{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T15:47:36Z","timestamp":1788364056790,"version":"build-2803163510"},"reference-count":75,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2025,2,26]],"date-time":"2025-02-26T00:00:00Z","timestamp":1740528000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the Breakthrough Electrolytes for Energy Storage Energy Frontier Research Center (BEES EFRC)","award":["DE-SC0019409"],"award-info":[{"award-number":["DE-SC0019409"]}]},{"name":"the Basic Energy Sciences program, U.S. Department of Energy, Office of Science","award":["DE-SC0019409"],"award-info":[{"award-number":["DE-SC0019409"]}]},{"name":"CWRU","award":["DE-SC0019409"],"award-info":[{"award-number":["DE-SC0019409"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>This study aimed to determine the structure\u2013function relationship (SFR) for ChCl\u2013glycerol mixtures, a deep eutectic solvent (DES), by investigating their microscopic solvation dynamics and how it relates to their macroscopic properties across varying concentrations of ChCl. Femtosecond transient absorption (fs-TA) spectroscopy revealed two distinct solvation dynamics time constants: \u03c41, governed by glycerol\u2013glycerol interactions, and \u03c42, dominated by the choline response. The \u03c42 minimum at 25\u201330 mol % ChCl closely aligned with the eutectic composition (~33.33 mol % ChCl), where the glycerol network was the most organized and the choline ions exhibited the fastest relaxation. The viscosity decreased sharply up to ~25 mol % ChCl and then plateaued, while the conductivity increased monotonically with ChCl concentration, reflecting enhanced ionic mobility. The density decreased with both increasing ChCl concentration and temperature, indicating disrupted hydrogen bonding and reduced molecular packing. The polarity, measured using betaine-30 (B30) and the ET(30) polarity scale, increased steeply up to approximately 25 mol % ChCl before reaching a plateau. These findings identified the eutectic composition as the optimal concentration range for balancing stability, fluidity, conductivity, and enhanced dynamics within the glycerol system.<\/jats:p>","DOI":"10.3390\/molecules30051059","type":"journal-article","created":{"date-parts":[[2025,2,26]],"date-time":"2025-02-26T04:46:37Z","timestamp":1740545197000},"page":"1059","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Insights from Femtosecond Transient Absorption Spectroscopy into the Structure\u2013Function Relationship of Glyceline Deep Eutectic Solvents"],"prefix":"10.3390","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9619-1491","authenticated-orcid":false,"given":"Rathiesh","family":"Pandian","sequence":"first","affiliation":[{"name":"Department of Chemistry, College of Arts and Sciences, Case Western Reserve University, Cleveland, OH 44106, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7342-2840","authenticated-orcid":false,"given":"Clemens","family":"Burda","sequence":"additional","affiliation":[{"name":"Department of Chemistry, College of Arts and Sciences, Case Western Reserve University, Cleveland, OH 44106, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,2,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Pig\u0142owska, M., Kurc, B., Gali\u0144ski, M., Fu\u0107, P., Kami\u0144ska, M., Szymlet, N., and Daszkiewicz, P. (2021). Challenges for safe electrolytes applied in lithium-ion cells\u2014A review. Materials, 14.","DOI":"10.3390\/ma14226783"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1137","DOI":"10.1007\/s10800-011-0348-2","article-title":"Redox flow batteries: A review","volume":"41","author":"Weber","year":"2011","journal-title":"J. Appl. Electrochem."