Excess Molar Enthalpies of Deep Eutectic Solvents (DESs) Composed of Quaternary Ammonium Salts and Glycerol or Ethylene Glycol

2016 ◽  
Vol 61 (12) ◽  
pp. 4245-4251 ◽  
Author(s):  
Pablo López-Porfiri ◽  
Joan F. Brennecke ◽  
Maria Gonzalez-Miquel
Keyword(s):  
Ethylene Glycol ◽  
Quaternary Ammonium ◽  
Deep Eutectic Solvents ◽  
Quaternary Ammonium Salts ◽  
Excess Molar Enthalpies ◽  
Ammonium Salts

Hydrophobic deep eutectic solvents as water-immiscible extractants

2015 ◽  
Vol 17 (9) ◽  
pp. 4518-4521 ◽  
Author(s):  
Dannie J.G.P. van Osch ◽  
Lawien F. Zubeir ◽  
Adriaan van den Bruinhorst ◽  
Marisa A.A. Rocha ◽  
Maaike C. Kroon
Keyword(s):  
Quaternary Ammonium ◽  
Deep Eutectic Solvents ◽  
Decanoic Acid ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts

Hydrophobic deep eutectic solvents consisting of decanoic acid and various quaternary ammonium salts are presented and evaluated as extractants.

Efficient extraction of indole from wash oil by quaternary ammonium salts via forming deep eutectic solvents

Fuel ◽  
2018 ◽  
Vol 215 ◽  
pp. 330-338 ◽  
Author(s):  
Youan Ji ◽  
Yucui Hou ◽  
Shuhang Ren ◽  
Muge Niu ◽  
Congfei Yao ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Deep Eutectic Solvents ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Efficient Extraction

Recovery of gold from hydrochloric medium by deep eutectic solvents based on quaternary ammonium salts

2019 ◽  
Vol 188 ◽  
pp. 264-271 ◽  
Author(s):  
Yuqi Geng ◽  
Zeyang Xiang ◽  
Cheng Lv ◽  
Ning Wang ◽  
Yudong Wang ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Deep Eutectic Solvents ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts

scholarly journals Controlled release of pharmaceutical agents using eutectic modified gelatin

2021 ◽  
Author(s):  
Wanwan Qu ◽  
Idrees B. Qader ◽  
Andrew P. Abbott
Keyword(s):  
Hydrogen Bond ◽  
Carboxylic Acids ◽  
Quaternary Ammonium ◽  
Transdermal Delivery ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Delivery Mode ◽  
Hydrogen Bond Acceptor

AbstractDeep eutectic solvent (DES) is a class of ionic liquids, consisting of a mixture generally formed by combining hydrogen bond donors (HBDs) such as alcohols, amides and carboxylic acids with various quaternary ammonium salts. The decrease in melting points of the constituents is due to the charge delocalization during formation of hydrogen bonding between the hydrogen bond acceptor with the hydrogen bond donor. This can be considered one of the main reasons for increasing solubility and absorption of DESs. Most active pharmaceutical ingredients (APIs) have polar functional groups containing amide, carboxylic acid, alcohol or quaternary ammonium groups. These tend to increase the melting point of the compounds, but they can be used to form eutectic mixtures. While this concept has previously used, the combination of quaternary ammonium salts with amides, carboxylic acids and alcohols can result in large depressions of freezing points and so-called deep eutectic solvents are formed. DESs mix readily with water and so could increase the uptake of APIs. In this study, pharmaceutical deep eutectic solvents (PDESs) are formulated from 3 APIs: imipramine HCl, ascorbic acid and catechol. These PDESs were used to plasticise gelatine. It is shown that the materials formed can be used to increase the rate of API uptake via both oral and transdermal delivery modes. Thus, the concentration of the PDESs in solution reaches the maximum before the pure drugs. Particularly for catechol, after 1 s, the dissolution of the PDESs was more than twice that of the pure drug. Moreover, the transdermal delivery mode uptake of the PDES based on imipramine HCl from the patch after 15 min was found to be 65% compared with just imipramine HCl which released only 20%. Graphical abstract

scholarly journals Deep eutectic solvents formed by quaternary ammonium salts and aprotic organic compound succinonitrile

2019 ◽  
Vol 274 ◽  
pp. 414-417 ◽  
Author(s):  
Dezhong Yang ◽  
Shaoze Zhang ◽  
Xiao-guang Sun ◽  
De-en Jiang ◽  
Sheng Dai
Keyword(s):  
Organic Compound ◽  
Quaternary Ammonium ◽  
Deep Eutectic Solvents ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts
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