Abstract
A new manganese(II) phosphite templated by ethylenediamine has been prepared by hydrothermal synthesis and characterized by X-ray diffraction data and spectroscopic techniques. A study of the evolution of the synthetic process suggests the presence of a manganese(II) phosphite as intermediate in the first steps of the reaction. The (C2H10N2)[Mn3(HPO3)4] compound crystallizes in the triclinic space group P-1 with a = 5.459(1) A, b = 5.460(2) A, c = 14.194(5) A, α = 80.65(2)°, β = 85.41(1)°, γ = 60.04(2)°, V = 361.7(2) A3, and Z = 1. The compound exhibits a layered structure along the c axis with the ethylenediammonium cations located between the sheets. Within the layers the face-sharing MnO6 octahedra give rise to trimeric entities which are interconnected by HPO3 tetrahedra. Studies of luminescence and diffuse reflectance spectroscopies have been carried out. The values of the Dq = 875 cm-1 and Racah parameters, B = 660 and C = 3160 cm-1, have been calculated. The ESR spectra at different temperatures sh...
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