Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 46: Organic molecules on inorganic substrates: electronic, optical and other properties – Poster

O 46.10: Poster

Dienstag, 10. März 2026, 14:00–16:00, P2

Tip-induced hysteretic switching in copper-coordinated bipyridine (BIPY) thin films — •Sunny M P Gautam, Ankita Jaiswal, Thiruvancheril G Gopakumar, and Sandeep Verma — Indian Institute of Technology, Kanpur, India

In this work, we present a rationally designed hypoxanthine-based ligand, 1,9-bis(pyridine-2-ylmethyl) hypoxanthine (BIPY), specifically tailored for constructing functional surface-confined metal-organic networks (SMONs). The ligand integrates a π-conjugated purine core with flexible pyridyl donor arms, creating a nitrogen-rich, tridentate coordination environment ideal for forming robust 2D frameworks. Its conformational adaptability around metal centers enables dynamic metal*ligand interactions, offering a pathway toward SMON-based molecular switching driven by electronic-state transitions rather than geometric changes. Such electronically mediated bistability provides enhanced stability and potentially faster switching compared to conventional conformational molecular switches. Our results highlight BIPY as a promising platform for developing adaptive, switchable SMON architectures with potential applications in sensing, spintronics, data storage, and molecular logic systems.

Keywords: Surface-confined metal–organic networks (SMONs); 2D molecular materials; Tip Induced switching; Atomic Force Microscopy; Switchable thin-film devices