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New hybrid organic–inorganic materials of the (MXDA)MeSO4 type, where Me – MnII, FeII, CoII or NiII and MXDA –m-xylylenediamine, were successfully synthesised using the solvothermal technique. Crystal structure studies proved that all of the obtained compounds crystallised in the orthorhombic crystal system and the P21ma space group (no. 26). All structures contain layers parallel to the (010) plane, built of metal atoms linked by SO42− anions. These layers are joined via m-xylylenediamine molecules acting as linkers which complete the distorted octahedral coordination sphere of the metal centres; MeO4N2– four oxygen and two nitrogen atoms. Magnetic studies for compounds where Me = MnII, CoII, and NiII reveal transitions to magnetic long-range ordered phases with temperatures of 14.4, 33.0, and 25.8 K, respectively, due to a domination of ferromagnetic interaction within the planes; m-xylylenediamine ligands efficiently separate adjacent metal ion sheets, rendering the superexchange coupling between the planes negligible. Nevertheless, at sufficiently low temperatures, dipole–dipole interaction leads to antiferromagnetic ordering of the magnetic moments belonging to adjacent MeSO4 layers. In addition to structure determination and magnetic studies, all materials were analysed using thermogravimetric measurements and temperature-dependent X-ray diffraction to test their thermal stability. The morphology of the crystallites was analysed using a scanning electron microscope. Sample (MXDA)FeSO4 was additionally studied using Mössbauer spectroscopy. [ABSTRACT FROM AUTHOR]

Two hybrid organic-inorganic materials, ZnS(1,3-diaminopropane)1/2 {1} and ZnSe(m-xylylenediamine)1/2 {2} were used as precursors of nanometric ZnS and ZnSe nanostructures. To obtain a single-phase semiconductor, refluxing in different solvents (acetonitrile, 1-octanol, 1,6-hexanediol) with various boiling points was applied. In this method, the synergic effect between temperature and the properties of the reactant medium was used to remove amines from hybrid material containing semiconducting slabs and to form pure nanometer-sized semiconducting grains whose properties were different than those of the corresponding bulk phases. The main goal of our research was to answer the question whether reaction conditions have an impact on the features of obtained semiconducting grains of ZnS and ZnSe. Accordingly, all obtained samples were analyzed using the powder diffraction method, UV-vis spectroscopy and scanning electron microscopy. [ABSTRACT FROM AUTHOR]

Using synchrotron powder diffraction data, two new complexes of CdBr2 with 3-fluoroaniline and 4-fluoroaniline were fully characterised with regard to their structure. Their crystal structures were solved and refined by means of powder diffraction techniques. The investigated materials belong to the group of hybrid inorganic-organic coordination polymers. The structures of both compounds are created by the same type, infinite chains formed by CdBr4N2 octahedra. Each cadmium cation is surrounded by four Br− anions, and two N atoms from two fluoroaniline molecules. The obtained structural data enable us to investigate the influence of the position of the F atom in the aniline ring on the crystal structure, as well as to interpret its thermal stability. Copyright © 2015 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

Two hybrid organic-inorganic materials, ZnS(1,3-diaminopropane)1/2 {1} and ZnSe(m-xylylenediamine)1/2 {2} were used as precursors of nanometric ZnS and ZnSe nanostructures. To obtain a single-phase semiconductor, refluxing in different solvents (acetonitrile, 1-octanol, 1,6-hexanediol) with various boiling points was applied. In this method, the synergic effect between temperature and the properties of the reactant medium was used to remove amines from hybrid material containing semiconducting slabs and to form pure nanometer-sized semiconducting grains whose properties were different than those of the corresponding bulk phases. The main goal of our research was to answer the question whether reaction conditions have an impact on the features of obtained semiconducting grains of ZnS and ZnSe. Accordingly, all obtained samples were analyzed using the powder diffraction method, UV-vis spectroscopy and scanning electron microscopy. [ABSTRACT FROM AUTHOR]