1
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Gao H, Wang J, Liu M, Wang S, Li W, An Q, Li K, Wei L, Han C, Zhai S. Enhanced oxidative depolymerization of lignin in cooperative imidazolium-based ionic liquid binary mixtures. BIORESOURCE TECHNOLOGY 2022; 357:127333. [PMID: 35598774 DOI: 10.1016/j.biortech.2022.127333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 05/13/2022] [Accepted: 05/14/2022] [Indexed: 06/15/2023]
Abstract
The aerobic oxidation of lignin model 2-phenoxyacetophenone (2-PAP) in cooperative ionic liquid mixtures (CoILs) with 1-ethyl-3-methylimidazolium acetate ([C2C1im]OAc) and 1-benzyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BZC1im]NTf2) was investigated. Complete degradation of 2-PAP was achieved with [C2C1im]OAc/[BZC1im]NTf2 molar ratio (RIL) of 1/1 and 1/2 at 100 °C for 2 h. The conversion and product yields from CoILs were higher than those in pure ILs, indicating the cooperative effects of [C2C1im]OAc/[BZC1im]NTf2 on cleaving aryl-ether bonds. [C2C1im]OAc promoted the catalytic cleavage of aryl-ether bonds and solvation, and [BZC1im]NTf2 induced the formation of alkyl radicals and enhanced the product selectivity. Accordingly, the highest conversion of alkali lignin (79.8%) was obtained with RIL of 5/1 at 100 °C for 2 h, and phenol monomers (306 mg/g) were selectively produced. The CoILs exhibited good catalytic capacities for oxidative depolymerization of lignin, which strongly depends on the changes in intermolecular interactions and structural organization with varying RIL.
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Affiliation(s)
- Hailian Gao
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jiebin Wang
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Meixuan Liu
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Shunxin Wang
- School of Bioengineering, Dalian Polytechnic University, Dalian 116034, China
| | - Wenbo Li
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Qingda An
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China; Liaoning Key Laboratory of Lignocellulosic Chemistry and Biomaterials, Dalian Polytechnic University, Dalian 116034, China
| | - Kunlan Li
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Ligang Wei
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
| | - Chi Han
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Shangru Zhai
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China; Liaoning Key Laboratory of Lignocellulosic Chemistry and Biomaterials, Dalian Polytechnic University, Dalian 116034, China
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2
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Abdurrokhman I, Martinelli A. Binary Mixtures of Imidazolium-Based Protic Ionic Liquids. Extended Temperature Range of the Liquid State Keeping High Ionic Conductivities. Front Chem 2022; 10:915683. [PMID: 35844661 PMCID: PMC9283952 DOI: 10.3389/fchem.2022.915683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 05/20/2022] [Indexed: 11/13/2022] Open
Abstract
Binary mixtures based on the two protic ionic liquids 1-ethylimidazolium triflate ([C2HIm][TfO]) and 1-ethylimidazolium bis(trifluoromethanesulfonyl)imide ([C2HIm][TFSI]) have been investigated, with focus on phase behavior, ionic conductivity, and intermolecular interactions as a function of composition (χTFSI indicating the mole fraction of the added compound). It is found that on addition of [C2HIm][TFSI] to [C2HIm][TfO], the melting temperature is first decreased (0 <χ≤ 0.3) and then suppressed (0.3 <χ≤ 0.8) resulting in mixtures with no phase transitions. These mixtures display a wide temperature range of the liquid state and should be interesting for use in devices operating at extreme temperatures. The ionic conductivity does not vary significantly across the composition range analyzed, as evidenced in the comparative Arrhenius plot. The activation energy, Ea, estimated by fitting with the Arrhenius relation in a limited temperature range (between 60 and 140 °C) varies marginally and keeps values between 0.17 and 0.21 eV. These marginal differences can be rationalized by the initially very similar values of the two neat protic ionic liquids. Vibrational spectroscopy, including both Raman and infrared spectroscopies, reveals weakening of the cation–anion interactions for increasing content of [C2HIm][TFSI], which is reflected by the blue shift of the average N-H stretching mode and the red shift of the S-O stretching mode in the TfO anion. These trends correlate with the higher disorder in the mixtures observed by DSC and are evidenced by the decrease and suppression of the melting temperature as the amount of [C2HIm][TFSI] is increased.
