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近年来,具有1:1、1:2、2:1、3:2和4:3等配合比(M:L)的各种稀土冠醚配合物相继合成。据文献报道,影响配合比的主要因素是抗衡阴离子的性质。到目前为止,已研究了包括硝酸根、氯离子、溴离子、导硫氰根、高氯酸根、六氟磷酸根、三氟醋酸根等作为抗衡阴离子的稀土冠醚配合物。I~-易氧化,LnI_3不稳定,其相应配合物也容易发生分解,故以碘离子作为抗衡阴离子的稀土冠醚配合物至今未见报道。我们合成了稀土碘化物与18-冠-6的配合物,并研究了它们的性质。
In recent years, various rare earth crown ether complexes with 1: 1, 1: 2, 2: 1, 3: 2 and 4: 3 ratio (M: L) It has been reported in the literature that the main factor affecting the mixing ratio is the nature of counter-anions. So far, rare earth crown ether complexes including nitrate, chloride, bromide, thiocyanate, perchlorate, hexafluorophosphate, trifluoroacetate and the like as counter anions have been studied. I ~ - easily oxidized, LnI_3 instability, its corresponding complex is also prone to decomposition, so iodide ion countercurrent anion rare earth crown ether complex has not been reported. We synthesized the complexes of rare earth iodides with 18-crown-6 and investigated their properties.