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应用6-(氢-5-四氮唑基)-2,2′-联吡啶(tbpy H)和6-(氢-5-四氮唑基)-4,4′-二甲基-2,2′-联吡啶(tmbpyH)配体,合成得到2个新的单核钆(Ⅲ)配合物[Gd(tbpy)_2(DMF)(H_2O)_2]NO_3·2H_2O(1)和[Gd(tmbpy)_2(DMF)(NO_3)]·DMF·THF(2)。X射线单晶衍射表明,每个钆(Ⅲ)离子均表现为1个畸变的三冠三角棱柱体,包含了2个四氮唑基N-H去质子化而产生的一价阴离子三齿螯合配体。此外,在2,2′-联吡啶环上引入2个甲基对钆(Ⅲ)金属中心的配位环境有显著影响,表现为2个单齿配位的水分子被1个螯合配位的硝酸根离子取代。
(Tbpy H) and 6- (hydro-5-tetrazolyl) -4,4’-dimethyl-2,5- (Gd (tbpy) _2 (DMF) (H_2O) _2] NO_3 · 2H_2O (1) and [Gd (tmbpy) ) _2 (DMF) (NO_3)] · DMF · THF (2). X-ray single crystal diffraction shows that each gadolinium (III) ion presents as a distorted triple-crown triangular prism containing two tetrazolyl NH deprotonated monovalent anion tridentate chelate complexes body. In addition, the introduction of two methyl groups on the 2,2’-bipyridyl ring has a significant effect on the coordination environment of the gadolinium (III) metal center, showing that two monodentate coordination water molecules are coordinated by one chelate Nitrate ion substitution.