Hydrophilicity

, The electrons in the water molecules are attracted to the oxygen atom side.

Model of hydrogen bonding between water molecules. As shown in the figure, δ + and δ- Hydrogen bonds by attracting. Similar hydrogen bonds occur between water and hydrophilic molecules, whereby hydrophilic molecules are dissolved in water.

Hydrophilicity(hydrophilicity, hydrophile, hydrophilicity) is (H2 O) And the species that exhibits affinity between the two species. Its affinity is usually derived from. In addition, the term hydrophile meaning hydrophilicity is "water" It is derived from "hydros" meaning "water" (water) and "φιλια" (philia) meaning "friendship" (friendship).

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Overview

Hydrophilicity is a phenomenon which is preferable in terms of (namely, decreasing) a property that makes it easy to form water or is easily mixed with water by making a hydrogen bond with water. Hydrophilic molecules are soluble in water as well as water. However, even when it does not dissolve in water, for example, even when the surface of the material is easily wetted by water (it does not make waterdrops, does not repel), it may be expressed as hydrophilic.

Hydrophilic molecules (eg, etc.) or hydrophilic groups (such as carboxylic acids in eg) can form hydrogen bonds due to their polarity and are therefore more soluble in water than hydrophobic. Hydrophilic molecules are also known as goats. Some hydrophilic substances are insoluble, such as. The substance has a hydrophilic head and a hydrophobic tail so it dissolves in both polar and nonpolar solvents.

Empirical rule

Approximately as regards the organic water solubility, when there is one hydrophilic group that does not take at least 5 or at least one hydrophilic group charged per 7 carbons is present, water It is known that the solubility of the molecule to 1% or more in.

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footnote

1. ****Medical CHEMISTRY Compendium. By Anders Overgaard Pedersen and Henning Nielsen. Aarhus University. 2008

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Post Date : 2018-02-05 11:30

This article is taken from the Japanese Wikipedia Hydrophilicity

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