INFRARED STUDY ON THE HYDRATION OF MN2+, FE2+, CO2+, LA3+, ND3+, DY3+, AND YB3+ IONS IN DILUTE AQUEOUS-SOLUTION
INFRARED STUDY ON THE HYDRATION OF MN2+, FE2+, CO2+, LA3+, ND3+, DY3+, AND YB3+ IONS IN DILUTE AQUEOUS-SOLUTION
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DOI：
10.1021/ic00034a040
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发表时间：
1992-04-15
影响因子：
4.6
通讯作者：
LINDGREN, J
中科院分区：
文献类型：
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作者：
BERGSTROM, PA;LINDGREN, J
利用红外光谱法获得了Mn2+、Fe2+、Co2+、La3+、Nd3+、Dy3+和Yb3+高氯酸盐在稀释（0.2 ~ 0.4 M）水溶液中的OD拉伸振动谱。报道了水合阳离子带的强度、带宽和峰位置。目前所研究的第一排过渡金属离子对配位水（HDO）分子都有类似的作用，并在2427 (2)cm-1处产生OD拉伸振动带。高氯酸镧三价溶液的光谱与阳离子扰动HDO分子的OD谱带相似。这意味着镧系离子只干扰最邻近的水分子，从而构成初级水合壳，其程度与二价阳离子相似。得到的镧系离子水化数分别为：7.8 (6)（La）、8.0 (6)（Nd）、8.7 (6)（Dy）和8.8 (6)（Yb）。
OD stretching vibration spectra of Mn2+, Fe2+, Co2+, La3+, Nd3+, Dy3+, and Yb3+ perchlorates in dilute (0.2-0.4 M) aqueous solution were obtained using infrared spectroscopy. Intensities, bandwidths, and peak positions of the hydrated cation bands are reported. The currently studied first-row transition-metal ions all have a similar effect on the coordinated water (HDO) molecules and give rise to OD stretching vibration bands at 2427 (2) cm-1. Qualitatively similar spectra were obtained for the trivalent lanthanide perchlorate solutions, with a single OD band from cation-perturbed HDO molecules. This implies that the lanthanide ions only perturb the nearest-neighboring water molecules, which thus constitute the primary hydration shell, and to a similar extent as do the divalent cations. The obtained hydration numbers for the lanthanide ions are 7.8 (6) (La), 8.0 (6) (Nd), 8.7 (6) (Dy), and 8.8 (6) (Yb).