Achieving Multiple Quantum-Interfered States via Through-Space and Through-Bond Synergistic Effect in Foldamer-Based...

Area of Science:

• Molecular electronics
• Quantum chemistry
• Organic electronics

Background:

• Molecular electronics offers broad applications by utilizing molecular diversity.
• Understanding charge transport in molecules with secondary structures is key for developing advanced electronic devices.
• Multivalued logic circuits require precise control over quantum-interfered states.

Purpose of the Study:

• To elucidate the synergistic effects of through-space and through-bond conducting pathways in foldamers.
• To demonstrate the regulation of charge transport through modulation of these pathways.
• To provide a foundation for constructing multivalued logic circuits at the molecular level.

Main Methods:

• Synthesis of foldamers derived from ortho-pentaphenylene.
• Modulation of through-space and through-bond conducting pathways.
• Analysis of quantum interference phenomena (constructive and destructive) in charge transport.

Main Results:

• Foldamer stacking and heterocycle size influence through-space quantum interference (constructive to destructive).
• Alteration of heterocycle connection sites enhances through-bond conjugation, suppressing through-space pathways.
• Four distinct quantum-interfered states were generated by combining pathway modulations.

Conclusions:

• Synergistic effects between through-space and through-bond pathways can be precisely controlled in foldamers.
• This control allows for the generation of multiple quantum-interfered states.
• The findings offer a proof of concept for constructing molecular multivalued logic circuits.