稀土冠醚配合物的研究 XV.稀土硝酸盐与臂型冠醚配合物的合成和性质研究

Studies on Rare Earth Coordination Compounds with Crown Ether ⅩⅤ. Syntheses and Properties of the Coordination Compounds of the Rare Earth Nitrates with Side-Armed Crown Ether

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.

Side-armed crown ethers 1—4 (Chinese Text) and their rare earth coordination compounds [La (NO_3)_3·1·5H_2O, 2La (NO_3)_3·2·CH_3CN·2H_2O; 2La (NO_3)_3·3·2CH_3CN·H_2O; 2Ln(NO_3)_3·4·2CH_3CN·nH_2O(Ln=La—Nd, n=1, 2); 4Sm(NO_3)_3·34·3CH_3CN·H_2O and 3Ln(NO_3)_3·44·CH_3CN·3H_2O(Ln=Eu—Lu, Y)] have been synthesized. These compounds have been characterized through elemental analysis, UV, IR, ~1HNMR and XPS.