Surface鈭扙nhanced Polymerization via Schiff-Base Coupling at the Solid鈥揥ater Interface under pH Control

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• 作者：Marco Di Giovannantonio ; Tomasz Kosmala ; Beatrice Bonanni ; Giulia Serrano ; Nicola Zema ; Stefano Turchini ; Daniele Catone ; Klaus Wandelt ; Dario Pasini ; Giorgio Contini ; Claudio Goletti
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：August 20, 2015
• 年：2015
• 卷：119
• 期：33
• 页码：19228-19235
• 全文大小：519K
• ISSN：1932-7455

文摘

On-surface polymerization realized at the solid鈥搇iquid interface represents a promising route to obtain stable and conductive organic layers with tunable properties. We present here spectroscopic evidence of 蟺-conjugated polymer formation at the interface between an iodine-modified Au(111) and an aqueous solution. Schiff-base coupling has been used to drive the reaction by changing the pH. Scanning tunneling microscopy (STM) investigations show that the substrate acts as a template driving the formation of 1D ordered nanostructures. All the chemical states of the molecules on the surface have been identified and their evolution as a function of the pH has been monitored by synchrotron radiation X-ray photoelectron spectroscopy (XPS), demonstrating that two polymeric phases, undistinguishable by STM, exist on the surface: intermediate state and 蟺-conjugated final product. The I/Au(111) substrate enhances the formation of 蟺-conjugated polymers, as established comparing their production on the surface and in the bulk solution.