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"325","DOI":"10.1016\/j.rser.2013.08.001","article-title":"Redox flow batteries for the storage of renewable energy: A review","volume":"29","author":"Alotto","year":"2014","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Mohamed, M.R., Sharkh, S.M., and Walsh, F.C. (2009, January 7\u201311). Redox flow batteries for hybrid electric vehicles: Progress and challenges. Proceedings of the 2009 IEEE Vehicle Power and Propulsion Conference, Dearborn, MI, USA.","DOI":"10.1109\/VPPC.2009.5289801"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"100833","DOI":"10.1016\/j.coche.2022.100833","article-title":"Future perspective on redox flow batteries: Aqueous versus nonaqueous electrolytes","volume":"37","author":"Tang","year":"2022","journal-title":"Curr. Opin. Chem. Eng."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"9142","DOI":"10.1021\/ja048266j","article-title":"Deep Eutectic Solvents formed between choline chloride and carboxylic acids: Versatile alternatives to ionic liquids","volume":"126","author":"Abbott","year":"2004","journal-title":"J. Am. Chem. Soc."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Abbott, A.P., Capper, G., Davies, D.L., Rasheed, R.K., and Tambyrajah, V. (2003). Novel solvent properties of choline chloride\/urea mixtures. Chem. Commun., 70\u201371.","DOI":"10.1039\/b210714g"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"2616","DOI":"10.1021\/ef5028873","article-title":"Deep eutectic solvents: Physicochemical properties and gas separation applications","volume":"29","author":"Aparicio","year":"2015","journal-title":"Energy Fuels"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"7108","DOI":"10.1039\/c2cs35178a","article-title":"Deep eutectic solvents: Syntheses, properties and applications","volume":"41","author":"Zhang","year":"2012","journal-title":"Chem. Soc. Rev."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2011102","DOI":"10.1002\/adfm.202011102","article-title":"Deep Eutectic Solvents for Boosting Electrochemical Energy Storage and Conversion: A Review and Perspective","volume":"31","author":"Wu","year":"2021","journal-title":"Adv. Funct. Mater."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1232","DOI":"10.1021\/acs.chemrev.0c00385","article-title":"Deep Eutectic Solvents: A Review of Fundamentals and Applications","volume":"121","author":"Hansen","year":"2021","journal-title":"Chem. Rev."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Ijardar, S.P., Singh, V., and Gardas, R.L. (2022). Revisiting the Physicochemical Properties and Applications of Deep Eutectic Solvents. Molecules, 27.","DOI":"10.3390\/molecules27041368"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"A578","DOI":"10.1149\/2.0061605jes","article-title":"Communication\u2014Iron Ionic Liquid Electrolytes for Redox Flow Battery Applications","volume":"163","author":"Miller","year":"2016","journal-title":"J. Electrochem. Soc."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"11060","DOI":"10.1021\/cr300162p","article-title":"Deep Eutectic Solvents (DESs) and Their Applications","volume":"114","author":"Smith","year":"2014","journal-title":"Chem. Rev."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"868","DOI":"10.1039\/b702833d","article-title":"Extraction of glycerol from biodiesel into a eutectic based ionic liquid","volume":"9","author":"Abbott","year":"2007","journal-title":"Green Chem."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"82","DOI":"10.1039\/C0GC00395F","article-title":"Glycerol eutectics as sustainable solvent systems","volume":"13","author":"Abbott","year":"2011","journal-title":"Green Chem."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"219","DOI":"10.1038\/s41467-021-27842-z","article-title":"Evolution of microscopic heterogeneity and dynamics in choline chloride-based deep eutectic solvents","volume":"13","author":"Spittle","year":"2022","journal-title":"Nat. Commun."