Application of pyridinium ionic liquids in extraction of total flavonoids from seabuckthorn leaves was written by Zhao, San-hu;Wang, Ming-shan;Qiao, Yong-sheng;Dong, Zhi-yun;Liu, Gai-mei. And the article was included in Huaxue Shiji in 2018.Formula: C17H30BrN This article mentions the following:
In this work, six kinds of pyridinium ionic liquids were prepared and their aqueous solution was applied in extraction total flavonoids from seabuckthorn leaves. The results showed that using 1 mol/L aqueous solution of N-dodecyl pyridinium bromide as the extraction agent to extract the total flavonoids from the seabuckthorn leaves dried naturally, under the microwave irradiation at 50°C, the extraction rate 3.65% was obtained after 5 min. Based on the method of pharmacopoeia, using ethanol as extraction agent, the extraction rate was only 2.72% after 3 h. So the microwave-assisted extraction total flavonoid with pyridinium ionic liquids as extraction agents is an efficient and convenient method. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Formula: C17H30BrN).
1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Formula: C17H30BrN