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Curnow OJ, Senthooran R. Highly-fluorinated Triaminocyclopropenium Ionic Liquids. Chem Asian J 2022; 17:e202200139. [PMID: 35239986 PMCID: PMC9314049 DOI: 10.1002/asia.202200139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/02/2022] [Indexed: 11/27/2022]
Abstract
A series of highly‐fluorinated triaminocyclopropenium salts, with up to six fluorous groups, were prepared and their properties as ionic liquids investigated. Reaction of pentachlorocyclopropane or tetrachlorocyclopropene with bis(2,2,2‐trifluoroethyl)amine, HN(CH2CF3)2, occurs in the presence of a trialkylamine, NR3, to give cations with two fluorinated amino groups, [C3(N(CH2CF3)2)2(NR2)]+ (R=Et, Pr, Bu, Hex), with traces of [C3(N(CH2CF3)2)3]+. Use of appropriate reagent ratios and reaction times and subsequent addition of a dialkylamine, HNR'R”, gives cations with one fluorinated amino group, [C3(N(CH2CF3)2)(NR2)(NR'R”)]+ ((NR2)(NR'R”)=(NBu2)2, (NEt2)(NPr2), (NBu2)(NBuMe)). These cations were isolated as chloride salts and some of these were converted to bistriflamide, dicyanamide and triflate salts to provide ionic liquids. These salts were characterised by thermal (DSC and TGA) measurements and miscibility/solubility properties (determined in a range of solvents). Ionic liquids (ILs) were also characterised by density, viscosity and conductivity measurements where possible. X‐ray diffraction studies of chloride salts showed the formation of fluorous regions and more hydrophilic ionic regions in the solid state.
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Affiliation(s)
- Owen John Curnow
- University of Canterbury, Department of Chemistry, Private Bag 4800, 8002, Christchurch, NEW ZEALAND
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4
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Morales S, Pastenes C, Machado VG, Rezende MC. Applications of a preferential–solvation index (PSI) for the comparison of binary mixtures with ionic liquids. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117644] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Synthetic auxin-based double salt ionic liquids as herbicides with improved physicochemical properties and biological activity. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116452] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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6
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Marullo S, D'Anna F, Rizzo C, Billeci F. Ionic liquids: "normal" solvents or nanostructured fluids? Org Biomol Chem 2021; 19:2076-2095. [PMID: 33606870 DOI: 10.1039/d0ob02214d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Ionic liquids (ILs) are a class of non-conventional solvents, which, for almost two decades, have continued to generate burgeoning interest in different fields of present-day chemical research with few similar precedents. Among the various aspects related to ILs, a topic worthy of in-depth analysis is their influence on organic reactivity and reaction rates. In light of this, the present short review aims to provide an overview of the literature from 2010 to the present day that addresses this issue. In particular, we herein present two main different viewpoints by which the solvent effect of ILs is explained: the first is mainly based on considering the bulk polarity of ILs and linear solvation energy relationships, while the other treats ILs as nanostructured fluids. In both cases, studies dealing with IL mixtures are also covered. Finally, literature addressing the area of supramolecular catalysis "by" or "in" ILs is also reported. This is one of the few reviews covering these specific aspects, aiming to provide a useful framework to guide future research into the effects of ILs on organic reactivity.
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Affiliation(s)
- Salvatore Marullo
- Università degli Studi di Palermo, Dipartimento STEBICEF, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy.
| | - Francesca D'Anna
- Università degli Studi di Palermo, Dipartimento STEBICEF, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy.
| | - Carla Rizzo
- Università degli Studi di Palermo, Dipartimento STEBICEF, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy.
| | - Floriana Billeci
- Università degli Studi di Palermo, Dipartimento STEBICEF, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy.
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7
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Wang X, Huang Y, Li L, Huang L, Chen X, Yang Z. Molecular-level insights into composition-dependent structure, dynamics, and hydrogen bonds of binary ionic liquid mixture from molecular dynamics simulations. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2020.111051] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Frenna V, Lo Meo P, Palumbo Piccionello A, Spinelli D. Unexpected Substituent Effects in the Iso-Heterocyclic Boulton-Katritzky Rearrangement of 3-Aroylamino-5-methyl-1,2,4-oxadiazoles: A Mechanistic Study. J Phys Chem A 2019; 123:10004-10010. [PMID: 31619037 DOI: 10.1021/acs.jpca.9b08675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The kinetics of the iso-heterocyclic mononuclear rearrangement of some 3-aroylamino-5-methyl-1,2,4-ozadiazoles was carefully examined under largely variable acidic or alkaline conditions. This reaction may proceed via two different mechanistic pathways (an uncatalyzed and a base-catalyzed one), as accounted for also by the evaluation of the relevant activation parameters. Substituent effects, as quantified by means of the Hammett's equation, appear relatively modest; however, they reveal some interesting anomalies, which enabled us to draw a very precise picture of the intimate reaction course.
