在水-吡啶混合体系中,以5-羟基-1,3-苯二甲酸(简作HO-H2BDC)、1,2-二(4-吡啶)乙烷(简作bpe)为配体与Co(NO3)2·6H2O反应,培养出[Co2(HO-BDC)2(bpe)2(H2O)2]n·n(PY)·nH2O(py=pyridine)的紫色单晶,该晶体属三斜晶系,P1空间群,晶胞参数口=1.0245(3)nm,b=1.1467(3)nm,c=1.2430(4)nm,α=68.915(5)°,β=67.163(4)°,γ=71.373(4)°,V=1.2279(6)nm^3,Z=1,Mr=979.70,Dc=1.325Mg/m^3,F(000)=506,μ=0.740mm^-1,R1=0.0515,ωR2=0.1058.该配位聚合物中在ac平面上具有规则平行四边形纳米尺寸的孔,其孔径大小约为1.025nm×1.354nm,而且通过氢键相互作用连成具有双层结构的2D网络结构、TGA曲线表明,配位聚合物的失重发生在110~150℃之间,总失重约为80.1%,最终产物为CO2O3。
A novel coordination ploymer [Co2(HO-BDC)2(bpe)2(H20)2]n·n(py)·nH20[where HO-H2BDC is 5-hydroxyisophthalic acid and bpe is 1,2-bis(4-pyridyl) ethane, py is pyridine] with nanoscale channels was synthesized and characterized via elemental analysis, IR spectra and single-crystal X-ray diffrac-tion. The crystal belongs to triclinic crystal system, space group P]-, with a=1.0245(3)nm, b=1.1467(3)nm, c=1.2430(4)nm, α=68.915(5)°,β=67.163(4)°,γ=71.373(4), V= 1.2279(6)nm^3, Z= 1, Mr=979.70, Dc=1.325 Mg·m^-3, F(000)=506, μ=0.740mm^-1, the final R1=0.0515 and ωR2=0.1058 for 3625 observed reflections with I〉2σ(I). The coordination polymer has a 2D rectangular grid framework parallel to the ac plane with a dimension of 1.025nm×0.1354 nm via strong hydrogen-bonding in-teractions. TGA curves of the coordination polymer show three main weight losses in the range of 110~150℃, 200~300℃ and 320~450℃ corresponding to the removal of non-coordinatated water molecules, non-coordinatated py molecules and the water and bpe molecules attached to metal, respectively, and the final res-idue is identified to be CO2O3.