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"5251","DOI":"10.1021\/acs.jpcb.0c04058","article-title":"Liquid Structure and Transport Properties of the Deep Eutectic Solvent Ethaline","volume":"124","author":"Zhang","year":"2020","journal-title":"J. Phys. Chem. B"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1229","DOI":"10.1021\/acs.jpcb.9b10751","article-title":"Structural Properties and Hydrogen-Bonding Interactions in Binary Mixtures Containing a Deep-Eutectic Solvent and Acetonitrile","volume":"124","author":"Kalhor","year":"2020","journal-title":"J. Phys. Chem. B"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"15246","DOI":"10.1021\/acsomega.8b02447","article-title":"Influence of Hydration on the Structure of Reline Deep Eutectic Solvent: A Molecular Dynamics Study","volume":"3","author":"Kumari","year":"2018","journal-title":"ACS Omega"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1156","DOI":"10.1039\/D1EE02920G","article-title":"Reline deep eutectic solvent as a green electrolyte for electrochemical energy storage applications","volume":"15","author":"Azmi","year":"2022","journal-title":"Energy Environ. Sci."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"95","DOI":"10.1016\/j.tca.2014.11.028","article-title":"Densities of aqueous mixtures of (choline chloride + ethylene glycol) and (choline chloride + malonic acid) deep eutectic solvents in temperature range 283.15\u2013363.15 K","volume":"600","author":"Yadav","year":"2015","journal-title":"Thermochim. Acta"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"11014","DOI":"10.1021\/acs.jpcb.9b09729","article-title":"Structural, Thermodynamic, and Transport Properties of Aqueous Reline and Ethaline Solutions from Molecular Dynamics Simulations","volume":"123","author":"Celebi","year":"2019","journal-title":"J. Phys. Chem. B"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"034505","DOI":"10.1063\/5.0056653","article-title":"Assessing rotation and solvation dynamics in ethaline deep eutectic solvent and its solutions with methanol","volume":"155","author":"LaRocca","year":"2021","journal-title":"J. Chem. Phys."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"2446","DOI":"10.1021\/acs.jced.9b01113","article-title":"Thermodynamic Study of Choline Chloride-Based Deep Eutectic Solvents with Water and Methanol","volume":"65","author":"Wang","year":"2020","journal-title":"J. Chem. Eng. Data"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"8888","DOI":"10.1021\/acs.jpcb.1c04629","article-title":"Solvation Dynamics of Wet Ethaline: Water is the Magic Component","volume":"125","author":"Alfurayj","year":"2021","journal-title":"J. Phys. Chem. B"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"123448","DOI":"10.1016\/j.molliq.2023.123448","article-title":"Solvation dynamics of choline fluoride in ethylene glycol\u2014Water mixtures","volume":"392","author":"Alfurayj","year":"2023","journal-title":"J. Mol. Liq."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"6467","DOI":"10.1039\/C9CP00036D","article-title":"Thermophysical properties of glyceline\u2013water mixtures investigated by molecular modelling","volume":"21","author":"Baz","year":"2019","journal-title":"Phys. Chem. Chem. Phys."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"143082","DOI":"10.1016\/j.electacta.2023.143082","article-title":"Hydrodynamic voltammetry of Fe2+\/3+ in aqueous deep eutectic solvents towards redox flow batteries","volume":"467","author":"Prado","year":"2023","journal-title":"Electrochim. Acta"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"2762","DOI":"10.1021\/acs.jpcb.3c07625","article-title":"Unusual Hydration Properties of Choline Fluoride-Based Deep Eutectic Solvents","volume":"128","author":"Alfurayj","year":"2024","journal-title":"J. Phys. Chem. B"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"122856","DOI":"10.1016\/j.molliq.2023.122856","article-title":"Effect of water and hydrogen bond acceptor on the density and viscosity of glycol-based eutectic solvents","volume":"389","author":"Aravena","year":"2023","journal-title":"J. Mol. Liq."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"272","DOI":"10.1016\/j.jct.2019.02.010","article-title":"Physicochemical properties of choline chloride-based deep eutectic solvents and excess properties of their pseudo-binary mixtures with 1-butanol","volume":"133","author":"Lubben","year":"2019","journal-title":"J. Chem. Thermodyn."