Modulating Large-Area Self-Assembly at the Solid-Liquid Interface by pH-Mediated Conformational Switching
作者:Luc Piot、Robert M. Meudtner、Tamer El Malah、Stefan Hecht、Paolo Samorì
DOI:10.1002/chem.200802566
日期:2009.5.4
Dynamic surfaces: The conformational transition of 2,6‐bis(1‐aryl‐1,2,3‐triazol‐4‐yl)pyridine (BTP) derivatives, triggered by a change in pH, has been observed with a sub‐nm resolution by STM at the solid–liquid interface. Upon addition of trifluoroacetic acid two different BTP molecules, each forming a highly ordered physisorbed monolayer, underwent significant conformational changes from their “rosette”
动态表面:在亚纳米级观察到了由pH值变化引发的2,6-双(1-芳基-1,2,3-三唑-4-基)吡啶(BTP)衍生物的构象转变固-液界面处的STM分辨率。加入三氟乙酸后,两个不同的BTP分子(各自形成一个高度有序的物理吸附单层)经历了从其“玫瑰红”到“四方”形式的显着构象变化,这反映在大面积超过数百个区域的2D自组装急剧变化纳米(见图)。