Magnetic Functional Complex Design, Synthesis, Characterization, And Nature Study

In this paper, we choice oxalate as bridged ligands, 1,10-phenanthr as terminal ligands, transition metal ion as reaction center to synthesis new complexes. Cu(H₂O)(phen)(ox).H₂O, {[Mo(phen)₃][MoNa(ox)₃]}_n (phen=1,10-phenanthroline, ox=oxalate), Fe(H₂O)₃(phen)SO₄, {[Fe(phen)₃][FeNa(ox)₃]}_n, were synthesized and characterized by IR, EA, EPR, SEM, TEM and X-ray diffraction analysis. In my work, two kinds of nanoporous materials are studied, one is honst-guest structure architected fully by covalent bonds, and the other is constructed by inter-molecular interactions, including inter-molecular H-bonds and π-π interaction.For the first model complexes, Cu(H₂O)(phen)(ox).H₂O, Fe(H₂O)₃(phen)SO₄ were obtained by hydro-thermal reaction. A series of characterizations of IR, XPS, SEM and X-ray diffraction determine the molecular structure. The complexes pile together by inter-molecular H-bonds and π-π interaction, which results in organic-inorganic layers arranging alternately. Inter-molecular H-bonds link the adjacent molecular within inorganic layers, while in organic layers, π-π interaction from aromatic rings connect adjacent inorganic layers.For the other model complexes, {[Mo(phen)₃][MoNa(ox)₃]}_n (phen=1,10-phenanthroline, ox=oxalate), Fe(H₂O)₃(phen)SO₄, {[Fe(phen)₃][FeNa(ox)₃]}_n,were synthesized and characterized by IR, EA, EPR, SEM, TEM and X-ray diffraction analysis. In first type, host-guest supra-molecular complex shows cavities with nano size. The framework was constructed fully by covalent bonds, which possesses certain stability. Meanwhile, guest molecule with diameter close to 1nm occupied the cavities, which further improve the stability.By the means of SEM, TEM, the relationship between micro- and macro structure was studied. We found that geometry of micro- and macrostructure were coherent.