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"122454","DOI":"10.1016\/j.molliq.2023.122454","article-title":"Choline Fluoride-Ethylene glycol deep eutectic solvent mixture\u2014Synthesis and physicochemical properties","volume":"386","author":"Alfurayj","year":"2023","journal-title":"J. Mol. Liq."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"138702","DOI":"10.1016\/j.cplett.2021.138702","article-title":"Deep eutectic solvents: A structural point of view on the role of the anion","volume":"777","author":"Migliorati","year":"2021","journal-title":"Chem. Phys. Lett."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"2473","DOI":"10.1021\/acs.jpcb.0c00594","article-title":"Complete Solvation Dynamics of Coumarin 153 in Tetraalkylammonium Bromide-Based Deep Eutectic Solvents","volume":"124","author":"Hossain","year":"2020","journal-title":"J. Phys. Chem. B"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"2388","DOI":"10.3390\/molecules15042388","article-title":"Synthesis and physico-chemical properties of new tetraethylammonium-based amino acid chiral ionic liquids","volume":"15","author":"Rahman","year":"2010","journal-title":"Molecules"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"8011","DOI":"10.3390\/molecules19068011","article-title":"Tetrabutylammonium bromide (TBABr)-Based deep eutectic solvents (DESs) and their physical properties","volume":"19","author":"Yusof","year":"2014","journal-title":"Molecules"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"123534","DOI":"10.1016\/j.molliq.2023.123534","article-title":"Chain length and OH-spacing effects on diol-based deep eutectic solvents","volume":"393","author":"Pandian","year":"2024","journal-title":"J. Mol. Liq."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"229365","DOI":"10.1016\/j.jpowsour.2020.229365","article-title":"The construction of a new deep eutectic solvents system based on choline chloride and butanediol: The influence of the hydroxyl position of butanediol on the structure of deep eutectic solvent and supercapacitor performance","volume":"490","author":"Xu","year":"2021","journal-title":"J. Power Sources"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1123","DOI":"10.1021\/jp4115767","article-title":"Microsolvation of 1,4-butanediol: The competition between intra- and intermolecular hydrogen bonding","volume":"118","author":"Bachrach","year":"2014","journal-title":"J. Phys. Chem. A"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"307","DOI":"10.1016\/j.molliq.2018.11.075","article-title":"Supra-molecular structure and rheological aspects of liquid terminal 1,n-diols from ethylene glycol, 1,3-propandiol, 1,4-butanediol to 1,5-pentanediol","volume":"276","author":"Cerar","year":"2019","journal-title":"J. Mol. Liq."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"5581","DOI":"10.1021\/acs.jced.0c00715","article-title":"Viscosity of Choline Chloride-Based Deep Eutectic Solvents: Experiments and Modeling","volume":"65","author":"Aravena","year":"2020","journal-title":"J. Chem. Eng. Data"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"6739","DOI":"10.1021\/acs.jpcb.6b04750","article-title":"Quantum Chemical Insight into the Interactions and Thermodynamics Present in Choline Chloride Based Deep Eutectic Solvents","volume":"120","author":"Wagle","year":"2016","journal-title":"J. Phys. Chem. B"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"549","DOI":"10.1002\/apj.1978","article-title":"Physical properties and intermolecular interaction of eutectic solvents binary mixtures: Reline and ethaline","volume":"11","author":"Mjalli","year":"2016","journal-title":"Asia-Pac. J. Chem. Eng."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"6990","DOI":"10.1021\/acs.jpcb.4c02813","article-title":"60 Years of Betaine 30\u2014From Solvatochromic Discovery to Future Frontiers","volume":"128","author":"Pandian","year":"2024","journal-title":"J. Phys. Chem. B"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"3024","DOI":"10.1021\/jacsau.3c00420","article-title":"Enhanced Dynamics and Charge Transport at the Eutectic Point: A New Paradigm for the Use of Deep Eutectic Solvent Systems","volume":"3","author":"Spittle","year":"2023","journal-title":"JACS Au"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1002\/jlac.19636610102","article-title":"\u00dcber Pyridinium-N-phenol-betaine und ihre Verwendung zur Charakterisierung der Polarit\u00e4t von L\u00f6sungsmitteln","volume":"661","author":"Dimroth","year":"1963","journal-title":"Justus Liebigs Ann. Chem."