A new manganese(II) phosphate templated by ethylenediamine: (C{sub 2}H{sub 10}N{sub 2})[Mn{sub 2}(HPO{sub 4}){sub 3}(H{sub 2}O)]. Hydrothermal synthesis, crystal structure, and spectroscopic and magnetic properties
A new manganese(II) phosphate templated by ethylenediamine, (C{sub 2}H{sub 10}N{sub 2})[Mn{sub 2}(HPO{sub 4}){sub 3}(H{sub 2}O)], has been prepared by hydrothermal synthesis and characterized by single-crystal diffraction data and spectroscopic and magnetic techniques. The compound crystallizes in the monoclinic space group P2{sub 1}/n with a = 21.961(7), b = 9.345(1), c = 6.639(2) {angstrom}; {beta} = 91.06(2){degree}; V = 1362.3(6) {angstrom}{sup 3}; and Z = 4. The structure consists of anionic sheets of formula [Mn{sub 2}(HPO{sub 4}){sub 3}]{sup 2-}, being the charge compensated by ethylendiammonium cations. The sheets are constructed by edge-sharing MnO{sub 6} octahedra, MnO{sub 5} trigonal bipyramids, and hydrogen phosphate tetrahedra. Within a layer, the edge-sharing octahedra and the trigonal bipyramids are linked in an alternating way, forming zigzag chains along the [001] direction. The ethylenediammonium cations and the water molecules are located in the interlayer space. The compound has been characterized by IR spectroscopy. A study of the compound by luminescence and diffuse reflectance spectroscopies is carried out. The Dq and Racah parameters have been calculated for Mn(II) ions in octahedral sites. The EST spectra at different temperatures of the compound show isotropic signals, with a g value that remains unchanged with variation in temperature. The intensity and the line width of the ESR signals increase continuously from room temperature to 4.2 K. Magnetic measurements from room temperature to 1.8 K indicate the presence of antiferromagnetic interactions. A value of J/k = {minus}0.75 K for the exchange parameter has been calculated by fitting the experimental magnetic data to a triangular lattice antiferromagnet of S = 5/2 spins.
- Research Organization:
- Univ. del Pais Vasco, Bilbao (ES)
- OSTI ID:
- 20050896
- Journal Information:
- Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 2 Vol. 12; ISSN CMATEX; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydrothermal synthesis, structural characterization and thermal, spectroscopic and magnetic properties of the inorganic-organic hybrid phosphate, [(C{sub 2}N{sub 2}H{sub 9})VF(PO{sub 4})]
Synthesis, structure and magnetic behavior of a new three-dimensional Manganese phosphite-oxalate: [C{sub 2}N{sub 2}H{sub 10}][Mn{sub 2}{sup II}(OH{sub 2}){sub 2}(HPO{sub 3}){sub 2}(C{sub 2}O{sub 4})]