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Relating Angular And Linear Quantities - II01:05

Relating Angular And Linear Quantities - II

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Rotational Motion about a Fixed Axis01:26

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Related Experiment Video

Updated: Jul 13, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Unidirectional rotary motion in a molecular system.

T R Kelly1, H De Silva, R A Silva

  • 1Department of Chemistry, E. F. Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA. ross.kelly@bc.edu

Nature
|September 18, 1999
PubMed
Summary

Researchers developed a novel molecule that converts chemical energy into unidirectional intramolecular rotary motion. This breakthrough in molecular motors utilizes thermal energy and a reversible tether to control movement, offering insights into biological and synthetic systems.

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Area of Science:

  • Molecular biology
  • Nanotechnology
  • Biophysics

Background:

  • Energy conversion to controlled motion is crucial for biological and artificial systems.
  • Molecular mechanisms of biological motors remain poorly understood.
  • Channelling thermal energy into directed motion at the molecular level is an open challenge.

Purpose of the Study:

  • To design and demonstrate a molecule capable of unidirectional intramolecular rotary motion.
  • To investigate methods for controlling thermally activated molecular processes.
  • To explore principles applicable to biological and synthetic molecular motors.

Main Methods:

  • Activation and biasing of a thermally induced isomerization reaction using chemical energy.
  • Creation of a molecule with a three-bladed subunit capable of 120-degree rotation.
  • Reversible tethering to favor specific rotational directions.

Main Results:

  • Demonstrated a molecule that achieves unidirectional intramolecular rotary motion.
  • Successfully controlled the directionality of rotation using a reversible tether.
  • The system utilizes chemical energy to bias a thermally induced reaction.

Conclusions:

  • The developed molecule provides a proof-of-concept for controlled molecular rotation.
  • Design principles may inform the understanding of biological and synthetic molecular motors.
  • Further development could lead to more efficient and continuous molecular motion.