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Related Concept Videos

Ion Exchange01:17

Ion Exchange

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Aqueous Solutions and Heats of Hydration

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Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
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Intermolecular Forces03:13

Intermolecular Forces

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Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
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Common Ion Effect03:24

Common Ion Effect

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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
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Polyprotic Acids03:38

Polyprotic Acids

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Acids are classified by the number of protons per molecule that they can give up in a reaction. Acids such as HCl, HNO3, and HCN that contain one ionizable hydrogen atom in each molecule are called monoprotic acids. Their reactions with water are:
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Solvating Effects02:12

Solvating Effects

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An understanding of the solvating effect helps rationalize the relation between solvation and acidity of the compound. In addition, this also explains the relative stability of conjugate bases for compounds with different pKa values. This lesson details, in-depth, the principle of solvating effects. The strength of an acid and the stability of its corresponding conjugate base are determined using pKa values. This observed relationship is a consequence of solvation, which is the interaction...
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Distinct Cation Roles and Shared Anion Mechanism in Hydroxide-Based Cellulose Solvents.

Lingfeng Zhou1, Wenze Cao1, Jinghua Wu1

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|January 12, 2026
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This summary is machine-generated.

Benzyltrimethylammonium hydroxide offers a more effective cellulose dissolution pathway than sodium hydroxide by disrupting hydrogen bonds and compensating for dispersion forces. This advanced cation interaction reduces the energy required for dissolving cellulose.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Computational Chemistry

Background:

  • Cellulose's crystalline structure, stabilized by hydrogen bonds and dispersion forces, presents a significant challenge for dissolution.
  • Current industrially relevant hydroxide systems for cellulose dissolution necessitate energy-intensive subzero temperatures.

Purpose of the Study:

  • To investigate the molecular mechanisms of cellulose dissolution using benzyltrimethylammonium hydroxide (BzMe3NOH) and sodium hydroxide (NaOH).
  • To elucidate the roles of cation-anion interactions and solvation effects in cellulose dissolution.

Main Methods:

  • Utilized molecular dynamics simulations to analyze the interactions between cellulose and hydroxide-based solvents.
  • Examined cation binding, anion-cellulose interactions, and solvation shell dynamics.

Main Results:

  • Sodium ions (Na+) interact electrostatically with cellulose, while benzyltrimethylammonium cations (BzMe3N+) interact via van der Waals forces along the hydrophobic backbone.
  • Hydroxide ions form bifurcated hydrogen bonds with cellulose hydroxyl groups, facilitating transient deprotonation.
  • BzMe3N+ cations displace more water molecules from the cellulose solvation shell compared to Na+, reducing the entropic penalty of dissolution.

Conclusions:

  • Effective cellulose dissolution in hydroxide systems requires a synergistic approach combining anion-mediated hydrogen bond disruption and cation-mediated dispersion force compensation.
  • BzMe3NOH presents a potentially more efficient and less energy-intensive alternative for cellulose dissolution compared to NaOH.