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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

Hydrogen Bonds

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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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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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Noncovalent Attractions in Biomolecules02:35

Noncovalent Attractions in Biomolecules

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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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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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Overview of Advanced Functional Groups02:22

Overview of Advanced Functional Groups

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Functional groups are groups of atoms with specific chemical properties that occur within organic molecules and are sometimes denoted as “R”. Functional groups can “functionalize” a compound by enabling it to adopt different physical and chemical properties.
Types of Advanced Functional Groups
The table below summarizes some of the major functional groups in organic chemistry.
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Hydrogen-Bonded Organic Frameworks as a Tunable Platform for Functional Materials.

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Hydrogen-bonded organic frameworks (HOFs) are novel porous materials built using hydrogen bonds. Their unique properties enable diverse applications in separation, sensing, and catalysis.

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Area of Science:

  • Materials Science
  • Supramolecular Chemistry

Background:

  • Hydrogen-bonded organic frameworks (HOFs) are emerging porous crystalline materials.
  • They self-assemble via hydrogen bonds, distinct from MOFs and COFs.
  • HOFs offer unique properties like mild synthesis and processability due to weaker H-bonds.

Purpose of the Study:

  • To review H-bonding motifs used in constructing porous HOFs.
  • To highlight the diverse applications of these HOFs.

Main Methods:

  • Judicious selection of hydrogen-bonding motifs.
  • Utilizing other weak interactions like π-π stacking and van der Waals forces.
  • Framework interpenetration strategies.

Main Results:

  • Construction of various porous HOFs.
  • Demonstration of HOFs' tunable platform for functional materials.
  • Identification of key H-bonding motifs and their role in framework assembly.

Conclusions:

  • HOFs represent a versatile class of materials with unique features.
  • Their applications span gas separation, chiral separation, sensing, catalysis, and more.
  • HOFs hold significant potential for advanced functional material development.