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测定了邻苯二甲酰肼粉末样品在400～2800cm~(-1)范围内的激光拉曼光谱和红外光谱。比较谱图很容易看出呈现互补关系,该化合物固体状态应具有对称中心。邻苯二甲酰肼碱性溶液的表面增强拉曼谱图上出现了粉末拉曼谱上没有的1374cm~(-1)处很强的峰和其他峰。这可解释为:在固态时,邻苯二甲酰肼两个分子间通过氢键形成二聚体,属C_(2h)点群,只有g类振动表现出拉曼活性;而在溶液中,二聚体破坏掉,在荷正电银电极作用下,两个氮原子上的氢脱掉,分子通过两个氮原子吸附在电极上,呈1.4—二酚式结构,属C_(2v)点群,所有振动都是拉曼活性的,表现出很多固态样品拉曼谱上禁阻的峰。
The Raman spectra and IR spectra of phthalhydrazide powders were measured in the range of 400 ~ 2800cm -1. It is easy to see that there is a complementary relationship in the comparison spectrum, and the solid state of the compound should have a symmetry center. Surface enhanced Raman spectroscopy of the phthalhydrazide basic solution showed strong peaks at 1374 cm -1 and other peaks not found in the powder Raman spectrum. This can be explained as follows: In the solid state, the two molecules of the phthaloyl hydrazide form a dimer through hydrogen bonding, which belongs to the C_ (2h) point group, and only the g class vibration shows the Raman activity; in the solution, Dimer destroyed, the positive charge of silver electrode, the two nitrogen atoms on the hydrogen off, the molecule adsorbed on the electrode through two nitrogen atoms, was 1.4-diphenol structure, is C_ (2v) point Group, all vibrations are Raman-active and show a lot of forbidden peaks in the Raman spectra of many solid-state samples.