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Related Concept Videos

Potential Energy00:52

Potential Energy

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The energy stored by a structure and location of matter in space is called potential energy. For instance, raising a kettlebell changes its spatial location and increases its potential energy. Similarly, a stretched rubber band contains potential energy which, under certain conditions, can be converted into other forms of energy, such as kinetic energy.
Chemical bonds that form attractive forces between atoms also contain potential energy, called chemical energy. When a chemical reaction...
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The word "gas" comes from the Flemish word meaning "chaos," first used to describe vapors by the chemist J. B. van Helmont. Consider a container filled with gas, with a continuous and random motion of molecules. During collisions, the velocity component parallel to the wall is unchanged, and the component perpendicular to the wall reverses direction but does not change in magnitude. If the molecule’s velocity changes in the x-direction, then its momentum is changed.
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Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels.  Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
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Free-energy diagrams, or reaction coordinate diagrams, are graphs showing the energy changes that occur during a chemical reaction. The reaction coordinate represented on the horizontal axis shows how far the reaction has progressed structurally. Positions along the x-axis close to the reactants have structures resembling the reactants, while positions close to the products resemble the products.  Peaks on the energy diagram represent stable structures with measurable lifetimes, while...
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The formation of a solution is an example of a spontaneous process, which is a process that occurs under specified conditions without energy from some external source.
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The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
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Related Experiment Video

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Synthesis and Characterization of Supramolecular Colloids
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Supramolecular Energy Materials.

Oliver Dumele1, Jiahao Chen2, James V Passarelli2

  • 1Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA.

Advanced Materials (Deerfield Beach, Fla.)
|March 13, 2020
PubMed
Summary

Self-assembly, inspired by nature, creates advanced materials for clean energy. This research explores using molecular self-assembly for efficient solar energy conversion, fuel generation, and energy storage solutions.

Keywords:
energy materialsphotocatalysisself-assemblysolar cellssupramolecular chemistry

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Area of Science:

  • Supramolecular chemistry and materials science focused on renewable energy applications.

Background:

  • Nature utilizes self-assembly, like in plant light-harvesting systems, for efficient energy conversion.
  • Self-assembly in artificial systems mimics natural processes for enhanced energy technologies.

Purpose of the Study:

  • To explore the design of supramolecular energy materials for renewable and clean energy.
  • To optimize photocatalysis, photovoltaics, and energy storage through molecular self-assembly.
  • To generate fuels and chemicals using light-harvesting assemblies and catalysts.

Main Methods:

  • Utilizing noncovalent interactions for molecular self-assembly.
  • Designing soft materials with light-harvesting assemblies and catalysts.
  • Integrating organic and inorganic structures via templating and electrodeposition.
  • Synthesizing hybrid perovskites with organic molecule modification.

Main Results:

  • Self-assembled structures can maximize charge transport and minimize exciton recombination in photovoltaics.
  • Templating and electrodeposition enable the creation of photoconductors and supercapacitors.
  • Hybrid perovskites show tunable properties for photovoltaics and light emission.

Conclusions:

  • Self-assembly is a powerful strategy for developing efficient supramolecular energy materials.
  • Tailoring molecular interactions is key to optimizing energy conversion and storage.
  • Hybrid perovskites offer a versatile platform for advanced energy devices.