Molecular interaction between three novel amino acid based deep eutectic solvents with surface active ionic liquid: A comparative study

Manoj Kumar Banjare; Benvikram Barman; Kamalakanta Behera; Javed Masood Khan; Ramesh Kumar Banjare; Siddharth Pandey; Kallol Kumar Ghosh

doi:10.1016/j.heliyon.2024.e35598

Molecular interaction between three novel amino acid based deep eutectic solvents with surface active ionic liquid: A comparative study

Heliyon. 2024 Aug 5;10(15):e35598. doi: 10.1016/j.heliyon.2024.e35598. eCollection 2024 Aug 15.

Authors

Manoj Kumar Banjare¹, Benvikram Barman¹, Kamalakanta Behera², Javed Masood Khan³, Ramesh Kumar Banjare⁴, Siddharth Pandey⁵, Kallol Kumar Ghosh⁶

Affiliations

¹ Department of Chemistry (MSS), MATS University, Pagaria Complex, Pandri, Raipur, Chhattisgarh, 492004, India.
² Department of Chemistry, University of Allahabad, Prayagraj, Uttar Pradesh, 211002, India.
³ Department of Food Science and Nutrition, College of Food and Agricultural Sciences, King Saud University, Riyadh, 11451, Saudi Arabia.
⁴ Department of Chemistry(MSET), MATS University, Gullu Campus, Arang, Raipur, C.G., 493441, India.
⁵ Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
⁶ School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, 492010, India.

Abstract

Interaction between a surface active ionic liquid (IL) viz. 1-decyl-3-methylimidazolium chloride [Dmim][Cl] with three novel amino acid-based deep eutectic solvents (DES, consisting of choline chloride and l-methionine (DES1), l-phenylalanine (DES2), and l-glutamine (DES3) in a 1: 2 mol ratio) is studied. Several techniques, including surface tension, fluorescence, UV-visible spectroscopy, and Fourier transform infrared (FTIR), were used to investigate the key micellar properties and intermolecular interactions between the IL and DESs. All the DESs studied here facilitate the micellization process successfully lowering the critical micelle concentrations (CMC) of [Dmim][Cl] with addition of 5 wt% and 10 wt% of DESs. In decreasing order of DES2 > DES1 > DES3, the affinity to promote IL [Dmim][Cl] aggregation within aqueous DES solutions. Additionally, the CMC values as well as the surface tension at CMC are both noticeably reduced significantly by DES2. The surface tension method determines how three amino acid-based DESs affect the CMC, Г_max, π_CMC, A_min and pC₂₀ of micellization. When IL [Dmim][Cl] forms micelles within DES solutions, the solvophobic effect predominates, and the intermolecular hydrogen-bond interaction helps to form micelles. FTIR was used to examine the molecular interactions and structural changes of the ionic liquid self-assemblies in aqueous DESs. The results show that the presence of DESs greatly aids in the micellization of [Dmim][Cl], and to a greater extent for DES2 than for DES1/DES3. The colloidal properties of DES and their mixtures are advantageous for the solubility, micellization, and other features of ionic liquids; further details on this positive observation are provided in the results and discussion. In the areas of micellization, CMC, synthesis, catalysis, and environmental, biological, and pharmaceutical applications, among others, DESs are extremely useful.

Keywords: 1-Decyl-3-methylimidazolium chloride; Amino acid-based deep eutectic solvents; CMC; FTIR; Interfacial parameters.