Thermoplastic linear ionomer based on sulphonated poly(etherurethane)—styrene-acrylate copolymer, doped with natural Fe2+, was studied by Mössbauer spectroscopy at T = 78 and 290 K to monitor the chemical state of Fe species. The Fe2+ added to aqueous suspension of the system was only partly oxidised in the course of polymer film preparation and drying in air. The oxidised part comprised a magn...

Tryptanthrin is one of the most important members of indoloquinoline alkaloids. We obtained this alkaloid from Isatis. Two novel FeII and CoII complexes of tryptanthrin were first synthesized. Single-crystal X-ray diffraction analyses show that these complexes display distorted four-coordinated tetrahedron geometry via two heterocyclic nitrogen and oxygen atoms from tryptanthrin ligand. Binding...

ISO SWS spectra of H2 pure rotational and rovibrational transitions, as well as [Feii], and [Siii] fine structure lines were obtained for one position on the photodissociation region (PDR) adjacent to the bright rim of the S140 Hii region. The gas density is 104 cm 3 and the incident UV flux 400 at the location of the ionization front. Our PDR model analysis shows that the relative H2 line inte...

Four examples are given of problems that arise in the study of emission-line stars, each of which deserves further quantitative study. (1) Archival slit spectra of η Car show that epochs of low excitation have occurred regularly in the 2020 day period of Damineli et al. since at least 1948. They last about 10 percent of the period. Earlier slit spectra (1899-1919) suggest that the the object wa...

Narsimhulu Pittala1, Smail Triki1, Franck Thétiot1, Kamel Boukheddaden2, Guillaume Chastanet3, Mathieu Marchivie3 1Department Of Chemistry, UMR CNRS 6521, Université De Bretagne Occidentale (UBO), Brest, France, 2Groupe d\'étude de la matière condensée (GEMaC), Université de Versailles Saint-Quentin, Versailles, France, 3CNRS, Université Bordeaux, ICMCB, UPR 9048, Bordeaux, France E-mail: narsi...

ABSTRACT. The mechanical attachment method was used to modify the glass carbon electrode (GCE) with polyaniline nanoparticles (PANI NPs) produce a new nanosensor (PAN NPs/GCE). Electrochemical properties studied by nano working using cyclic voltammetric (CV) technique develop oxidation – reduction reaction. K4[Fe(CN)6] solution is one of standard solutions for CV titration redox peak current Fe...