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"3554","DOI":"10.1021\/j100011a024","article-title":"Dynamic Solvent Effect on Betaine-30 Electron-Transfer Kinetics in Alcohols","volume":"99","author":"Reid","year":"1995","journal-title":"J. Phys. Chem."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"7704","DOI":"10.1021\/jp991549r","article-title":"Computer simulations of the solvatochromism of betaine-30","volume":"103","author":"Mente","year":"1999","journal-title":"J. Phys. Chem. B"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"899","DOI":"10.1021\/jp993444u","article-title":"Solvent and intramolecular effects on the absorption spectrum of betaine-30","volume":"104","author":"Lobaugh","year":"2000","journal-title":"J. Phys. Chem. A"},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"339","DOI":"10.1039\/b500106b","article-title":"Polarity of ionic liquids determined empirically by means of solvatochromic pyridinium N-phenolate betaine dyes","volume":"7","author":"Reichardt","year":"2005","journal-title":"Green Chem."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"4108","DOI":"10.1002\/chem.201604619","article-title":"Exploring the Solvatochromism of Betaine 30 with Ab Initio Tools: From Accurate Gas-Phase Calculations to Implicit and Explicit Solvation Models","volume":"23","author":"Laurent","year":"2017","journal-title":"Chem. Eur. J."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"3946","DOI":"10.1021\/acs.jpclett.4c00734","article-title":"Entropy-Enthalpy Compensation in Electron-Transfer Processes","volume":"15","author":"Burda","year":"2024","journal-title":"J. Phys. Chem. Lett."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"1616","DOI":"10.1021\/acs.joc.1c01979","article-title":"Solvation Effects in Organic Chemistry: A Short Historical Overview","volume":"87","author":"Reichardt","year":"2022","journal-title":"J. Org. Chem."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"2319","DOI":"10.1021\/cr00032a005","article-title":"Solvatochromic Dyes as Solvent Polarity Indicators","volume":"94","author":"Reichardt","year":"1994","journal-title":"Chem. Rev."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"878","DOI":"10.1021\/jp013603l","article-title":"Measuring Intramolecular Charge Transfer via Coherent Generation of THz Radiation","volume":"106","author":"Beard","year":"2002","journal-title":"J. Phys. Chem. A"},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"21782","DOI":"10.1039\/C9CP04343H","article-title":"Investigation of glycerol hydrogen-bonding networks in choline chloride\/glycerol eutectic-forming liquids using neutron diffraction","volume":"21","author":"Turner","year":"2019","journal-title":"Phys. Chem. Chem. Phys."},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"1200","DOI":"10.1063\/1.456176","article-title":"Short-range order in glycerol. A molecular dynamics study","volume":"90","author":"Root","year":"1989","journal-title":"J. Chem. Phys."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"19647","DOI":"10.1021\/jp047676r","article-title":"Dissociation of Hydrogen Chloride and Proton Transfer in Liquid Glycerol: An Ab Initio Molecular Dynamics Study","volume":"108","author":"Zhuang","year":"2004","journal-title":"J. Phys. Chem. B"},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"243","DOI":"10.1016\/S0022-2860(97)00038-0","article-title":"Hydrogen bonding in liquid alcohols: A computer simulation study","volume":"416","author":"Saiz","year":"1997","journal-title":"J. Mol. Struct."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"9397","DOI":"10.1039\/c0cp02136a","article-title":"The structure of glycerol in the liquid state: A neutron diffraction study","volume":"13","author":"Towey","year":"2011","journal-title":"Phys. Chem. Chem. Phys."