Difference between revisions of "Amphiphilic"

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== Introduction ==
 
== Introduction ==
  
"Amphiphilic" is used to describe the properties of a certain group of chemicals. A chemical substance being amphiphilic possesses both [[hydrophilic]] and [[lipophilic]] functional groups. As a result, amphiphilic compounds show good affinity for both water and oil, and have relatively high solubility in polar solvents like water and some non-polar solvents.
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"Amphiphilic" is used to describe the properties of a certain group of chemicals. A chemical substance being amphiphilic possesses both [[hydrophilic]] and [[lipophilic]] functional groups. As a result, amphiphilic compounds show good affinity for both water and oil.
  
 
== Structure and examples of amphiphilic molecules ==
 
== Structure and examples of amphiphilic molecules ==
  
In amphiphilic molecules, the hydrophilic group is usually charged and highly polar. Examples include carboxylates -RCO<sub>2</sub><sup>-</sup> and sulfonates -SO<sub>3</sub><sup>-</sup> with negative charges and amines -NH<sub>3</sub><sup>+</sup> with positive charges.
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In amphiphilic molecules, the hydrophilic group is usually charged and highly polar. Examples include carboxylates -CO<sub>2</sub><sup>-</sup> and sulfonates -SO<sub>3</sub><sup>-</sup> with negative charges and amines -NH<sub>3</sub><sup>+</sup> with positive charges. Sometimes a structure containing polar hydroxyl groups can also serve as the hydrophilic part. The lipophilic part is usually a long chain of nonpolar hydrocarbon structures. This special structure leads to relatively high solubility in both polar solvents like water and a large variety of nonpolar solvents.
  
 
See also:
 
See also:

Revision as of 22:32, 8 December 2011

Written by Yuhang Jin, AP225 2011 Fall.

Introduction

"Amphiphilic" is used to describe the properties of a certain group of chemicals. A chemical substance being amphiphilic possesses both hydrophilic and lipophilic functional groups. As a result, amphiphilic compounds show good affinity for both water and oil.

Structure and examples of amphiphilic molecules

In amphiphilic molecules, the hydrophilic group is usually charged and highly polar. Examples include carboxylates -CO2- and sulfonates -SO3- with negative charges and amines -NH3+ with positive charges. Sometimes a structure containing polar hydroxyl groups can also serve as the hydrophilic part. The lipophilic part is usually a long chain of nonpolar hydrocarbon structures. This special structure leads to relatively high solubility in both polar solvents like water and a large variety of nonpolar solvents.

See also:

Amphiphilic in Surfactants from Lectures for AP225.

Keyword in references:

Amphiphilic Crescent-Moon-Shaped Microparticles Formed by Selective Adsorption of Colloids