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本工作以6-羟基-2,3,9,10-二苯并-1,4,8,11,14-五氧杂-环十六-2,9-二烯(1)及其衍生物(2,3和4)为配体,在乙腈中合成了十八种新的稀土硝酸盐配合物.其中羧酸冠醚4与稀土硝酸盐[Ln(NO_3)_3]分别形成2∶1型(Ln=La,Ce,Pr,Nd)、4∶3型(Ln=Sm)和3∶4型(Ln=Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Y)配合物;冠醚1与La(NO_3)_3形成1∶1型配合物;冠醚2,3与La(NO_3)_3均形成2∶1型配合物.对所得配合物进行了元素分析、紫外光谱、红外光谱、~1H核磁共振、X射线光电子能谱等性质研究.对臂型冠醚中边臂的配位作用进行了初步讨论.
In this work, 6-hydroxy-2,3,9,10-dibenzo-1,4,8,11,14-pentaoxa- cyclohexadeca-2,9-diene (1) and its derivatives (2,3 and 4) as ligands, 18 new rare earth nitrate complexes were synthesized in acetonitrile, in which the crown ether 4 and the rare earth nitrate [Ln (NO_3) _3] formed 2: 1 (Ln = La, Ce, Pr, Nd), 4: 3 type (Ln = Sm) and 3: 4 type (Ln = Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y) The crown ethers 1 and La (NO_3) _3 form a 1: 1 complex, and the crown ethers 2 and 3 and La (NO_3) _3 all form 2: 1 complexes. The obtained complexes were characterized by elemental analysis and UV spectroscopy , Infrared spectroscopy, ~ 1H nuclear magnetic resonance, X-ray photoelectron spectroscopy and other properties of the arm-type crown ether in the side arm of the role of a preliminary discussion.