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Related Concept Videos

Crown Ethers02:36

Crown Ethers

Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether molecules take.
Structures of Solids02:22

Structures of Solids

Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Ionic Crystal Structures02:42

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Network Covalent Solids02:18

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group with both...

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Functionalized coronenes: synthesis, solid structure, and properties.

Di Wu1, Hua Zhang, Jinhua Liang

  • 1Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China.

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|November 29, 2012
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Summary

Researchers synthesized functionalized coronenes from triphenylene building blocks. These novel materials exhibit diverse solid-state structures and promising optoelectronic properties for organic electronics.

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Area of Science:

  • Organic Chemistry
  • Materials Science
  • Solid-State Physics

Background:

  • Synthesizing complex polycyclic aromatic hydrocarbons like coronenes presents significant challenges.
  • Developing new functionalized coronenes is crucial for advancing organic electronic materials.

Purpose of the Study:

  • To construct functionalized coronenes utilizing triphenylene as a core building block.
  • To investigate the solid-state structures and optoelectronic properties of these novel coronenes.

Main Methods:

  • Utilized triphenylene derivatives for the synthesis of functionalized coronenes.
  • Performed single-crystal X-ray diffraction to analyze molecular packing and solid structures.
  • Characterized optoelectronic properties, including photostability and solubility.

Main Results:

  • Successfully synthesized a series of functionalized coronenes.
  • Observed distinct packing motifs in the single crystal structures, influencing material properties.
  • Demonstrated good solubility and high photostability for the synthesized coronenes.

Conclusions:

  • Triphenylene serves as an effective building block for constructing functionalized coronenes.
  • The investigated coronenes possess unique solid-state arrangements and favorable optoelectronic characteristics.
  • These materials show potential as solution-processable candidates for various organic electronic devices.