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Organic Compounds03:02

Organic Compounds

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All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
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What is Organic Chemistry?02:17

What is Organic Chemistry?

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Organic chemistry is the study of compounds of carbon called organic compounds. Organic compounds either originate from living organisms or are synthesized by chemists. A defining trait of these compounds is the presence of carbon as the principal element, which is bonded to other carbon atoms and other elements such as hydrogen, oxygen, nitrogen, and sulfur. The existence of a wide array of organic molecules is a consequence of carbon atoms’ ability to form up to four strong bonds to...
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Five-Membered Heterocyclic Aromatic Compounds: Overview01:13

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Heterocyclic aromatic compounds are cyclic compounds that are aromatic and have one or more heteroatoms—atoms other than carbon, in the ring. Depending upon the number of atoms present in the ring, they can be either five or six-membered. Examples of five-membered heterocyclic aromatic compounds include pyrrole, furan, thiophene, and imidazole. Pyrrole consists of one nitrogen atom having one lone pair of electrons. Furan and thiophene have one oxygen and one sulfur heteroatom,...
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MO Theory and Covalent Bonding02:40

MO Theory and Covalent Bonding

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The molecular orbital theory describes the distribution of electrons in molecules in a manner similar to the distribution of electrons in atomic orbitals. The region of space in which a valence electron in a molecule is likely to be found is called a molecular orbital. Mathematically, the linear combination of atomic orbitals (LCAO) generates molecular orbitals. Combinations of in-phase atomic orbital wave functions result in regions with a high probability of electron density, while...
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Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

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Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
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Structures of Carboxylic Acid Derivatives01:28

Structures of Carboxylic Acid Derivatives

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Structure of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the...
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Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
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Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

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Macrocycle-Based Covalent Organic Frameworks.

Yufei Yuan1, Ki-Taek Bang1, Rui Wang1

  • 1Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, China.

Advanced Materials (Deerfield Beach, Fla.)
|January 6, 2023
PubMed
Summary
This summary is machine-generated.

Macrocycle-based covalent organic frameworks (M-COFs) prevent macrocycle aggregation, preserving their functions. This innovative approach unlocks advanced applications in catalysis, separation, and optoelectronics.

Keywords:
2D materialsadsorptioncovalent organic frameworksmacrocyclessingle-atom catalyst

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Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Nanotechnology

Background:

  • Macrocycles are crucial in materials science due to their defined cavities and supramolecular capabilities.
  • Macrocycle aggregation hinders their application by blocking active sites.
  • Covalent organic frameworks (COFs) offer a stable, porous platform to integrate macrocycles.

Purpose of the Study:

  • To review the recent advancements in macrocycle-based covalent organic frameworks (M-COFs).
  • To discuss the synthesis, properties, and diverse applications of M-COFs.
  • To provide an outlook on the future challenges and opportunities in this field.

Main Methods:

  • Installation of macrocycles into covalent organic frameworks (COFs).
  • Synthesis of macrocycle-based COFs (M-COFs).
  • Characterization of M-COF properties and performance.

Main Results:

  • M-COFs effectively prevent macrocycle aggregation, maintaining their inherent activities.
  • M-COFs exhibit unique properties not achievable with conventional macrocycle composites.
  • Applications demonstrated in single-atom catalysis, adsorption/separation, optoelectronics, and phototherapy.

Conclusions:

  • Integrating macrocycles into COFs is a powerful strategy to overcome aggregation issues.
  • M-COFs represent a new class of advanced materials with superior and versatile functionalities.
  • This field holds significant promise for future materials innovation and technological development.