A novel Mn(II) oxalato-bridged 2D coordination polymer: synthesis, crystal structure, spectroscopic, thermal and magnetic properties

Abstract

Besides the fact that direct synthesis of oxalate-based Mn(II) complexes did not succeed a lot due to the high insolubility of manganese oxalate (Mn II (C 2 O 4) • 2H 2 O), a new 2D polymeric Mn(II) salt has been synthesized by slow evaporation at room temperature and its structure has been determined by single-crystal X-ray diffraction. The structure was solved by direct methods and refined to conventional agreement indices. The crystal structure is built from anionic, two-dimensional, honeycomb networks formed by the oxalatebridged Mn(II) ions, interleaved by 2,6-diaminopyridinium cations that are entrapped between the layers. The interactions between adjacent layers result from the extended network of intermolecular hydrogen bonds created by the mentioned cations and water molecules. The complex has been fully characterized by single crystal X-ray diffraction, FT-IR and UV-Vis spectroscopy, Rietveld refinement, TGA-DSC analysis and magnetic susceptibility. The title compound exhibits antiferromagnetic coupling between Mn(II) centres.

Synthesis and characterization of metal-mercaptoacetate hybrids and its application towards ring-opening polymerization of ε-caprolactone: a comparative study

“…The bandgap value of Mn complexes is reported as 2.76 eV [34]. The present investigation yielded a somewhat higher bandgap value due to the salt formation with the MAA.…”

“…1A(j)}. A diffractogram exhibits the d (211) , d (222) and d ( 321) crystal planes at 20.9, 33.14 and 48.7 and 35.9 0 respectively [34]. An important point noted here is that the d (222) plane of Mn 2+ appeared two times at 33.14 and 48.93 0 .…”

Crystal Structure and Catalytic Activity of Poly[bis(3-bromo-2-hydroxybenzaldehyde)-2-aminopyrimidinemagnesium(II)] for Hydrogenation of 1,3-Butadiene

“…Pd supported catalyst is mostly used in the selective hydrogenation of 1,3-butadiene due to the excellent catalytic activity, selectivity, and stability [2,3]. Manganese coordination polymers exhibit excellent activity in many fields, such as: catalytic property [4][5][6][7], magnetic properties [8][9][10][11], solvent adsorption [12], oxidative dehydrogenation [13], antitumor and antibacterial activities [14,15], lumines-cence properties [16][17][18][19], electrochemical property [20], and nonlinear optical property [21] and so on. So the researches on the manganese coordination polymer have attracted the attention of scientists.…”

SYNTHESIS AND OPTICAL PROPERTIES OF THE NOVEL Ho(5-SSA), (5-SSA = 5-SULFOSALICYLIC ACID) CAGE STRUCTURE

“…The materials designed with organic ligands and lanthanide ions which have a porous structure are called lanthanide metal-organic frameworks (Ln-MOFs). The design and synthesis of the 1D, 2D or 3D Ln-MOFs can be accomplished by intelligently choosing the appropriate combination of the binder lanthanide ions and organic ligands [20][21][22][23][24]. Ln-MOFs gain high absorption capacities through organic based chromophores.…”