一种超分子金属有机凝胶对甲基橙染料分子的吸附性能研究

以双羧酸功能化的苯并咪唑内鎓盐(L17)和硝酸银为原料制备了超分子金属有机凝胶,研究了该凝胶对罗丹明B、孔雀石绿及甲基橙的吸附性能,实验结果表明在水相中该凝胶可以选择性地吸附甲基橙分子。同时,考察了干凝胶用量、吸附时间、凝胶因子与金属离子配比及pH值等因素对吸附性能的影响,发现干凝胶用量为5mg、吸附时间在40～60min、最佳配比为1∶1、体系pH值为5～11时体现出最佳的吸附能力。该干凝胶对甲基橙的吸附行为符合Lang-muir及Freundlich等温吸附式,从动力学角度分析该吸附行为受液膜扩散控制。

Synthesis and Crystal Structure of an Infinite 1D Zigzag Chain Compound (dimbH^+)(ClO_4^-) and Its Comparison with (dimb)2H_2O (dimb = 1,3-Di(imidazol-1-ylmethyl)-5-methylbenzene)

A new imidazolium compound, C15H17N4ClO4, was prepared from a flexible bidentate ligand of 1,3-di(imidazol-1-ylmethyl)-5-methylbenzene, and characterized by X-ray analysis. It is of orthorhombic, space group Pnma with a = 8.182(2), b = 12.874(3), c = 15.611(4) ? V = 1644.4(7) 3, Dc = 1.425 g/cm3, Z = 4, Mr = 352.78, m(MoKa) = 0.944 mm-1, F(000) = 736, S = 1.036, the final R = 0.0521 and wR = 0.1187 for 1128 observed reflections (I > 2s(I)). An infinite one-dimensional zigzag chain is formed by NH…N hydrogen bonding interactions between the imidazolium salt cations.