镀锌层表面硫代酰胺化合物彩色配合物的XPS和AES研究

CH3CSNH2、H2NCSCSNH2、H2NCSNHNH2等硫代酰胺化合物在锌镀层表面发生配位化学反应,获得了多种不溶性彩色配合物膜,膜层有良好的装饰性能。XPS和AES分析结果表明,多数硫代酰胺化合物分子中的硫代酰胺基团在参与配位反应时发生了去质子化,N、S均发生了配位,另有部分硫代酰胺基团未去质子化,直接与Zn2 配位。从其AES深度剥蚀曲线的组成恒定区求得了膜层的厚度。

XPS and AES Studies on the Colored Coordination Compound Films of Several Thiourea Derivatives on Zinc Plate Surface

By means of the interface reactions of CH3CSNH2?H2NCSCSNH2?H2NCSNH NH2 on zinc plate surface, Insoluble coordination compound films are formed with a metallic luster of various colours changing in accordance with the reaction t ime. The films are functional finishing layers, not only possessing decorative p roperties, but improving the brightness and cleanliness of the metal surface. Tr eatment of the zinc plate or zinc oxide substrate with the thioamide compounds r esults in colored surface films. Because of the interface reactions caused by th ioamide compounds, they are comparable with each other in reactivity. During the interface reaction, the deprotonated and undeprotonated thioamide behave differ ently. The compositions and structre of the surface films have been determined o r postulated based on XPS and AES measurement. The data show conclusively that t hioamide compound layers on zinc plate are responsible for the color of the film s.