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O: Fachverband Oberflächenphysik

O 99: Organic Molecules on Inorganic Substrates VI: Adsorption, Growth and Networks

O 99.3: Hauptvortrag

Donnerstag, 19. März 2020, 11:00–11:30, GER 38

Exploration of complex interfacial networks and 2D tesselations — •Johannes V Barth — Physics Department E20, TU Munich - www.e20.ph.tum.de

A major objective in modern surface and nanoscale science relates to complex interfaces and the development of protocols for their control, both in the static and dynamic regime. Interfacial molecular engineering employing optimized assembly procedures and carefully selected molecular tectons represents a powerful tool for constructing a variety of intriguing materials. Herein we report advances towards surface-confined complex networks using different fabricaton schemes. Specifically, we realized networks and tesselations via (i) supramolecular organization of organic tectons, (ii) metal-directed assembly, notably exploiting rare-earth centers, (iii) flexible molecular units, and (iv) multi-step convergent synthesis where sequential chemical conversions of a simple organic species mediate the expression of a semiregular archimedean tiling. Our approach illustrates novel avenues to construct complex materials via specific interactions and interfacial adaptation or transformations of adsorbed molecular species. Moreover, the findings and employed methodology contributes to the general understanding of the emergence of complexity and hierarchic systems in chemistry and biology.