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Abstract: Three heterometallic coordination polymers have been prepared by reacting tripodal metalloligand AlL3 (L=3-(4-pyridyl)acetylacetonate) with MCl2 (M=ZnII, CdII and HgII). The coordination preferences of the metal ions are found to have pronounced effects on the structural topologies. X-ray crystal structural analyses reveal that the complexes display three different kinds of structures. Complex 1 has a distorted ladder-like one-dimensional structure; 2 is a 2D layered structure consisting of rectangular moieties; 3 adopts a helical arrangement. [Copyright &y& Elsevier]

Reaction of Ni II acetate and 4-methylphthalic acid (H 2 mph) with 1,2-bis(4-pyridyl)ethane (bpa) or 1,2-bis(4-pyridyl)ethene (bpe) affords two 3-D unusual metal–organic frameworks {[Ni(Hmph) 2 (bpa)(H 2 O) 2 ][Ni 2 (mph) 2 (bpa) 3 ]} n ( 1 ) and [Ni 2 (mph) 2 (bpe) 2 (H 2 O) 3 ] n ( 2 ). 1 represents a polythreaded supramolecular architecture consisting of distinct 1-D armed chains and 2-D sql sheets based on the binuclear [Ni 2 (mph) 2 ] units, however, 2 shows a rare 3-fold interpenetrating 10 3 -ths network. [ABSTRACT FROM AUTHOR]

A new supramolecular architecture, {[Zn(FDC)(phen)(H 2 O)]·0.5H 2 O} n ( 1 ), was obtained from mixed rigid ligands [9-fluorenone-2,7-dicarboxylic acid (H 2 FDC), 1,10-phenanthroline (phen)] and zinc(II) nitrate under hydrothermal reactions, which displays a charming 1D → 3D polycatenated motif based on 1D single-armed polymeric chains via powerful π π stacking interactions. In addition, the thermal stability and photoluminescence property of 1 were also investigated. [ABSTRACT FROM AUTHOR]

Through hydrothermal reactions, 4,4′-bipyridine (bpy) co-ligands firstly was introduce to CdII-H2FDC system (H2FDC=9-fluorenone-2,7-dicarboxylic acid), generating a new coordination polymer {[Cd2(FDC)2(bpy)]∙H2O}n (1). Compound 1 has a pillar-layer 2-fold interpenetrating pcu network, based on the square-grid tetranuclear [Cd4(COO)8] units. Interestingly, 1 shows a blue-shifted photoemission, as well as enhanced fluorescence lifetime compared with the pure H2FDC ligand. [ABSTRACT FROM AUTHOR]