Wittig homologation of 2-(chloromethyl)-2H-chromen-2-ol derivatives 2a–t with (ethoxycarbonylmethylene)triphenylphosphorane provided the 2-oxoethylidene-2,3-dihydrobenzoxepine-4-carboxy-lates 3a–t with Z (cis) selectivity. Various basic catalysts were studied for the reaction of 2-(chloromethy...

This paper reports the synthesis, spectroscopic characterizations and electrochemical behavior of the obtained tetradentate copper (II)-Schiff base complex with its two wings as ferrocenylaniline moieties. This new ferrocenic derivative with two ferrocenylaniline entities surrounding the copper ...

Infrared and Raman spectra of single crystal samples of acenaphthene-d10 have been recorded over the entire energy range of the fundamental vibrations. The spectra in all independent polarizations are presented. The analysis of the Raman spectra was assisted by the measurement of the depolarizat...

Viscosity B-coefficients have been obtained for aqueous solutions of Et3PrNi, EtPr3NI, and Pr4NI at 25°C. The results show that n-propyl is the smallest alkyl group that can cause water structure-promotion.

Corrosion inhibition of N80 steel in a 15% HCl solution was studied using two synthesized triazine derivatives, namely: N2-(4-(2-amino-6-(4-methoxyphenyl)pyrimidine-4-yl)phenyl)-N4,N6-diphenyl-1,3,5-triazine-2,4,6-triamine (APTT) and N2-(4-(5-(4-methoxyphenyl)isoxazol-3-yl)phenyl)-N4,N6-diphenyl...

Samples of 2,4,6-trinitroaniline (PAM), 2,4,6-trinitro-N-(2,4,6-trinitrophenyl)aniline (DPA), N,N′-bis(2,4,6-trinitrophenyl)-3,5-dinitropyridine-2,6-diamine (PYX) and N,N′,N″-tris(2,4,6-trinitrophenyl)-1,3,5-triazine-2,4,6-triamine (TPM) were exposed to heat or to shock and then analysed chro...

The bisadduct of Cu(II) chloride with the potential nonadentate ligand N2,N2,N4,N4,N6,N6-hexakis((pyridin-2-yl)methyl)-1,3,5-triazine-2,4,6-triamine, [Cu2Cl4(L)]·2CH3CN, is described. Each of the 2 Cu(II) ions is in a 5-coordinate geometry, intermediate between square pyramidal and tetragonal p...

This work reports an experimental and theoretical study on 2-hydroxyethylammonium formate (2-HEAF) protic ionic liquid. Relevant physicochemical properties, density, speed of sound, dynamic viscosity and surface tension, were measured as a function of temperature in the 298.15 to 328.15 K range....

The photoinduced electron transfer (PET) reactions have been characterized using laser flash photolysis, wherein a photoexcited acceptor, the excitation triplet state of duroquinone (3DQ⁎), abstracts an electron from a ground state donor, aniline or diphenylamine. After adding the ionic liquid (...

The investigation focused on the electrochemical oxidation of imidazolium and pyridinium ionic liquids (ILs), 1-butyl-3-methyl-imidazolium chloride (IM14 Cl), 1-hexyl-3-methyl-imidazolium chloride (IM16 Cl), 1-methyl-3-(2-phenylethyl)-imidazolium chloride (IM1-2Ph Cl), 1-butyl-4-methylpyridinium...

Complexes with the CpRu(PPh3) fragment bound by iminopyridine ligands functionalised by a Hantzsch dihydropyridine donor of hydride ion or by a Hantzsch pyridinium acceptor of hydride ion have been prepared, and their redox chemistry studied by cyclic voltammetry and EPR and UV–Vis spectroelect...

An acidic ionic liquid (IL), i.e. 1-(carboxymethyl)pyridinium chloride, is synthesized and investigated for its untapped potential to dissolve cellulose, chitosan and chitin with concentrations of up to 11, 10 and 5 wt.%, respectively. Interestingly, the optimum water content of the IL/water tow...

Fluorescence detection of various pharmaceuticals and the amino acid tryptophan (low molecular weight organic compounds) as well as the enzyme lactate dehydrogenase LDH (high molar mass compound) has been studied in aqueous solutions using alkyl ammonium formate ionic liquids as the primary solv...

In the present study, new series of pyridinium carboxylate protic ionic liquids (PILs) were synthesized by pairing pyridinium cation with carboxylate anion from C1–C3 forming pyridinium formate ([C5H6N+][HCOO−]), pyridinium acetate ([C5H6N+][CH3COO−]) and pyridinium propionate ([C5H6N+][CH3CH2C...

This work investigates the synthesis and structural properties of a hydrogen-bonded salt of the [Hg(SC6H4-2-CO2)2]2− ion. The known bis(thiosalicylato)mercury(II) complex [Hg(SC6H4-2-CO2H)2], dissolves in pyridine (py), from which the crystalline pyridinium salt (pyH)2[Hg(SC6H4-2-CO2)2] can be i...

Introduction2-Amino-6-[18F]fluoro-9-(4-hydroxy-3-hydroxy-methylbutyl) purine (6-[18F]FPCV) was prepared via a one-step nucleophilic substitution and evaluated as a novel probe for imaging the expression of herpes simplex virus type 1 thymidine kinase (HSV1-tk) reporter gene.

Sediment is actively being subducted in every convergent margin worldwide. Yet, geochemical data for arc lavas from several subduction zones, such as Northern Tonga and Costa Rica have revealed either attenuated or limited evidence for sediment in their mantle source regions. Here we use thalliu...

Forty-two thallium, forty-two lead, forty-one bismuth, and forty-two polonium isotopes have so far been observed; the discovery of these isotopes is described. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented.

Thallium (Tl) isotope compositions of ocean island basalts (OIBs) have been proposed as a novel tracer of subducted oceanic crust and sediments in ocean island basalt sources, which could act as direct confirmation that deep mantle recycling eventually resurfaces through mantle upwelling to form...

Studies on the synergistic extraction of phosphorus, arsenic and silica as impurities from sodium tungstate and molybdate solutions with a solvent mixture of primary amine and tributyl phosphate (TBP) were made. The experimental results indicate that phosphorus, arsenic and silica can be extract...