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报道了乙腈介质中金属有机配合物[(dptap Ag)2](NO3)2(其中dptap为2 (2 吡啶亚氨基) 2H 1,2,4 噻二唑并[2,3 a]吡啶,2 (2 pyridylimino) 2H 1,2,4 thia diazolo[2,3 a]pyridine)在Au(111)表面诱导离解并形成有序银原子层的研究.STM结果显示,经在上述配合物的乙腈溶液中浸泡后,Au(111)表面形成(4×4)的吸附结构,此结构与Ag在Au(111)上较高欠电位下沉积所得到的结果类似.XPS结果证实所形成的吸附层中仅含有银原子.进一步用电动势法测定了[(dptap Ag)2](NO3)2的解离常数,并推测有序银原子层系与金表面相互作用从而诱导配合物的离解及Ag+的还原而形成.量子化学的计算结果与上述实验事实相符.这一表面诱导解离有望拓展至其他合适的有机金属配合物体系,从而发展为一种溶液法制备有序金属吸附层的通用方法.
Reported that the metal-organic complex [(dptap Ag) 2] (NO3) 2 (where dptap is 2 (2pyridylimino) 2H1,2,4 thiadiazolo [2,3a] pyridine, 2 (2 pyridylimino) 2H 1,2,4-diazolo [2,3 a] pyridine induced Au (111) surface induced dissociation and the formation of ordered silver atomic layer.STM results show that the above complex in acetonitrile solution (4 × 4) adsorbed on the surface of Au (111), which is similar to the result of Ag deposited on the underpotential of Au (111) .The results of XPS confirmed that in the formed adsorbed layer Only contains silver atom.The dissociation constant of [(dptap Ag) 2] (NO3) 2 was further determined by electromotive force method, and it was speculated that the ordered silver atomic layer interacted with the gold surface to induce the dissociation of the complex and the reduction of Ag + The results of quantum chemistry are consistent with the above experimental facts.The surface induced dissociation is expected to be extended to other suitable organometallic complex systems and a general method for the preparation of ordered metal adsorbed layers by solution method is developed.