1. ISIS/CNRS UMR 7006—Université Louis Pasteur, 8 allée Gaspard Monge, 67000 Strasbourg (France), Fax: (+33)?390245161;2. Departement of Chemistry, Humboldt‐Universit?t zu Berlin, Brook‐Taylor‐Strasse 2, 12489 Berlin (Germany), Fax: (+49)?30?2093?6940;3. ISOF—Consiglio Nazionale delle Richerche via Gobetti 101, 40129 Bologna (Italy)
Abstract:
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” to their “tetragon” forms, as reflected in dramatically altered 2D self‐assembly over large areas extending over hundreds of nanometers (see graphic).
