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赖氨酸-Ag反应机理的研究 总被引:5,自引:0,他引:5
The interaction of silver(Ⅰ) ion with lysine has been investigated by UV-Vis, fluorescent spectra and electrophoresis method. The effect of pH medium and multicomponent concentration on interaction of lysine-silver has also been studied. Lysine-silver system showed maximum absorbance at 239 nm and 448 nm. Lysine showed fluorescence. The fluorescence excitation wavelength was about 356.6 nm (fluorescence emission wavelength was about 438.6 nm). When the reaction of silver(Ⅰ) ion with lysine happened, fluorescence was quenching. Lysine-silver system carried negative charge, and the electrokinetic potential of double electrode layer was -2.35×10-4 V. 相似文献
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氨基酸与银的反应是一个不借外加能量热力学上即可进行的过程,但当引入光之后,可改变反应速率.研究发现:Soret带出现吸收所需光照度的大小顺序为Asp Ag(I)>Thr Ag(I)>Tyr Ag(I)>Lys Ag(I),对于Cys Ag(I)体系,Cys的α羧基氧、α氨基的氮与银(I)结合时光照有利于反应的进行,而S原子与银(I)结合与光照度几无关系.此反应是光助化学反应. 相似文献
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