New methods for the determination of elements in trace amounts
ZusammenfassungVerfahren werden besprochen, die in den letzten Jahren hauptsächlich in den Laboratorien des Autors entwickelt wurden. Der Überblick umfaßt folgende Kapitel: Reagentien und Reaktionen,…
Solubility of iron in carbonic acid solutions
From data in literature a model has been developed for the prediction of the concentration of dissolved iron, resulting from the corrosion of steel in carbonic acid. It explains the occurrence of…
Synthesis of Pyridophenanthrolines via a Three-Component Reaction Involving 1,10-Phenanthrolin-5-Amine
A facile and efficient method for the synthesis of benzo[b]pyrido[3,2-f][1,7]phenanthrolines and dipyrido[4,3-b:3′,2′-f][1,7]phenanthrolines has been developed in high yields. Using EtOH as a solvent…
Mechanism of iron ions sorption by chitosan-genipin films in acidic media.
- Medicine, ChemistryCarbohydrate polymers
It was observed that the Ch-Ge films only presented sorption capacity at pH 3.5 in the presence of α-hydroxypolycarboxylic acids, through electrostatic interactions, which allows proposing a broad application of Ch- Ge films to beverages and other liquids containing malic, tartaric or citric acids.
Heterogeneous Association of the Ions of Dyes in Solutions (Review)
General trends in the development of investigations of ion associates, involving an ion of an organic dye, in aqueous solutions are considered. The spectral-luminescent, equilibrium, and…
Effect of Temperature, Bicarbonate, and MEG Concentrations on CO2 Corrosion of Carbon Steels
- Materials Science
The CO2 corrosion of two mild steels has been studied as function of monoethylene glycol (MEG) and bicarbonate concentration at conditions where FeCO3 precipitation was sparse. The steel coupons we...
Iron(II) phenanthroline-resin hybrid as a visible light-driven heterogeneous catalyst for green oxidative degradation of organic dye
Abstract A novel resin immobilized iron(II) phenanthroline [FePR] is prepared, characterized and exploited to understand C–C/C–O cleavage in Rhodamine B dye under visible light (λ ≥ 420 nm). Studies…
Organic Reagents in Photometric Analysis
I. INTRODUCTION One of the most remarkable properties widely used in chemical analysis is the ability of a metal ion solution or a chemical substance to change its color under the effect of external…
Properties and structure of two fluorinated 1,10-phenanthrolines
Abstract We report the synthesis, X-ray structure, absorbance and emission of 4,7-bis(4-fluorophenyl)-1,10-phenanthroline and 4,7-bis-(4′-trifluoromethyl-biphenyl-4-yl)-1,10-phenanthroline.…
Coordination chemistry of iron triad metals with organic N-donor ligands and boron cluster anions [B10H10]2−, [B12H12]2−, and [B10Cl10]2−: Complexation and accompanying processes
- ChemistryRussian Journal of Inorganic Chemistry
Synthesis and structures of coordination compounds of the iron triad metals with N-donor ligands (Bipy, Phen, and BPA) and boron cluster anions [B10H10]2−, [B12H12]2−, and [B10Cl10]2− are described.…
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Mass spectrometry of metal chelates-III Further studies on metal oxinates.
- Chemistry, MedicineTalanta
The mass spectra of the oxmates of gallium, dysprosium, beryllium, samarium, cadmium, neodymium and gadolinium have been recorded and the results have been correlated with the structures proposed m the literature.
Volatile chelates of the alkali metals
Alkali metal derivatives of pentafluorodimethylheptan-3,5-dione and heptafluorodimethyloctan-4, 6-dione are described. Their mass spectra were examined and the integrated ion-current technique was…
Mass spectrometry of metal chelates-I Detection on the picogram scale.
- Chemistry, MedicineTalanta
A method has been developed for the detection and estimation of metals in the form of chelates in amounts down to 10(-12) g and the integrated ion current is directly proportional to the concentration of metal chelate.
Volatile metal chelates of monothioacetylacetone
The properties of volatile transition metal monothioacetylacetonates of the type M(II) (Ligand)2 are investigated. Their thermal behavior and mass spectral characteristics are described and the…
Methyleneiminodiacetic acid derivatives of some 7-hydroxycoumarins as analytical reagents
Fifteen derivatives of 7-hydroxycoumarin methyleneiminodiacetic acid were prepared and examined for their analytical reactions in an attempt to improve the selectivity and sensitivity of the calcein…
Studies on the analytical chemistry of hafnium and zirconium. Part II. Fluorimetric determination of hafnium in the presence of zirconium by using quercetin
Hafnium at concentrations of 0·2 per cent. m/m and above in hafnium-zirconium mixtures can be determined spectrofluorimetrically via its complex with quercetin in 55 per cent. perchloric acid. There…
Precipitation from homogeneous solution with N-benzoylphenylhydroxylamine acetate
Abstract A preliminary study has been made of the use of N -benzoyl-phenylhydroxylamine acetate as a source of N -benzoylphenylhydroxylamine in precipitation from homogeneous solution. Initial…
The mass spectrometry of metal chelates--II. Oxinates of common metals.
- Chemistry, MedicineTalanta
The mass spectra of the oxinates of zinc, iron(III), manganese(II), nickel, nickel, cobalt, aluminium, copper and magnesium have been measured and the structural significance of some of themass spectra is discussed.
The spectrofluorimetric determination of europium and terbium
The fluorescent properties of the tris chelates of europium and various β-diketones have been examined. Fluorinated ligands give better sensitivity than unfluorinated ligands, but the best…