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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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Noncovalent Attractions in Biomolecules02:35

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Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
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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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Polymer Classification: Architecture01:14

Polymer Classification: Architecture

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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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Structure of Alkanes02:23

Structure of Alkanes

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The formation of carbon-carbon bonds leading to the creation of the carbon chain is the basis of organic chemistry. August Kekulé and Archibald Scott Couper independently developed this idea of carbon chain formation.
Hydrocarbons are the simplest organic compounds composed of carbons and hydrogens. Based on the bond order between carbons, the hydrocarbons are further classified into alkanes, alkenes, and alkynes. 
Alkanes are the simplest hydrocarbons with sp3 hybrid carbon atoms....
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Newman Projections02:06

Newman Projections

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Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
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Hydrogen-Bonded Organic Frameworks: Structural Design and Emerging Applications.

Xiaojun Ding1, Yi Xie1, Qiang Gao1

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Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
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Hydrogen-bonded organic frameworks (HOFs) offer tunable functionalities for diverse applications. These HOFs are designed using specific molecular structures and hydrogen bonding motifs, enhancing their processability and expanding their use.

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Area of Science:

  • Materials Science
  • Supramolecular Chemistry

Background:

  • Hydrogen bonding (H-bonding) is a fundamental intermolecular force crucial for molecular assembly.
  • Hydrogen-bonded organic frameworks (HOFs) are porous materials constructed via H-bonding interactions.
  • HOFs offer advantages over traditional frameworks, including intrinsic decomposition and regeneration capabilities.

Purpose of the Study:

  • To outline the fundamental concepts for constructing hydrogen-bonded organic frameworks (HOFs).
  • To discuss feasible hydrogen-bonded motifs and effective molecular designs for HOFs.
  • To review the emerging applications of HOFs across various domains.

Main Methods:

  • Review of literature on HOF construction principles.
  • Analysis of hydrogen-bonded motifs and molecular building blocks.
  • Compilation of reported HOF applications.

Main Results:

  • Identification of key H-bonding motifs and molecular designs for HOF synthesis.
  • Demonstration of HOFs' unique properties like self-healing and recyclability.
  • Cataloging of diverse applications, including gas storage, catalysis, and sensing.

Conclusions:

  • HOFs represent a promising class of materials with tunable properties.
  • The design principles discussed enable the creation of advanced HOFs.
  • HOFs hold significant potential for addressing challenges in multiple scientific and industrial fields.