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Related Concept Videos

Coordination Number and Geometry02:57

Coordination Number and Geometry

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For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
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Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

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The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
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Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

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In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
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Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Electro-mechanical Systems01:19

Electro-mechanical Systems

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Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
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Equations of Motion: Rectangular Coordinates and Cylindrical Coordinates01:21

Equations of Motion: Rectangular Coordinates and Cylindrical Coordinates

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Understanding the motion of particles is a fundamental aspect of classical mechanics, and the choice of the coordinate system plays a pivotal role in unraveling the complexities of their dynamics.
When a particle moves relative to an inertial frame, the equations of motion can be expressed using rectangular components. If the motion is confined to the x-y plane, the equations having the x and y coordinates only can be used to simplify the mathematical representation.
However, when particles...
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Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
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A switchable iron-based coordination polymer toward reversible acetonitrile electro-optical readout.

Esther Resines-Urien1, Enrique Burzurí1, Estefania Fernandez-Bartolome1

  • 1IMDEA Nanociencia , C/Faraday 9, Campus de Cantoblanco , Madrid , 28049 , Spain . Email: enrique.burzuri@imdea.org ;

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A novel iron-based coordination polymer acts as a host for acetonitrile, enabling reversible optical and electronic detection. This material offers a low-cost solution for sensing volatile organic compounds.

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Area of Science:

  • Materials Science
  • Chemistry
  • Environmental Science

Background:

  • Harmful volatile organic compounds (VOCs) pose health and environmental risks, necessitating efficient detection methods.
  • Porous coordination polymers show promise as molecular sensing materials due to their responsiveness to stimuli.
  • Conventional sensors have limitations, creating a need for complementary detection technologies.

Purpose of the Study:

  • To develop a cost-effective and efficient sensor for detecting volatile organic compounds.
  • To investigate a non-porous crystalline 1D Fe(ii) coordination polymer as a potential sensing material.
  • To explore the reversible sensing capabilities of the material for acetonitrile vapor.

Main Methods:

  • Synthesis of a non-porous crystalline 1D Fe(ii) coordination polymer.
  • Characterization of the material's host-guest properties for acetonitrile.
  • Monitoring magneto-structural transitions via optical and electronic property changes.
  • Testing the reversibility of the sensing mechanism upon exposure to acetonitrile vapor.

Main Results:

  • A 1D Fe(ii) coordination polymer was synthesized, functioning as a host for acetonitrile.
  • Acetonitrile desorption induced detectable magneto-structural transitions, altering optical and electronic properties.
  • The material demonstrated reversible switching and optoelectronic readout upon exposure to acetonitrile vapor.
  • The iron-based coordination polymer exhibited robustness and simplicity in its design.

Conclusions:

  • The developed iron-based coordination polymer is suitable for sensing volatile acetonitrile.
  • The material's reversible magneto-structural transitions provide a unique sensing mechanism.
  • This coordination polymer could be integrated into multifunctional sensor devices for various organic compounds.
  • The study presents a promising, low-cost approach for VOC detection.