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本文制备了15种稀土元素与2-乙基已基膦酸单2-乙基已基酸(EHPAEH)的固体和溶液络合物,测定了他们的FT-IR光谱和减法光谱。在固体和溶液络合物的减法光谱中,在1200cm~(-1)和990cm~(-1)附近,得到两对正峰和负峰。前一对分别对应于V_(p=0→M)和V_(p=0),后—对分别对应于V_(p-0-M)和V_(p-0-H)。 V_(p=0→M),V_(p—0—M)和远红外区的150cm~(-1)峰(V_(0=M))随镧系原子序数的变化,表现出明显的“四分组”效应。稀土元素钇(Y)的位置在Er和Tm之间。
In this paper, solid and solution complexes of 15 rare earth elements with 2-ethylhexylphosphonic acid mono-2-ethylhexyl acid (EHPAEH) were prepared and their FT-IR spectra and subtractive spectra were measured. In the subtractive spectra of solid and solution complexes, two pairs of positive and negative peaks were obtained near 1200 cm -1 and 990 cm -1. The previous pair corresponds to V_ (p = 0 → M) and V_ (p = 0), and the post-pair corresponds to V_ (p_0-M) and V_ (p_0-H), respectively. V_ (p = 0 → M), V_ (p-0-M), and the 150 cm -1 peak in the far infrared region (V_ (0 = M)) show significant “ Quartet ”effect. The position of the rare earth element yttrium (Y) is between Er and Tm.