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Abstract Positronium (a hydrogen-like bound state of an electron and a positron) is a convenient probe to determine the sizes of subnanometric free volumes (voids) in condensed matter. A review of experimental methods used in positron spectroscopy and examples of their application to the free...
Abstract The lanthanide(III) complexes with 2,3-pyridinedicarboxylate ligand (PDC) were obtained as crystalline compounds from the water solutions. These compounds form the series of Ln 2 (PDC) 3 ・ nH 2 O. All compounds are stable in air and insoluble in both water and common organic solvents....
Abstract A series containing ten aryl 3-(substituted phenyl) bicyclo (2.2.1) heptene-2-yl-methanone derivatives including 3- (substituted phenyl) bicyclo (2.2.1)hepten-2-yl-(pyren-1-yl)- methanones have been synthesized by aqueous phase fly-ash catalyzed (4+2) Diels-Alder cyclo addition reaction...
Abstract Some 4-aryl-5,6-dihydro-6-(substituted phenyl)-4H-1,3-oxazine- 2-amine derivatives including 4-(4-methyl-1-naphthyl)-5,6- dihydro-6-(substituted phenyl)-4H-1,3-oxazine-2-amines have been synthesised by hydroxyapatite catalyzed solvent-free cyclization of aryl chalcones and urea using...
Abstract A series of Schiff’s bases (aryl E-imines) have been derived from the perchloric acid catalyzed condensation of aryl amines and substituted benzaldehydes. The yield of the Schiff’s bases are more than 80%. The synthesized Schiff’s bases are characterized by their physical constants,...
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