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A Fuel-Driven Lock-and-Key System.

Shilin Zhang1, Yanan Zhu2, Hailiang Ni1

  • 1College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, P. R. China.

Chemistryopen
|June 10, 2025
PubMed
Summary
This summary is machine-generated.

This study presents a novel fuel-driven lock-and-key system. A chemical fuel enables a key molecule to bind and release from a lock, demonstrating reversible molecular recognition.

Keywords:
chemical fuelcrown etherhost‐guestlock‐and‐key

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Area of Science:

  • Supramolecular Chemistry
  • Chemical Systems Engineering

Background:

  • Molecular recognition is fundamental to chemical processes.
  • Designing controllable molecular systems requires understanding energy-driven interactions.

Purpose of the Study:

  • To introduce a simple, fuel-driven lock-and-key system.
  • To illustrate energy-driven molecular recognition using crown ether and ammonium ion interactions.

Main Methods:

  • Utilized a 15-crown-5 molecule as the lock and an amino-functionalized molecule as the key.
  • Employed 2-cyano-2-phenylpropanoic acid as a chemical fuel to control key protonation and binding.
  • Demonstrated reversible binding and dissociation cycles.

Main Results:

  • Successfully demonstrated a fuel-driven lock-and-key mechanism.
  • The system showed reversible operation for at least three cycles.
  • Protonation state changes mediated by the chemical fuel controlled the binding events.

Conclusions:

  • The developed system provides an intuitive model for energy-driven molecular recognition.
  • Offers insights for designing advanced molecular systems based on controlled recognition events.
  • Highlights the potential of chemical fuels in dynamic molecular assembly.