NTO及其铷盐水溶液光谱研究

Study on the Spectra of NTO and Its Rubidium Salt in Aqueous Solution

用Raman光谱和FTIR光谱对NTO晶体和不同pH值的水溶液以及配合物Rb(NTO)·H2O的水溶液进行了研究。从已测定的单晶结构表明金属离子与NTO-的CNO,CO基团和水分子中的氮、氧原子键合。Raman和FTIR光谱特征的主强峰也表明是在NTO-的CNO2和CO基团的氧和氮原子与金属离子形成弱配位键。该配合物饱和水溶液的振动光谱峰与晶体的振动光谱峰基本上吻合。表明该配合物在水中键合未发生变化,因而NTO的碱金属配合物在水溶液中的振动光谱峰归属可以用晶体中键的形成来说明。讨论了金属离子与NTO必需在碱性水中才能形成NTO的金属配合物机理。

In this paper, the Raman and difference FTIR spectra of NTO crystal, NTO solutions at different pH and saturated aqueous solution of Rb(NTO) center dot H2O have been studied. The determined structure of crystal suggests that the metal ion with oxygen and nitrogen atoms of [GRAPHICS] and H2O formed bonds. The highest characterization peaks of Raman and nitrogen atoms of [GRAPHICS] of NTO- formed week coordination bonds. The vibration spectra of saturation solution basically accord with those of the crystal. The bonds of saturation solution of the. coordination compound have not changed. Therefore, the different vibration spectra of the saturation water solution of Rb (NTO) center dot H2O can be explicated by the formation of the bonds in crystal. The coordination compound formation mechanism of metal ion with NTO in alkali aqueous solution is discussed.