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Affiliation(s)
- Vincenzo Frenna
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF) , Università degli Studi di Palermo , V.le delle Scienze pad. 17 , 90128 Palermo , Italy
| | - Paolo Lo Meo
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF) , Università degli Studi di Palermo , V.le delle Scienze pad. 17 , 90128 Palermo , Italy
| | - Antonio Palumbo Piccionello
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF) , Università degli Studi di Palermo , V.le delle Scienze pad. 17 , 90128 Palermo , Italy
| | - Domenico Spinelli
- Department of Chemistry "G. Ciamician" , Alma Mater Studiorum, Università di Bologna , Via Selmi 2 , 40126 Bologna , Italy
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9
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Rahman A, Rahman MM, Mollah MYA, Susan MABH. Ultraslow Relaxation in Aprotic Double Salt Ionic Liquids. J Phys Chem B 2019; 123:5577-5587. [PMID: 31184890 DOI: 10.1021/acs.jpcb.9b03964] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A mixture of two pure ionic liquids (ILs) or double salt ILs (DSILs) can push the limits of ILs in terms of unraveling their unique physicochemical properties and potential in clean technology. While the correlated ion dynamics and heterogeneity in the bulk of pure ILs have been reported, such a phenomenon at longer timescales in DSILs has never been elucidated. Here, a combination of temperature-dependent polarized dynamic light scattering and rheological measurements has been employed to reveal the presence of structural and ultraslow relaxation in three DSILs, each containing a 1-ethyl-3-methylimidazolium cation and two different anions. The slow relaxation caused by Brownian diffusion of cluster-like arrangements occurs at a timescale of a few to several hundred milliseconds; both the relaxation processes, nevertheless, are Arrhenius in nature. Notably, slow relaxation in the DSILs is much different compared to that in the pure ILs. The decay of intensity correlation functions (ICFs) and average hydrodynamic correlation length of the clusters and their response to temperature markedly vary with the nature of the two anions present in the DSILs. Stretched exponential analyses of the ICFs disclose the cluster-to-cluster transfer of ionic species as well as percolation dynamics among clusters. The identity of anions also governs whether the DSILs follow or violate the Stokes-Einstein relationship or not.
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Affiliation(s)
- Adhip Rahman
- Material Chemistry Research Laboratory, Department of Chemistry , University of Dhaka , Dhaka 1000 , Bangladesh
| | - M Muhibur Rahman
- Material Chemistry Research Laboratory, Department of Chemistry , University of Dhaka , Dhaka 1000 , Bangladesh
| | | | - Md Abu Bin Hasan Susan
- Material Chemistry Research Laboratory, Department of Chemistry , University of Dhaka , Dhaka 1000 , Bangladesh
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10
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Xiao Y, Huang X. The physicochemical properties of a room-temperature liquidus binary ionic liquid mixture of [HNMP][CH 3SO 3]/[Bmim]Cl and its application for fructose conversion to 5-hydroxymethylfurfural. RSC Adv 2018; 8:18784-18791. [PMID: 35539654 PMCID: PMC9080599 DOI: 10.1039/c8ra03604g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 05/17/2018] [Indexed: 11/29/2022] Open
Abstract
Via heating first and then cooling, binary ionic liquid (IL) mixture of N-methyl-2-pyrrolidonium methylsulfonate ([HNMP][CH3SO3]) and 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) could form a liquid at room temperature. The glass-transition temperature (T g) characterized by DSC depends on its composition with T g being as low as -63 °C. The physicochemical properties of the binary IL mixtures also vary with the composition. With the increase of the mole fraction of [Bmim]Cl, the hydrogen-bond accepting ability (β) of the binary IL mixture increases, but the hydrogen-bond donating ability (α) deceases. In this binary IL mixture, fructose could be effectively converted into 5-hydroxymethylfurfural (HMF) at room temperature. The HMF yields at a given time are found to be well correlated with the physicochemical properties of the binary mixture, especially the α and β values. Under specified conditions, the present IL mixture as medium for fructose dehydration into HMF is comparable to the medium formed by ILs and alcohol, where the alcohols have negative effect on the HMF formation.
