Reactions of 2-（2-benzoimidazolyl）acetonitrile and Na N3 with Zn SO4 or Zn Cl2 in the presence of nicotinic acid in the mixture of Et OH/H2 O afforded a mononuclear compound [Zn（L1）2]（1） and a 1-D polymer [Zn（L1）Cl]n（2）, respectively（L1 = 5-[（benzoimidazolyl）methyl]-1H-tetrazolate）. However, in the similar condition except that imidazole was added instead of nicotinic acid, the reaction afforded a 1-D compound [Zn（L1）2]n（3） featuring triply helical chains via the π-π stacking of ligands. They are characterized by elemental analysis and IR, and their structures have been determined by X-ray crystallography. Thermal stability of these compounds was measured by TGA and their luminescent properties were investigated at room temperature.
A novel 2-D {[Cd4（tpt）2（Cl）4（2,4-pdc）2]·4H2O}n （1） has been synthesized from the hydrothermal reaction of 3,5,6-tris（2-pyridyl）-1,3,5-triazine （tpt）, hydrated CdCI2, and 2,4-dicarboxylic acid （2,4-H2pdc）. Compound 1 crystallizes in triclinic, P1^- space group with a = 8.9434（5）, b = 9.5486（7）, c = 17.5772 （8） A, a = 75.014 （5）, β= 83.778（5）, γ = 68.304（6）°, V = 1347.14（14） A^3, C50H38Cd4C14N14O12, Mr = 1618.32, Dc = 1.990 g/cm^3, S = 0.95,μ（MoKa） = 1.83 mm^-1, F（000） = 788, Z = 1, R = 0.039 and wR = 0.080. The structure consists of tetranuclear [Cd4（tpt）2（Cl）4]^4＋ cores as the secondary building unit, which is further connected by the ligand pdc2 to give a 2-D extended structure. Tpt entities are located on both sides of each 2-D framework and act as ＇side arms＇ to form a corrugated layer and the adjacent layers are arranged in a tongue-and-groove interdigitating fashion. 1 was characterized by IR, TGA, PX1RD, and elemental analysis. The solid state luminescent properties were also investigated at room temperature.
