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Three new supramolecular coordination polymers based on 2,2′-bipyridyl-3,3′-dicarboxylic acid (H2BPDC) and Mn(II), Fe(II), and Zn(II) were synthesized under hydrothermal conditions and characterized with single-crystallographic X-ray analysis and IR spectrum. Complex 1 exhibits a 1-D, chain-like structure, which is further connected to 2-D supramolecular layer structure through hydrogen bonds. Complex 2 exhibits a 3-D supramolecular structure constructed from 1-D chains through hydrogen bonds and π–π interactions. Like 1, 3 also shows 2-D supramolecular layer structure based on 1-D chains. Furthermore, the fluorescence of 3 was studied. [ABSTRACT FROM PUBLISHER]

The copper complex {[Cu(2,2′-bpy)(azpy)(H 2 O)(ClO 4 )} n 1 (2,2′-bpy=2,2′bipyridine, azpy=4,4′-azopyridine), has been synthesized and characterized. X-ray analysis reveals that copper is coordinated by two N atoms of 2,2′-bpy, two N atoms from two bridging azpy ligands, one O atom of coordinated water and O atom from $\rm {ClO}_4^-$ and has a distorted octahedral coordination environment in complex 1 . Copper ions are linked to each other through bridging azpy ligands to form a one-dimensional chain. Stacking the one-dimensional chains results in the formation of rhombic channels with ca . 6 Å × 6 Å. Variable-temperature magnetic susceptibility studies show that there is a weak antiferromagnetic interaction between the copper ions. [ABSTRACT FROM AUTHOR]

The complex [Cu(tn) 2 ] 2 [Co(CN) 6 ](ClO 4 )ċ2H 2 O (tn = trimethylenediamine) has been prepared and characterized by elemental analysis, IR, electronic and electronic spin resonance spectra and magnetic properties. The x-ray structure analysis shows that each [Co(CN) 6 ] 3- ion coordinates to four [Cu(tn) 2 ] 2+ cations through four cyano nitrogen atoms in the same plane, providing a two-dimensional square network structure, formed from Co-CN-Cu(tn) 2 -NC-Co linkages. [ABSTRACT FROM AUTHOR]

A three-dimensional supramolecular compound [Mn(N 3 ) 2 (H 2 O) 3 (hmt)] n , where hmt stands for hexamethylenetetramine, was synthesized and characterized by IR, crystal structure and magnetic susceptibility. The compound [Mn(N 3 ) 2 (H 2 O) 3 (hmt)] n , crystallizes in the orthorhombic system, space group P n 2 1 a , with a = 6.5201(9), b = 9.322(2), c = 22.192(3) Å, β = 90° and Z = 2. The Mn atom is coordinated in an octahedral arrangement by three nitrogen atoms from three azido ions, and three oxygen atoms from three water molecules, respectively. The azide ligand bridges Mn atoms in µ-1,3 fashion, forming a zigzag chain. Hmt connected with the zigzag chain by hydrogen bonds, to form a three-dimensional supramolecular structure. The magnetic susceptibility data show that there is an antiferromagnetic exchange interaction in the title compound. The data were modeled using an infinite chain model leading to J = - 4.8 cm -1 . [ABSTRACT FROM AUTHOR]

A heterometallic assembly, [Mn(salen)] 2 [Ni(CN) 4 ]·1/2H 2 O (where salen=N, N′-ethylene-bis(salicylideneiminato)-dianion), has been prepared from the reaction of [Mn(salen)H 2 O]ClO 4 ·H 2 O with K 2 [Ni(CN) 4 ]·H 2 O in methanol/water. The compound crystallizes in the tetragonal space group P 4/ncc with the cell dimensions of a =14.604(2) Å, c =16.949(3) Å, and Z=4. The compound assumes a two-dimensional distorted square network structure, formed from ${\rm Ni}{{\hskip -1pt -\!\!\!- \hskip-.5pt}}{\rm CN}{{\hskip -1pt -\!\!\!- \hskip-.5pt}}{\rm Mn(salen)}{{\hskip -1pt -\!\!\!- \hskip-.5pt}}{\rm NC}{{\hskip -1pt -\!\!\!- \hskip-.5pt}}{\rm Ni}$ [ABSTRACT FROM AUTHOR]