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Affiliation(s)
- Yuyan Xiao
- Key Lab for Colloid and Interface Chemistry of the Education Ministry of China, Shandong University Jinan 250100 P. R. China
| | - Xirong Huang
- Key Lab for Colloid and Interface Chemistry of the Education Ministry of China, Shandong University Jinan 250100 P. R. China
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11
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Change of hydrogen bonding structure in ionic liquid mixtures by anion type. J Chem Phys 2018; 148:193827. [DOI: 10.1063/1.5010067] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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12
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Toledo Hijo AAC, Maximo GJ, Cunha RL, Fonseca FHS, Cardoso LP, Pereira JFB, Costa MC, Batista EAC, Meirelles AJA. Phase equilibrium and physical properties of biobased ionic liquid mixtures. Phys Chem Chem Phys 2018; 20:6469-6479. [DOI: 10.1039/c7cp06841g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Protic ionic liquid crystals (PILCs) obtained from natural sources are promising compounds due to their peculiar properties and sustainable appeal.
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Affiliation(s)
| | | | | | | | - Lisandro P. Cardoso
- Institute of Physics Gleb Wataghin (IFGW)
- University of Campinas
- Campinas
- Brazil
| | - Jorge F. B. Pereira
- School of Pharmaceutical Sciences
- Universidade Estadual Paulista
- Araraquara
- Brazil
| | - Mariana C. Costa
- School of Chemical Engineering
- University of Campinas
- Campinas
- Brazil
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13
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Alarcón-Espósito J, Contreras R, Campodónico PR. Iso-solvation effects in mixtures of ionic liquids on the kinetics of a model SNAr reaction. NEW J CHEM 2017. [DOI: 10.1039/c7nj03246c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The SNAr reaction between 1-chloro-2,4-dinitrobenzene and morpholine was used as a model system to study solvation effects in a series of mixtures involving imidazolium based ionic liquids.
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Affiliation(s)
- J. Alarcón-Espósito
- Departamento de Química
- Facultad de Ciencias
- Universidad de Chile
- Casilla 653-Santiago
- Chile
| | - R. Contreras
- Departamento de Química
- Facultad de Ciencias
- Universidad de Chile
- Casilla 653-Santiago
- Chile
| | - P. R. Campodónico
- Centro de Química Médica
- Facultad de Medicina
- Clínica Alemana
- Universidad del Desarrollo
- Santiago
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14
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Paterno' A, D'Anna F, Fortuna CG, Musumarra G. Polarity study of ionic liquids with the solvatochromic dye Nile Red: a QSPR approach using in silico VolSurf+ descriptors. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.04.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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15
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Butler BJ, Harper JB. The effect of the structure of the cation of an ionic liquid on the rate of reaction at a phosphorus centre. J PHYS ORG CHEM 2016. [DOI: 10.1002/poc.3554] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bradley J. Butler
- School of Chemistry University of New South Wales, UNSW Sydney 2052 Australia
| | - Jason B. Harper
- School of Chemistry University of New South Wales, UNSW Sydney 2052 Australia
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16
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Cade EA, Petenuci J, Hoffmann MM. Aggregation Behavior of Several Ionic Liquids in Molecular Solvents of Low Polarity-Indication of a Bimodal Distribution. Chemphyschem 2016; 17:520-9. [DOI: 10.1002/cphc.201500990] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 12/08/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Elise A. Cade
- Department of Chemistry and Biochemistry; The College at Brockport; State University of New York; Brockport NY 14420 USA
| | - João Petenuci
- Department of Chemistry and Biochemistry; The College at Brockport; State University of New York; Brockport NY 14420 USA
| | - Markus M. Hoffmann
- Department of Chemistry and Biochemistry; The College at Brockport; State University of New York; Brockport NY 14420 USA
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17
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Marullo S, D'Anna F, Campodonico PR, Noto R. Ionic liquid binary mixtures: how different factors contribute to determine their effect on the reactivity. RSC Adv 2016. [DOI: 10.1039/c6ra12836j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
We studied how mixing ionic liquids affected the rate of the Diels Alder reaction between 9-anthracenemethanol and N-ethylmaleimide.
