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瓜环是一类由亚甲基桥联苷脲单元形成的新型笼状大环化合物,环绕在其端口极性较强的羰基形成了阳离子键和位点,可以通过离子-偶极相互作用和与脲羰基的氢键作用来键合金属离子,这类化合物在环境、医药及材料等领域具有广阔的应用前景。本文设计并合成了一个五员瓜环(Q[5])桥联K~+和Gd~(3+)形成的新型一维配位聚合物{KGd(H_2O)_3Q[5]}_n-(ClO_4)_(3n)Cl_n·7nH_2O。利用单晶X射线衍射进行结构测定,结果表明:配合物中Q[5]起着一个双五齿配体的作用,每个端口的5个羰基氧原子分别和钾离子和钆离子配位,Q[5]空腔内包结一个氯离子,和钆离子配位水分子同时和K~(+i)(i=x,y-1,z)配位,化合物本身形成沿b轴延伸的一维配位聚合物。
Cucurbituril is a new type of cage macrocyclic compound formed by methylene bridged glycosidic urea units. Cationic rings and sites are formed around the carbonyl groups at the polar terminals of the guaiacol ring and can be separated by ion-dipole interaction and And urea carbonyl hydrogen bonding role of bonding metal ions, these compounds in the environment, medicine and materials and other fields has broad application prospects. In this paper, a new one-dimensional coordination polymer {KGd (H_2O) _3Q [5]} _ n- (5) was synthesized and characterized by bridging K ~ + and Gd ~ ClO_4) _ (3n) Cl_n · 7nH_2O. The structure of the complex was characterized by single crystal X-ray diffraction. The results show that Q [5] plays a role of a double-pentagonal ligand. The five carbonyl oxygen atoms of each port are coordinated with potassium ions and gadolinium ions respectively. In the Q [5] cavity, a chloride ion is contained in the cavity, which coordinates with the water molecule of gadolinium ion and k + (i = x, y-1, z) Dimension coordination polymer.