Dong Yu-Bin, Ma Jian-Ping, Huang Ru-Qi, Smith Mark D, zur Loye Hans-Conrad
College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Key Lab of Chemical Functional Materials of Shandong Province, Jinan 250014, P. R. China.
Inorg Chem. 2003 Jan 27;42(2):294-300. doi: 10.1021/ic0204225.
The coordination chemistry of the oxadiazole-containing rigid bidentate ligands 2,5-bis(4-pyridyl)-1,3,4-oxadiazole (L2) and 2,5-bis(4-aminophenyl)-1,3,4-oxadiazole (L3) with inorganic Ag(I) salts has been investigated. Four new coordination polymers were prepared by solution reactions and fully characterized by infrared spectroscopy, elemental analysis, and single-crystal X-ray diffraction. [[Ag(L2)]SO3CF3]n (1)(triclinic, P1; a = 10.1231(7) A, b = 13.9340-(10) A, c = 13.9284(10) A, alpha = 116.7300(10) degrees, beta = 94.6890(10) degrees, gamma = 108.7540(10) degrees, Z = 4) was obtained by the combination of L2 with AgOTf in a CH2Cl2/CH3OH mixed-solvent system and features a unique one-dimensional elliptical macrocycle-containing chain motif. The approximate dimensions of the rings are ca. 22 x 11 A. [Ag-(L2)(CH3OH)0.5(H2O)0.5]n (2) (triclinic, P1; a = 8.4894(5) A, b = 13.9092(8) A, c = 14.1596(8) A, alpha = 71.1410(10) degrees, beta = 77.3350(10) degrees, gamma = 81.5370(10) degrees, Z = 4) was generated from the reaction of L2 with AgClO4 in a H2O/CH3OH mixed-solvent system and consists of one-dimensional chains that are linked to each other by weak noncovalent pi-pi interactions into two-dimensional sheets. Uncoordinated ClO4-counterions and guest solvent molecules are located between the layers. [[Ag(L2)]NO3]n (3) was obtained by the combination of L2 with Ag(NO3)2 in a MeOH/H2O mixed-solvent system (triclinic, P1; a = 8.3155(6) A, b = 8.8521(6) A, c = 9.8070(7) A, alpha = 74.8420(10) degrees, beta = 77.2800(10) degrees, gamma = 68.6760(10) degrees, Z = 2). In the solid state, it exhibits an interesting pair of chains associated with C-H...O hydrogen bonds. [[Ag(L3)]SO3CF3]n (4) is generated from L3 and AgSO3CF3 in a CH2Cl2/MeOH mixed-solvent system and crystallizes in the unusual space group Pnnm, with a = 7.9341(4) A, b = 11.5500(5) A, c = 18.1157(8) A, and Z = 4. It adopts a novel three-dimensional structural motif in the solid state with big rhombic channels (ca. 15 x 10 A).
研究了含恶二唑的刚性双齿配体2,5-双（4-吡啶基）-1,3,4-恶二唑（L2）和2,5-双（4-氨基苯基）-1,3,4-恶二唑（L3）与无机Ag（I）盐的配位化学。通过溶液反应制备了四种新型配位聚合物，并通过红外光谱、元素分析和单晶X射线衍射对其进行了全面表征。[[Ag（L2）]SO3CF3]n（1）（三斜晶系，P1；a = 10.1231(7) Å，b = 13.9340-(10) Å，c = 13.9284(10) Å，α = 116.7300(10)°，β = 94.6890(10)°，γ = 108.7540(10)°，Z = 4）是通过L2与AgOTf在CH2Cl2/CH3OH混合溶剂体系中反应得到的，具有独特的一维含椭圆大环链结构单元。环的近似尺寸约为22×11 Å。[Ag-(L2)(CH3OH)0.5(H2O)0.5]n（2）（三斜晶系，P1；a = 8.4894(5) Å，b = 13.9092(8) Å，c = 14.1596(8) Å，α = 71.1410(10)°，β = 77.3350(10)°，γ = 81.5370(10)°，Z = 4）是由L2与AgClO4在H2O/CH3OH混合溶剂体系中反应生成的，由一维链组成，这些链通过弱的非共价π-π相互作用相互连接形成二维片层。未配位的ClO4-抗衡离子和客体溶剂分子位于层间。[[Ag（L2）]NO3]n（3）是通过L2与Ag(NO3)2在MeOH/H2O混合溶剂体系中反应得到的（三斜晶系，P1；a = 8.3155(6) Å，b = 8.8521(6) Å，c = 9.8070(7) Å，α = 74.8420(10)°，β = 77.2800(10)°，γ = 68.6760(10)°，Z = 2）。在固态中，它呈现出一对与C-H...O氢键相关的有趣链结构。[[Ag（L3）]SO3CF3]n（4）是由L3和AgSO3CF3在CH2Cl2/MeOH混合溶剂体系中反应生成的，结晶于不寻常的空间群Pnnm，a = 7.9341(4) Å，b = 11.5500(5) Å，c = 18.1157(8) Å，Z = 4。它在固态中采用了一种新颖的三维结构单元，具有大的菱形通道（约15×10 Å）。
