The Raman spectrum of copper formate tetrahydrate
The Raman spectrum of copper formate tetrahydrate
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四水甲酸铜的拉曼光谱
DOI：
10.1088/0022-3719/6/3/020
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发表时间：
1973
期刊：
影响因子：
--
通讯作者：
F. Ninio
中科院分区：
文献类型：
--
作者：
R. P. Canterford;F. Ninio
在90 ~ 250 K温度范围内，测定了四水甲酸铜Cu（COOH）_2·4H_2O在3500 ~ 79 cm ~（-1）的拉曼光谱。几条线被发现消失，而突然作为反铁电转变温度235.5 K的交叉。通过与氘化物Cu（COOH）2.4D2O在90 K时的光谱比较，确定了其中一些谱线为旋光和旋光水模。这与晶体学和其他证据一致，即水分子的有序化发生在相变。虽然大多数内部模式没有显着变化，从90至250 K，在3092 cm-1的水的对称拉伸模式略有加宽，并在峰值强度明显下降。
The Raman spectrum of copper formate tetrahydrate Cu(COOH)2.4H2O, has been determined in the range 3500 to 79 cm-1 from 90 to 250 K. Several lines are found to disappear rather abruptly as the antiferroelectric transition temperature 235.5 K is crossed. By comparison with the spectrum of the deuterate, Cu(COOH)2.4D2O, at 90 K, some of these lines are identified as translatory and rotatory water modes. This agrees with crystallographic and other evidence that ordering of the water molecules occurs at the phase transition. Although most internal modes do not change significantly from 90 to 250 K, the symmetric stretching mode of water at 3092 cm-1 broadens slightly and decreases appreciably in peak intensity.