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Five new Cu(II)/Mn(II) complexes Cu 2 (H L 1 ) 2 (H 2 O) 2 ( 1 ), [Mn 2 (H L 1 ) 2 (H 2 O) 4 ]·2H 2 O ( 2 ), {[Cu 5 (H L 2 ) 2 (SO 4 ) 2 (OH) 2 (H 2 O) 2 ]·5H 2 O} n ( 3 ), [Cu(H L 2 )] n ( 4 ), Cu 3 ( L 3 ) 2 (OH) 2 (H 2 O) 2 ( 5 ) based on three flexible ligands [bis-(1 H -tetrazol-5-ylmethyl)-amine (H 3 L 1 ), bis-(1 H -tetrazol-5-ylethyl)-amine (H 3 L 2 ) and 1,5-bis(5-tetrazolo)-3-thiapentane (H 2 L 3 )] have been synthesized and structurally characterized, which are in the wide range of 0-D to infinite 2-D network. The dinuclear complexes 1 and 2 can be further assembled into 3-D supramolecular frameworks via hydrogen-bonding interactions, respectively, resulting in a topological pcu and bcu-x net with the Schlafli symbol {4 12 ·6 3 } and {3 36 ·4 48 ·5 7 }. Complexes 3 and 4 feature an infinite 1-D chain and 2-D network, respectively. Both the 2-D framework of 4 and 2-D supramolecular network of 5 can be simplified into a four-connected {4 4 ·6 2 } topological sql network. In addition, the magnetism studies indicate antiferromagnetically coupled systems exist in 1 – 5 . [ABSTRACT FROM AUTHOR]

Three new complexes {[Cu( L1)2(NO3)2]⋅H2O}oo ( 1), {[Cu4( L2)2(OAc)8]-CH3CH2OH}oo ( 2) and [Cd2( L3)3(NO3)4(H2O)2]oo ( 3) ( L1=4-phenyl-7-(pyridine-3-yl)-1,2,4-triazolo[3,4-b]-1,3,4-thiadiazole, L2=4-(pyridine-3-yl)-7-phenyl-1,2,4-triazolo[3,4-b]-1,3,4-thiadiazole, and L3=4-(pyridine-4-yl)-7-phenyl-1,2,4-triazolo[3,4-b]-1,3,4-thiadiazole) have been synthesized and characterized by elemental analyses, IR spectra and single crystal X-ray diffraction. The structural analyses reveal that complex 1 is a neutral 2-D network structure with a 44 topology, 2 has a 1-D neutral coordination chain with a [Cu2(CH3COO)4] dinuclear structural unit bridged by four acetate ions, and 3 is a neutral rhombohedral grid structure. All the complexes are air stable at room temperature. Furthermore, the fluorescent properties of complex 3 and corresponding ligand L3 have been investigated and discussed. [ABSTRACT FROM AUTHOR]