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Related Concept Videos

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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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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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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Lattice Centering and Coordination Number02:33

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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
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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.
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Coordinate Plane01:21

Coordinate Plane

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The Cartesian coordinate plane is a fundamental structure in mathematics that enables the visualization of relationships between numerical values in two dimensions. It is formed by two intersecting number lines: a horizontal x-axis and a vertical y-axis. These axes meet at the origin, the point where both values are zero. Their intersection divides the plane into four quadrants labeled in a counterclockwise direction starting from the upper right.An ordered pair of numbers represents every...
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Related Experiment Video

Updated: Feb 12, 2026

Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
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Rheoreversible Metallogels Derived from Coordination Polymers.

Sumi Ganguly1, Rumana Parveen1, Parthasarathi Dastidar1

  • 1Department of Organic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja Subodh Chandra Mullick Road, Kolktata, 700032, West Bengal, India.

Chemistry, an Asian Journal
|March 28, 2018
PubMed
Summary
This summary is machine-generated.

Seven of eight novel coordination polymers (CPs) function as metallogelators, with four exhibiting reversible gel properties. One ligand also formed an aqueous gel, enabling silver nanoparticle synthesis.

Keywords:
gelsnanoparticlespolymersrheologysolvothermal synthesis

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Area of Science:

  • Coordination Chemistry
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Coordination polymers (CPs) are synthesized using metal ions and organic ligands.
  • Bis(pyridyl)-bis(amide) ligands and dicarboxylates are explored for creating novel CP structures.
  • The occlusion of guest molecules within CP crystal lattices is investigated for potential applications.

Purpose of the Study:

  • To synthesize mixed-ligand-based Cd(II)/Co(II) coordination polymers (CPs).
  • To investigate the gelation behavior of these CPs as metallogelators.
  • To explore the potential of these materials in nanoparticle synthesis.

Main Methods:

  • Synthesis of CPs using bis(pyridyl)-bis(amide) ligands and various dicarboxylates.
  • Characterization using single-crystal X-ray diffraction, elemental analysis, PXRD, FTIR, and TGA.
  • Evaluation of gelation properties and rheological behavior of the synthesized CPs.

Main Results:

  • Eight mixed-ligand CPs were synthesized and characterized.
  • Seven of the eight CPs demonstrated metallogelator properties.
  • Four CPs (CPG1, CPG2, CPG4, CPG5) exhibited rheoreversible behavior.
  • One ligand (LP) formed an aqueous gel, facilitating silver nanoparticle production.

Conclusions:

  • The synthesized CPs show significant potential as metallogelators.
  • The rheoreversible properties of specific CPs are confirmed.
  • The formation of an aqueous gel from ligand LP opens avenues for nanoparticle synthesis.