氨基葡萄糖及羧甲基氨基葡萄糖与铁(Ⅱ)、锌(Ⅱ)、钴(Ⅱ)、铜(Ⅱ)配合物的光谱特征

本文研究了氨基葡萄糖及羧甲基氨基葡萄糖分别与铁（Ⅱ）、锌（Ⅱ）、钴（Ⅱ）、铜（Ⅱ）形成配合物的UV，IR和^1H-NMR光谱特征。配合物紫外的λmax发生了明显紫移；在IR谱中，配合物的面外振动峰655cm^-1较未配位的氨基葡萄糖中的面外振动峰670cm^-1低，且在990cm^-1附近出现新的吸收峰；在^1H-NMR谱中，配合物C3上羟基中的质子化学位移较未配位的均移向高场，氨基上质子的化学位移较未配位的也移向高场，其他碳上羟基中的质子化学位移值不变，从而初步证实了配合物中的氨－金属（N－M）键的形成。本文还研究了羧甲基氨基葡萄糖及其与铁（Ⅱ）、钴（Ⅱ）、铜（Ⅱ）配合物的合成。其配合物的IR谱线较未配位的IR谱线并没增多，指出这种反常现象是糖环的刚性所致。它们的IR和UV光谱均证实了分子中不存在游离的羰基峰，并证实了它们分子中内盐的存在，配合物的IR谱中出现新的一组吸收峰：433.1和408.9cm^-1(O-Fe)，507．1和495．0cm^-1（O－Co),403.1和389.0cm^-1(O-Cu)，证实了配合物中的氧－金属键（O－M）的形成。

Spectra Characteristics of the Complexes of Glucosamine and Carboxymethyl Glucosamine with Ferrum(Ⅱ), Zinc(Ⅱ), Cobalt(Ⅱ) and Copper(Ⅱ)

This article investigated UV, IR and 1H-NMR spectra characteristics of the complexes which are formed by glucosamine and Fe (II), Zn (II), Co (II), Cu (II) respectively. The UV's lambda max of the complexes makes obvious violet shift when compared with that of the glucosamine. In IR spectra of the complexes, out-of-plane vibration peak 655 cm-1 of the amino group is lower than that of the glucosamine which is 670 cm-1, and there is also the new absorption peak near 990 cm-1. As for 1H-NMR, the C3 hydroxy proton and the amino proton of the complexes absorb highfield when compared with that of glucosamine, while the shifts of the hydroxy proton on other carbon atoms remain unchanged or almost unchanged, so the formation of the nitrogen-metal bond is primarily proved. This article also researched the syntheses of the complexes of the carboxymethyl glucosamine with Fe (II), Co (II), Cu (II) and pointed out that it is the rigidity of the sugar ring that leads to an abnormal phenomenon that the spectral lines' number of the complexes is the same as that of the carboxymethyl glucosamine. Their IR and UV spectra all indicate that there is no peak of the free carbonyl group in the molecule and prove the existence of inner salt. In the complexes' IR spectra, the formation of the oxygen-metal bond accounts for the appearance of a series of new absorption peaks: 433.1 and 408.9 cm-1 (O-Fe), 507.1 and 495 cm-1 (O-Co), 403.1 and 389 cm-1 (O-Cu).