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Related Concept Videos

Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes a mild...
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes a mild...
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
Catalysis02:50

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.

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Related Experiment Video

Updated: May 17, 2026

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging
08:40

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging

Published on: March 13, 2019

A catalytically driven organometallic molecular motor.

Ryan A Pavlick1, Krishna K Dey, Andrew Sirjoosingh

  • 1Department of Chemistry, Pennsylvania State University, University Park, PA 16802, USA. asen@psu.edu.

Nanoscale
|October 27, 2012
PubMed
Summary

Ruthenium-based Grubbs

Area of Science:

  • Catalysis
  • Supramolecular Chemistry
  • Nanotechnology

Background:

  • Ring-closing metathesis is a crucial reaction in organic synthesis.
  • Molecular motors are nanoscale machines that perform mechanical work.
  • Understanding catalyst dynamics is key to controlling chemical reactions.

Purpose of the Study:

  • To investigate the diffusive motion of a Grubbs' catalyst during ring-closing metathesis.
  • To determine if catalytic activity influences molecular movement.
  • To characterize a novel single-molecule motor.

Main Methods:

  • Nuclear Magnetic Resonance (NMR) spectroscopy was employed to monitor catalyst diffusion.
  • Ring-closing metathesis reactions were performed at varying substrate concentrations.

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Preparation and 3D Tracking of Catalytic Swimming Devices

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Last Updated: May 17, 2026

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging
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Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
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Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

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  • Analysis of NMR data provided insights into molecular dynamics.

    • Main Results:

    • The diffusive movement of the ruthenium-based Grubbs' catalyst was observed to increase.
    • This increase in motion directly correlated with substrate concentration during the reaction.
    • The catalyst demonstrated catalytically driven motion, functioning as a small molecular motor.

    Conclusions:

    • Catalytic activity in ring-closing metathesis can induce and modulate molecular motion.
    • This study presents one of the smallest known single-molecule motors driven by catalysis.
    • The findings open avenues for designing responsive nanomaterials and catalytic systems.