Robust Single-Supermolecule Switches Operating in Response to Two Different Noncovalent Interactions.
Ping Zhou1,2, Yanjun Fu1,2, Maolin Wang1,2
1Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310027, China.
Journal of the American Chemical Society
|August 17, 2023
Summary
Researchers developed robust single-molecule electronic switches using pyridine derivatives. These switches utilize noncovalent [π···π] and hydrogen-bonding interactions for controllable ON/OFF functions in molecular assemblies.
Area of Science:
- Supramolecular chemistry and molecular electronics.
- Utilizing noncovalent interactions for device fabrication.
Background:
- Supramolecular electronics leverage noncovalent interactions like [π···π] and hydrogen bonding.
- Controllable switching functions in molecular assemblies are crucial for advanced electronics.
Purpose of the Study:
- To demonstrate a strategy for building electronically robust switches using pyridine derivatives.
- To harness distinct noncovalent interactions for reproducible device switching.
Main Methods:
- Employing two different noncovalent interactions ([π···π] and hydrogen bonding) between pyridine derivatives.
- Modulating a single-molecule junction with Ångström precision to control switching.
Main Results:
- Achieved a single-supermolecule switch with high ON/OFF ratios (∼600).
- Demonstrated robust and reproducible switching at frequencies up to 190 Hz.
- Switch ON state dominated by [π···π] interactions; OFF state by hydrogen-bonded dimers.
Conclusions:
- Developed robust bistable mechanoresponsive devices based on supramolecular principles.
- Opens avenues for designing integrated circuits for microelectromechanical systems (MEMS).
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