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Related Concept Videos

Hydrogen Bonds01:04

Hydrogen Bonds

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A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
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Hydrogen Bonds00:26

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Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
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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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Characteristics and Nomenclature of Homopolymers01:00

Characteristics and Nomenclature of Homopolymers

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Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
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Aromatic Hydrocarbon Anions: Structural Overview01:18

Aromatic Hydrocarbon Anions: Structural Overview

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Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
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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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Porous Hydrogen-Bonded Organic Frameworks.

Yi-Fei Han1,2, Ying-Xue Yuan3,4, Hong-Bo Wang5,6

  • 1Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, Hubei, China. 15200828166@163.com.

Molecules (Basel, Switzerland)
|February 18, 2017
PubMed
Summary

Researchers are exploring porous hydrogen-bonded organic frameworks (HOFs) for advanced applications. This work summarizes design strategies for HOF building motifs, addressing challenges in their predictable self-aggregation and preparation.

Keywords:
hydrogen bondsorganic porous frameworkssupramolecular self-assembly

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Area of Science:

  • Supramolecular chemistry
  • Materials science
  • Nanotechnology

Background:

  • Ordered porous solid-state architectures are constructed via non-covalent supramolecular self-assembly.
  • Porous metal-coordination organic frameworks (MOFs) are formed by metal centers and organic linkers.
  • Porous hydrogen-bonded organic frameworks (HOFs) offer advantages in purification and recovery over MOFs.

Purpose of the Study:

  • To summarize recent developments in porous hydrogen-bonded organic frameworks (HOFs).
  • To provide deeper insights into design strategies for basic building motifs in HOFs.
  • To address the challenges in rational design and preparation of porous HOFs due to difficulties in controlling self-aggregation.

Main Methods:

  • Literature review of recent advancements in porous HOFs.
  • Analysis of design strategies for supramolecular building motifs.
  • Discussion of challenges and potential solutions in HOF synthesis.

Main Results:

  • Recent progress in the development of porous HOFs has been reviewed.
  • Key design principles for creating predictable self-aggregation of building motifs are discussed.
  • The challenges associated with the rational design and preparation of HOFs are highlighted.

Conclusions:

  • Porous HOFs represent a promising class of materials with unique advantages.
  • Further research into design strategies for building motifs is crucial for advancing HOF development.
  • Overcoming challenges in predictable self-aggregation will enable wider applications of HOFs.