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Related Concept Videos

Redox Reactions01:24

Redox Reactions

Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
Redox Reactions01:27

Redox Reactions

Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
Redox Titration: Other Oxidizing and Reducing Agents01:26

Redox Titration: Other Oxidizing and Reducing Agents

Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
Types of Reversible Electrodes01:24

Types of Reversible Electrodes

For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...

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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
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Light and redox switchable molecular components for molecular electronics.

Wesley R Browne1, Ben L Feringa

  • 1Centre for Systems Chemistry, Stratingh Institute for Chemistry & Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, The Netherlands. w.r.browne@rug.nl

Chimia
|December 9, 2010
PubMed
Summary
This summary is machine-generated.

Molecular electronics utilizes light-responsive molecules in devices, facing challenges at the hard-soft material interface. Diarylethene components show promise despite hurdles in molecular design and integration.

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Area of Science:

  • Molecular and organic electronics
  • Nanotechnology
  • Materials Science

Background:

  • Molecular electronics has advanced rapidly, integrating single molecules and self-assembled monolayers as light-responsive components in devices.
  • Progress has been hindered by challenges at the interface between semiconductor and molecular materials, impacting device functionality.
  • Key issues include addressability, cross-talk, molecular stability, and perturbation of photochemical properties.

Purpose of the Study:

  • To review the progress in molecular and organic electronics.
  • To highlight the challenges and advancements in interfacing molecular components with bulk metal contacts.
  • To focus on the contributions of specific research groups, particularly in employing diarylethene-based molecular components.

Main Methods:

  • Development of sophisticated methods for interfacing molecular components with bulk metal contacts.
  • Advanced molecular design and synthesis strategies to overcome stability and property perturbation issues.
  • Utilizing diarylethene-based molecular components in demonstration devices.

Main Results:

  • Demonstration devices employing single molecules and self-assembled monolayers as light-responsive components.
  • Significant advancements in molecular design and synthesis tailored for electronic applications.
  • High-level sophistication achieved in interfacing molecular systems with macroscopic electrical contacts.
  • Diarylethene-based molecular components have been successfully employed, contributing to device development.

Conclusions:

  • Despite initial challenges, molecular electronics has progressed significantly, driven by innovations in molecular design and interfacing techniques.
  • The interface between hard and soft materials remains a critical area of research, necessitating careful molecular design and integration strategies.
  • Diarylethene-based molecular components represent a promising avenue for future developments in molecular and organic electronics.