},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"1261","DOI":"10.1021\/acs.jpcb.7b11224","article-title":"Glycerol Hydrogen-Bonding Network Dominates Structure and Collective Dynamics in a Deep Eutectic Solvent","volume":"122","author":"Faraone","year":"2018","journal-title":"J. Phys. Chem. B"},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"471","DOI":"10.1038\/369471a0","article-title":"Femtosecond solvation dynamics of water","volume":"369","author":"Jimenez","year":"1994","journal-title":"Nature"},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"21383","DOI":"10.1039\/c1cp22554e","article-title":"Molecular motion and ion diffusion in choline chloride based deep eutectic solvents studied by 1H pulsed field gradient NMR spectroscopy","volume":"13","author":"Harris","year":"2011","journal-title":"Phys. Chem. Chem. Phys."},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"4834","DOI":"10.1021\/jp004007e","article-title":"Charge transfer and solvation of betaine-30 in polar solvents\u2014A femtosecond broadband transient absorption study","volume":"105","author":"Kovalenko","year":"2001","journal-title":"J. Phys. Chem. A"},{"key":"ref_66","doi-asserted-by":"crossref","first-page":"98","DOI":"10.1016\/j.molliq.2015.11.032","article-title":"Glycerol-based deep eutectic solvents: Physical properties","volume":"215","author":"Alomar","year":"2016","journal-title":"J. Mol. Liq."},{"key":"ref_67","doi-asserted-by":"crossref","first-page":"1242","DOI":"10.1002\/cphc.200400190","article-title":"Application of hole theory to the viscosity of ionic and molecular liquids","volume":"5","author":"Abbott","year":"2004","journal-title":"ChemPhysChem"},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"1903","DOI":"10.1351\/pac200476101903","article-title":"Pyridinium N-phenolate betaine dyes as empirical indicators of solvent polarity: Some new findings","volume":"76","author":"Reichardt","year":"2004","journal-title":"Pure Appl. Chem."},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"890","DOI":"10.1021\/acs.jpcb.1c09227","article-title":"Dynamics of Glyceline and Interactions of Constituents: A Multitechnique NMR Study","volume":"126","author":"Fraenza","year":"2022","journal-title":"J. Phys. Chem. B"},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"2924","DOI":"10.1021\/acs.jpclett.5b01192","article-title":"Differential Microscopic Mobility of Components within a Deep Eutectic Solvent","volume":"6","author":"Wagle","year":"2015","journal-title":"J. Phys. Chem. Lett."},{"key":"ref_71","doi-asserted-by":"crossref","first-page":"139485","DOI":"10.1016\/j.chemosphere.2023.139485","article-title":"Physicochemical and thermal characteristics of choline chloride-based deep eutectic solvents","volume":"338","author":"Sazali","year":"2023","journal-title":"Chemosphere"},{"key":"ref_72","doi-asserted-by":"crossref","first-page":"113110","DOI":"10.1016\/j.molliq.2020.113110","article-title":"Experimental and predicted physicochemical properties of monopropanolamine-based deep eutectic solvents","volume":"309","author":"Nowosielski","year":"2020","journal-title":"J. Mol. Liq."},{"key":"ref_73","doi-asserted-by":"crossref","first-page":"29","DOI":"10.1002\/anie.196500291","article-title":"Empirical Parameters of the Polarity of Solvents","volume":"4","author":"Reichardt","year":"1965","journal-title":"Angew. Chem. Int. Ed. Engl."},{"key":"ref_74","doi-asserted-by":"crossref","first-page":"30","DOI":"10.1002\/ange.19650770105","article-title":"Empirische Parameter der L\u00f6sungsmittelpolarit\u00e4t","volume":"77","author":"Reichardt","year":"1965","journal-title":"Angew. Chem."},{"key":"ref_75","doi-asserted-by":"crossref","first-page":"4188","DOI":"10.1063\/1.460774","article-title":"Dynamic solvent effects on electron transfer rates in the inverted regime: Ultrafast studies on the betaines","volume":"95","author":"Walker","year":"1991","journal-title":"J. Chem. 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