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Affiliation(s)
- Salvatore Marullo
- Dipartimento STEBICEF-Sezione di Chimica
- Università degli Studi di Palermo
- Palermo
- Italy
| | - Francesca D'Anna
- Dipartimento STEBICEF-Sezione di Chimica
- Università degli Studi di Palermo
- Palermo
- Italy
| | - Paola R. Campodonico
- Centro de Quimica Medica
- Facultad de Medicina
- Clìnica Alemana, Universidad del Desarrollo
- Santiago
- Chile
| | - Renato Noto
- Dipartimento STEBICEF-Sezione di Chimica
- Università degli Studi di Palermo
- Palermo
- Italy
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18
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Matthews RP, Villar-Garcia IJ, Weber CC, Griffith J, Cameron F, Hallett JP, Hunt PA, Welton T. A structural investigation of ionic liquid mixtures. Phys Chem Chem Phys 2016; 18:8608-24. [DOI: 10.1039/c6cp00156d] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The role of hydrogen bonding, π+–π+ stacking and anion–π+ interactions on the structure of ionic liquid mixtures has been elucidated through a combined theoretical and experimental approach.
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Affiliation(s)
| | | | | | | | - Fiona Cameron
- Department of Chemistry
- Imperial College London
- London
- UK
| | - Jason P. Hallett
- Department of Chemistry
- Imperial College London
- London
- UK
- Department of Chemical Engineering
| | | | - Tom Welton
- Department of Chemistry
- Imperial College London
- London
- UK
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19
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D'Anna F, Millan D, Noto R. The ionic liquid effect on the Boulton–Katritzky reaction: a comparison between substrates of different structure. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.05.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Affiliation(s)
- Robert Hayes
- Discipline
of Chemistry, The University of Newcastle, NSW 2308, Callaghan, Australia
| | - Gregory G. Warr
- School
of Chemistry, The University of Sydney, NSW 2006, Sydney, Australia
| | - Rob Atkin
- Discipline
of Chemistry, The University of Newcastle, NSW 2308, Callaghan, Australia
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21
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Marekha BA, Kalugin ON, Bria M, Idrissi A. Probing structural patterns of ion association and solvation in mixtures of imidazolium ionic liquids with acetonitrile by means of relative1H and13C NMR chemical shifts. Phys Chem Chem Phys 2015; 17:23183-94. [DOI: 10.1039/c5cp02748a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Competition between ion solvation and association in mixtures of imidazolium ionic liquids and molecular solvents can be systematically addressed by the analysis of relative chemical shift variation with mixture composition.
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Affiliation(s)
- Bogdan A. Marekha
- University of Lille-Science and Technology
- LASIR (UMR CNRS A8516)
- Villeneuve d'Ascq Cedex
- France
| | - Oleg N. Kalugin
- Department of Inorganic Chemistry
- V.N. Karazin Kharkiv National University
- Kharkiv
- Ukraine
| | - Marc Bria
- University of Lille-Science and Technology
- CCM RMN
- Villeneuve d'Ascq
- France
| | - Abdenacer Idrissi
- University of Lille-Science and Technology
- LASIR (UMR CNRS A8516)
- Villeneuve d'Ascq Cedex
- France
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22
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Stolarska O, Soto A, Rodríguez H, Smiglak M. Properties modification by eutectic formation in mixtures of ionic liquids. RSC Adv 2015. [DOI: 10.1039/c4ra17268j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The composition and temperature of three eutectic mixtures of ionic liquids and their physical properties (density, viscosity, and surface tension) are presented. Melting temperature depressions of up to ca. 50 K were found with regard to those of the parent ionic liquids.
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Affiliation(s)
- Olga Stolarska
- Poznan Science and Technology Park
- Adam Mickiewicz University Foundation
- 61-612 Poznan
- Poland
- Faculty of Chemistry
| | - Ana Soto
- Department of Chemical Engineering
- University of Santiago de Compostela
- Santiago de Compostela
- Spain
| | - Héctor Rodríguez
- Department of Chemical Engineering
- University of Santiago de Compostela
- Santiago de Compostela
- Spain
| | - Marcin Smiglak
- Poznan Science and Technology Park
- Adam Mickiewicz University Foundation
- 61-612 Poznan
- Poland
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23
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Butler BJ, Harper JB. The effect of an ionic liquid on the rate of reaction at a phosphorus centre. NEW J CHEM 2015. [DOI: 10.1039/c4nj01224k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Rate constant of a substitution at phosphorus varies with amount of ionic liquid present; enthalpic benefit offsets entropic cost.
