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Related Concept Videos

Valence Bond Theory02:42

Valence Bond Theory

10.5K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Third Law of Thermodynamics02:38

Third Law of Thermodynamics

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A pure, perfectly crystalline solid possessing no kinetic energy (that is, at a temperature of absolute zero, 0 K) may be described by a single microstate, as its purity, perfect crystallinity,and complete lack of motion means there is but one possible location for each identical atom or molecule comprising the crystal (W = 1). According to the Boltzmann equation, the entropy of this system is zero.
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Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

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Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
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Entropy02:39

Entropy

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Salt particles that have dissolved in water never spontaneously come back together in solution to reform solid particles. Moreover, a gas that has expanded in a vacuum remains dispersed and never spontaneously reassembles. The unidirectional nature of these phenomena is the result of a thermodynamic state function called entropy (S). Entropy is the measure of the extent to which the energy is dispersed throughout a system, or in other words, it is proportional to the degree of disorder of a...
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Entropy01:18

Entropy

3.3K
The first law of thermodynamics is quantitatively formulated via an equation relating the internal energy of a system, the heat exchanged by it, and the work done on it. A quantitative formulation of the second law of thermodynamics leads to defining a state function, the entropy.
When an ideal gas expands isothermally, the disorder in the gas increases. From the molecular perspective, the gas molecules have more volume to move around in.
Consider an infinitesimal step in the expansion, which...
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Metallic Solids02:37

Metallic Solids

20.2K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
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Updated: Dec 4, 2025

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

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Function from configurational degeneracy in disordered framework materials.

Emily M Reynolds1, Emma H Wolpert1, Alistair R Overy1

  • 1Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, UK. andrew.goodwin@chem.ox.ac.uk.

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|October 22, 2020
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Summary
This summary is machine-generated.

Correlated disorder in molecular frameworks enables exotic states with cooperative behavior for advanced applications. This research explores combinatorial mechanics, adaptive flexibility, and error-correcting data storage in these materials.

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Last Updated: Dec 4, 2025

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Chemistry

Background:

  • Correlated disorder in molecular frameworks can lead to unusual cooperative phenomena.
  • High-symmetry framework structures can host exotic disordered states.

Purpose of the Study:

  • To demonstrate how local-symmetry lowering approaches can create exotic disordered states in framework materials.
  • To explore the potential applications of these states in mechanical behavior, host/guest chemistry, and data storage.

Main Methods:

  • Utilizing local-symmetry lowering approaches to induce disorder.
  • Investigating cooperative phenomena in framework materials.

Main Results:

  • Ostensibly high-symmetry framework structures can harbor exotic disordered states.
  • These states exhibit strong cooperative behavior.

Conclusions:

  • The findings suggest potential applications in anomalous mechanical properties, host/guest interactions, and error-correcting data storage.
  • Framework materials with correlated disorder offer novel avenues for technological innovation.