The application of amino acid ionic liquids as additives in the ultrasound-assisted extraction of plant material?
RSC Advances Pub Date: 2021-07-27 DOI: 10.1039/D1RA03840K
Abstract
The aim of the present study was to determine the antioxidant activity of the aqueous extracts from Lycopodium clavatum, Cetraria islandica and Dipsacus fullonum obtained using aqueous solutions of ionic liquids by the ultrasound-assisted extraction (IL-UAE) method. Triethanolammonium salts [TEAH]+[AA]? of four amino acids of different hydrophobicity – isoleucine – Ile, methionine – Met, threonine – Thr and arginine – Arg, were chosen as ionic liquids, because they are based on natural, bio-renewable raw materials, such as amino acids and contain a pharmaceutically and cosmetically acceptable counterion of triethanolamine. Triethanolammonium salts were synthesized, identified by spectroscopic methods (NMR and FT-IR) and characterized by thermal methods (DSC and TGA). The 2.5% w/v aqueous solutions of triethanolammonium amino acid salts were used as the solvents in combination with ultrasound assisted extraction (UAE). The estimation of antioxidant properties was carried out using the DPPH, FRAP and CUPRAC assays. Total polyphenol content was measured using the reagent Folin–Ciocalteu. The results showed that the use of [TEAH]+[Thr]? or [TEAH]+[Met]? aqueous solutions increased the antioxidant activity of extracts in comparison to that achieved for extracts with pure water. The use of [TEAH]+[Thr]? as an additive for ultrasound-assisted extraction was characterized by obtaining plant extracts with the highest antioxidant potential, even 2.4-fold. The use of the AAIL-UAE method allowed obtaining higher amounts of polyphenols compared to pure water extracts, even 5.5-fold. The used method allowed the extraction of thermosensitive natural compounds, shortened the extraction time and lowered energy consumption.
Recommended Literature
- [1] An antimonate pyrochlore (H1.23Sr0.45SbO3.48) for photocatalytic oxidation of benzene: effective oxygen usage and excellent activity? Jing Chen,Yu Shao,Danzhen LiJ. Mater. Chem. A, 2017,5, 937-941 10.1039/C6TA08652G
- [2] An amide probe as a selective Al3+ and Fe3+ sensor inside the HeLa and a549 cell lines: Pictet–Spengler reaction for the rapid detection of tryptophan amino acid? Bidyut Kumar Kundu,Rinky Singh,Ritudhwaj Tiwari,Debasis NayakNew J. Chem., 2019,43, 4867-4877 10.1039/C9NJ00138G
- [3] An approach to asymmetric synthesis of β-aryl alanines by Pd(0)-catalyzed cross-coupling and cyanate-to-isocyanate rearrangement? Piotr Szcze?niak,Sebastian SteckoRSC Adv., 2015,5, 30882-30888 10.1039/C5RA02818C
- [4] An integrated process of CO2 capture and in situ hydrogenation to formate using a tunable ethoxyl-functionalized amidine and Rh/bisphosphine system? Yu-Nong Li,Liang-Nian He,Xian-Dong Lang,Xiao-Fang Liu,Shuai ZhangRSC Adv., 2014,4, 49995-50002 10.1039/C4RA08740B
- [5] Aggregated-fluorescent detection of PFAS with a simple chip Cheng Fang,Jinjian Wu,Zahra Sobhani,Md. Al Amin,Youhong TangAnal. Methods, 2019,11, 163-170 10.1039/C8AY02382D
- [6] An approach to biodegradable star polymeric architectures using disulfide coupling? Jingquan Liu,Huiyun Liu,Zhongfan Jia,Volga Bulmus,Thomas P. DavisChem. Commun., 2008, 6582-6584 10.1039/B817037A
- [7] An integrated droplet-digital microfluidic system for on-demand droplet creation, mixing, incubation, and sorting? Lab Chip, 2019,19, 524-535 10.1039/C8LC01170B
- [8] Aggregation-induced emission leading to two distinct emissive species in the solid-state structure of high-dipole organic chromophores? Felix Witte,Philipp Rietsch,Nithiya Nirmalananthan-Budau,Florian Weigert,Jan P. G?tze,Ute Resch-Genger,Siegfried Eigler,Beate PaulusPhys. Chem. Chem. Phys., 2021,23, 17521-17529 10.1039/D1CP02534A
- [9] An amorphous Cu–In–S nanoparticle-based precursor ink with improved atom economy for CuInSe2 solar cells with 10.85% efficiency? Green Chem., 2017,19, 1268-1277 10.1039/C6GC03280J
- [10] An amplified fluorescence detection of T4 polynucleotide kinase activity based on coupled exonuclease III reaction and a graphene oxide platform? Ni-Na Sun,Fengli Qu,Xiaobing Zhang,Shufang Zhang,Jinmao YouAnalyst, 2015,140, 1827-1831 10.1039/C4AN01953A
Journal Name：RSC Advances
research_products
-
CAS no.: 89640-58-4
![1,2,3,4,5,6-Hexahydro-[2,3]bipyridinyl-6-ol](https://ossimg.kuujia.com/scimg/1271000/1270529-38-8x500.png)
![N-(3-cyanothiolan-3-yl)-2-[(2,2,2-trifluoroethyl)sulfanyl]pyridine-4-carboxamide](https://ossimg.kuujia.com/scimg/1444500/1444113-98-7x500.png)
![2,2-Difluoro-3-[methyl(2-methylbutyl)amino]propanoic acid](https://ossimg.kuujia.com/scimg/2138500/2138166-62-6x500.png)
![2-(1H-indol-3-yl)-N-{[6-(thiophen-2-yl)-[1,2,4]triazolo[4,3-b]pyridazin-3-yl]methyl}acetamide](https://ossimg.kuujia.com/scimg/2034500/2034271-14-0x500.png)