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Affiliation(s)
- Bradley J. Butler
- School of Chemistry
- University of New South Wales
- UNSW Sydney 2052
- Australia
| | - Jason B. Harper
- School of Chemistry
- University of New South Wales
- UNSW Sydney 2052
- Australia
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Pavez P, Millán D, Cocq C, Santos JG, Nome F. Ionic liquids: anion effect on the reaction of O,O-diethyl O-(2,4-dinitrophenyl) phosphate triester with piperidine. NEW J CHEM 2015. [DOI: 10.1039/c4nj02121e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ionic liquids can be considered as designer solvents in the titled reaction because by an appropriate choice of the anion it is possible to steer the selectivity of this reaction.
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Affiliation(s)
- Paulina Pavez
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - Daniela Millán
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - Cristian Cocq
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - José G. Santos
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - Faruk Nome
- INCT-Catálise, Departamento de Química
- Universidade Federal de Santa Catarina
- Florianópolis
- Brasil
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25
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Alarcón-Espósito J, Tapia RA, Contreras R, Campodónico PR. Changes in the SNAr reaction mechanism brought about by preferential solvation. RSC Adv 2015. [DOI: 10.1039/c5ra20779g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
For model SNAr reactions in mixtures of acetonitrile and water, we found preferential solvation in favor of the aqueous phase.
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Affiliation(s)
| | - Ricardo A. Tapia
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Renato Contreras
- Departamento de Química
- Facultad de Ciencias
- Universidad de Chile
- Casilla 653-Santiago
- Chile
| | - Paola R. Campodónico
- Centro de Química Médica
- Facultad de Medicina
- Clínica Alemana
- Universidad del Desarrollo
- Santiago
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26
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Quantifying the hydrogen-bonding interaction between cation and anion of pure [EMIM][Ac] and evidencing the ion pairs existence in its extremely diluted water solution: Via 13 C, 1 H, 15 N and 2D NMR. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.09.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Vitale P, D'Anna F, Ferrante F, Rizzo C, Noto R. π-Conjugated diimidazolium salts: rigid structure to obtain organized materials. Phys Chem Chem Phys 2015; 17:26903-17. [DOI: 10.1039/c5cp03808a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photophysical properties and aggregation ability of π-conjugated diimidazolium salts were studied in solution and in the solid state. Experimental investigations were supported by DFT calculations.
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Affiliation(s)
- Paola Vitale
- Università degli Studi di Palermo
- Dipartimento STEBICEF
- Sezione di Chimica
- 90128 Palermo
- Italy
| | - Francesca D'Anna
- Università degli Studi di Palermo
- Dipartimento STEBICEF
- Sezione di Chimica
- 90128 Palermo
- Italy
| | - Francesco Ferrante
- Università degli Studi di Palermo
- Dipartimento di Fisica e Chimica
- 90128 Palermo
- Italy
| | - Carla Rizzo
- Università degli Studi di Palermo
- Dipartimento STEBICEF
- Sezione di Chimica
- 90128 Palermo
- Italy
| | - Renato Noto
- Università degli Studi di Palermo
- Dipartimento STEBICEF
- Sezione di Chimica
- 90128 Palermo
- Italy
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28
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Omar S, Lemus J, Ruiz E, Ferro VR, Ortega J, Palomar J. Ionic Liquid Mixtures—An Analysis of Their Mutual Miscibility. J Phys Chem B 2014; 118:2442-50. [DOI: 10.1021/jp411527b] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Salama Omar
- Sección
de Ingeniería Química (Departamento de Química
Física Aplicada), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Jesus Lemus
- Sección
de Ingeniería Química (Departamento de Química
Física Aplicada), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Elia Ruiz
- Sección
de Ingeniería Química (Departamento de Química
Física Aplicada), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Víctor R. Ferro
- Sección
de Ingeniería Química (Departamento de Química
Física Aplicada), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Juan Ortega
- Laboratorio
de Termodinámica y Fisicoquímica de Fluidos, Parque
Científico-Tecnológico, Universidad de Las Palmas de Gran Canaria, Canary Islands, Spain
