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Aerogeles de alginato de sodio funcionalizados con éter corona aza diseñado molecularmente para la eliminación
Teng Long1,2,3, Ayoub El Idrissi1,2,3, Lin Fu1,2,3
1School of Materials Science and Engineering, Hainan University, Haikou 570228, China.
Los investigadores desarrollaron aerogeles de alginato de sodio (ACSA) funcionalizados con éter corona aza para la eliminación selectiva de iones de cobre (Cu2+). Este enfoque ecológico ofrece un adsorbente estable y reutilizable para la purificación eficiente del agua y la remediación de metales pesados.
Sus antecedentes:
- La contaminación por metales pesados representa un riesgo significativo para la calidad del agua y los ecosistemas.
- El desarrollo de adsorbentes selectivos y sostenibles para la eliminación de metales pesados es crucial para una purificación eficaz del agua.
- Los métodos existentes a menudo carecen de selectividad o estabilidad a largo plazo.
Conclusiones:
- La estrategia de modificación del anillo de sacarosa desarrollada proporciona una ruta escalable y ambientalmente benigna para crear adsorbentes estables y de base biológica.
- La ACSA combina eficazmente las capacidades de reconocimiento molecular con la estabilidad estructural para una remediación eficiente de Cu2+.
- Este enfoque ofrece una solución prometedora para la eliminación selectiva de metales pesados en aplicaciones de purificación de agua.
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Ethers from Alcohols: Alcohol Dehydration and Williamson Ether Synthesis
Ethers can be prepared from organic compounds by various methods. Some of them are discussed below,
Preparation of Ethers by Alcohol Dehydration
In this method, in the presence of protic acids, alcohol dehydrates to produce alkenes and ethers under different conditions. For example, in the presence of sulphuric acid, dehydration of ethanol at 413 K yields ethoxyethane, whereas it yields ethene at 443 K.
Structure and Nomenclature of Ethers
Ethers are organic compounds with an ether functional group which is characterized by an oxygen atom connected to two — identical or different — alkyl, aryl, or vinyl groups. The C–O–C linkage in dimethyl ether — the simplest ether — has an approximately tetrahedral bond angle of 110.3 degrees. The oxygen atom is sp3- hybridized, with the C–O distance being about 140 pm.
Classification of Ethers
Based on their attached substituent...
Physical Properties of Ethers
An ether molecule has a net dipole moment due to the polarity of C–O bonds. Subsequently, boiling points of ethers are lower than those of alcohols of comparable molecular weight and slightly higher than those of hydrocarbons of comparable molecular weight (Table 1).
Ethers can act as hydrogen bond acceptors, making them more water-soluble than hydrocarbons, but since ethers cannot act as hydrogen bond donors, they are much less soluble in water than alcohols. Ethers are considered...
Autoxidation of Ethers to Peroxides and Hydroperoxides

