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Related Concept Videos

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...
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...
Electron Carriers01:24

Electron Carriers

Electron carriers can be thought of as electron shuttles. These compounds can easily accept electrons (i.e., be reduced) or lose them (i.e., be oxidized). They play an essential role in energy production because cellular respiration is contingent on the flow of electrons.
Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
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...
Energy Line and Hydraulic Gradient Line01:27

Energy Line and Hydraulic Gradient Line

Based on Bernoulli's equation, the energy line (EL) and hydraulic grade line (HGL) provide graphical representations of energy distribution in a fluid flow system. For steady, incompressible, inviscid flows, Bernoulli's equation is expressed as:
Role of Reduced Coenzymes NADH and FADH₂01:29

Role of Reduced Coenzymes NADH and FADH₂

The energy released from the breakdown of the chemical bonds within nutrients can be stored either through the reduction of electron carriers or in the bonds of adenosine triphosphate (ATP). In living systems, a small class of compounds functions as mobile electron carriers, molecules that bind to and shuttle high-energy electrons between compounds in pathways. The principal electron carriers that will be considered originate from the B vitamin group and are derivatives of nucleotides; they are...

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Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
07:55

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device

Published on: July 20, 2021

Energy transfer dyads based on Nile Red.

Jiney Jose1, Yuichiro Ueno, Juan C Castro

  • 1Department of Chemistry, Texas A & M University, Box 30012, College Station, TX 77842-3012 USA.

Tetrahedron Letters
|February 18, 2010
PubMed
Summary

Researchers developed novel energy transfer dyads for light emission between 600-700 nm. These dyads, utilizing Nile Red acceptors, demonstrated high energy transfer efficiencies, paving the way for new optical materials.

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Area of Science:

  • Organic Chemistry
  • Photochemistry
  • Materials Science

Background:

  • Energy transfer dyads are crucial for developing advanced optical and electronic materials.
  • Nile Red derivatives are known for their fluorescence properties, making them suitable acceptors.

Purpose of the Study:

  • To synthesize novel energy transfer dyads emitting in the 600-700 nm range.
  • To investigate the efficiency of energy transfer in these newly developed molecular systems.

Main Methods:

  • Synthesis of fluorescein- and BODIPY-based donor molecules.
  • Conjugation of donors to Nile Red acceptors using alkyne and triazole linkers.
  • Spectroscopic characterization of the resulting dyads (1-5).

Main Results:

  • Successful synthesis of five distinct energy transfer dyads.
  • Observed high energy transfer efficiencies ranging from 77% to 97% in organic media.
  • Emission in the desired 600-700 nm spectral region.

Conclusions:

  • The developed dyads exhibit efficient intramolecular energy transfer.
  • These dyads are promising candidates for applications requiring specific light emission properties.
  • The synthetic strategy allows for tunable optical properties through donor-acceptor modification.