| | - Jose Palomar
- Sección
de Ingeniería Química (Departamento de Química
Física Aplicada), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
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29
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Anthofer MH, Wilhelm ME, Cokoja M, Markovits IIE, Pöthig A, Mink J, Herrmann WA, Kühn FE. Cycloaddition of CO2 and epoxides catalyzed by imidazolium bromides under mild conditions: influence of the cation on catalyst activity. Catal Sci Technol 2014. [DOI: 10.1039/c3cy01024d] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Pavez P, Millán D, Morales JI, Castro EA, López A. C, Santos JG. Mechanisms of Degradation of Paraoxon in Different Ionic Liquids. J Org Chem 2013; 78:9670-6. [DOI: 10.1021/jo401351v] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paulina Pavez
- Facultad
de Química, Pontificia Universidad
Católica de Chile, Casilla 306, Santiago 6094411, Chile
| | - Daniela Millán
- Facultad
de Química, Pontificia Universidad
Católica de Chile, Casilla 306, Santiago 6094411, Chile
| | - Javiera I. Morales
- Facultad
de Química, Pontificia Universidad
Católica de Chile, Casilla 306, Santiago 6094411, Chile
| | - Enrique A. Castro
- Facultad
de Química, Pontificia Universidad
Católica de Chile, Casilla 306, Santiago 6094411, Chile
| | - Claudio López A.
- Facultad
de Química, Pontificia Universidad
Católica de Chile, Casilla 306, Santiago 6094411, Chile
| | - José G. Santos
- Facultad
de Química, Pontificia Universidad
Católica de Chile, Casilla 306, Santiago 6094411, Chile
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31
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Walton BL, Joshi U, Dzyuba SV, Youngblood WJ, Verbeck GF. Imidazolium salts with varying anions as charge carriers for detection of neutral bis(triphenylphosphine)palladium(II) dichloride in electrospray ionization mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2013; 27:1954-1960. [PMID: 23939962 DOI: 10.1002/rcm.6653] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 06/06/2013] [Accepted: 06/07/2013] [Indexed: 06/02/2023]
Abstract
RATIONALE While electrospray ionization is a popular technique for mass analysis, without a charged species it is ineffective. This coupled with solvent restrictions hinders the analysis of organometallic complexes. Detecting neutral species whose solubility is limited to nonconventional solvents is a problem that can be overcome with the right charge carrier, which is described in this study. METHODS Ionic liquids were synthesized and analyzed by electrospray ionization quadrupole ion trap mass spectrometry. The neutral palladium complex was also analyzed using different imidazolium salts as the charge carrier with the same method and instrumentation. Theoretical complements were also performed using Gaussian 09 at the density functional theory levels, using B3LYP functionals and the 6-31 g (d,p) basis set for geometry optimizations. RESULTS Low concentration imidazolium salts in methanol showed aggregation behavior of the ionic liquid, where the cation peak and [cation](n+1)[anion]n peaks were observed in positive mode, while the [cation]n[anion](n+1) peaks were seen in negative mode. The unbound anion was observed in all the negative mode spectra except for the salt with the SCN anion when in THF. Solutions of PdCl2(PPh3)2 and a small amount of ionic liquid in THF showed the palladium complex adducted with the imidazolium cation for each of the ionic liquids studied. CONCLUSIONS A charge carrier for a neutral organometallic complex was found in imidazolium salts, where the cation was observed as the ionizing agent. Differing ion intensities of the complex-adduct peak resulted from the anions ability to dissociate from the cation.
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Affiliation(s)
- Barbara L Walton
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
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32
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D'Anna F, Nimal Gunaratne HQ, Lazzara G, Noto R, Rizzo C, Seddon KR. Solution and thermal behaviour of novel dicationic imidazolium ionic liquids. Org Biomol Chem 2013; 11:5836-46. [DOI: 10.1039/c3ob40807h] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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34
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Brüssel M, Brehm M, Pensado AS, Malberg F, Ramzan M, Stark A, Kirchner B. On the ideality of binary mixtures of ionic liquids. Phys Chem Chem Phys 2012; 14:13204-15. [DOI: 10.1039/c2cp41926b] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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