MP), ethylparaben (EP), propylparaben (PP), and butylparaben (BP) in water samples by high performance liquid chromatography coupled with diode array detection (HPLC-DAD). Extraction and desorption cond...
Substituted tridentate pyrazolyl ligands for chromium and nickel-catalyzed ethy...
Oliveira,Lucilene L. de; Campedelli,Roberta R.; Bergamo,Adão L.; Santos,Ana H. D. P dos; Casagrande,Osvaldo L.Two new chromium(III) complexes [CrCl3(L)] based on tridentate ligands (1a, L = bis[2-(3-phenyl-1-pyrazolyl)ethyl)]amine; 2a, L = bis[2-(3-methyl-5-phenyl-l-pyrazolyl)ethyl]sulfide) have been prepared and characterized by elemental analysis. Upon activation with methylaluminoxane (MAO), these pre-catalysts showed high turnover frequencies for ethylene oligomerization under optimized conditions (TOFs = 22.9-36.4...