双吡啶酰腙Schiff碱HgⅡ/Cd(Ⅱ)配合物的合成及其对甲醇蒸气的吸附

合成了双吡啶酰腙Schiff碱配体(L),并采用核磁共振氢谱、质谱、红外光谱和元素分析等手段对其结构进行了表征。进一步采用溶剂挥发法合成了2个配合物{[Cd(L)_2Cl_2]·2DMF·6H_2O}n (1)和[Hg(L)Cl_2]n (2)。通过X射线单晶衍射技术测定了配体及2个配合物的单晶结构,并对配合物的热稳定性及其在常温下对甲醇蒸气的吸附进行了考察。实验结果表明,2个配合物均为1D配位聚合物,配合物1对甲醇蒸气有较好的吸附能力。     

Synthesis,Crystal Structure and Anion Recognition Property of a Flexible Urea-functionalized Receptor

A flexible urea-functionalized receptor bearing two p-nitrobenzene units was designed and synthesized from the reaction of precursors 4-nitrophenyl isocyanate and 1,2-bis(2?-aminophenoxy) benzene. The receptor was characterized by ~1 H NMR, MS, FTIR and elemental analysis, and the crystal structure of the receptor was determined by X-ray diffraction analysis. The crystal belongs to the orthorhombic system, space group Pca21 with a = 12.740(2), b =14.133(3), c = 15.842(3) ?, V = 2852.4(9) ?~3, Z = 4, M_r = 620.57, D_c = 1.445 g/cm~3, F(000) = 1288,= 0.0585 and wR = 0.1032 for 3177 observed reflections(Ⅰ 2σ(Ⅰ)), and R = 0.1304 and wR =for all data. The results show that the receptor displays selective recognition ability for H_2PO_4~– in DMSO with a series of anions using UV-Vis absorption spectra technique. Furthermore, the coordination reaction of the receptor with H_2PO_4~– was investigated via UV-Vis spectra and ~1 H NMR.The stoichiometric ratio and the association constant(Ka) of the coordination reaction were obtained as well.