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Zeng JJ, Liao YH, An Y, Zhao B, Tang XB, Han S, Zhang W, Lu J. BF 3 Complexing Phosphate/Phosphonate Ionic Liquids: Synthesis, Characterization and Thermophysical Properties. Chemphyschem 2024; 25:e202400052. [PMID: 38629246 DOI: 10.1002/cphc.202400052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 03/14/2024] [Indexed: 05/29/2024]
Abstract
A new group of BF3 complexing phosphate/phosphonate ionic liquids (ILs) [Emim][X(BF3)2] (X=dimethyl phosphate, diethyl phosphate, methyl phosphonate, and ethyl phosphonate) were synthesized and characterized. Key thermophysical properties of the new complex ionic liquids, including density, viscosity, conductivity, surface tension, solid-liquid phase transition, and thermal stability were determined and compared with those of [Emim][X]. Some other important thermophysical properties such as isobaric thermal expansion coefficient, molecular volume, standard molar entropy, and lattice potential energy were obtained from measured density data, and the free volume was estimated by a linear equation presented in this article, while critical temperature, normal boiling temperature, and enthalpy of vaporization were estimated from measured surface tension and density data. Furthermore, Fragility study shows that [Emim][X(BF3)2] should be considered as fragile liquids, while [Emim][X] could be considered as extremely fragile liquids. The ionicity of [Emim][X(BF3)2] was predicted by Walden rule, and the result shows that these ILs fit well with Walden law. The key features of these complex ILs are their extremely low glass transition (-95.33~-98.46 °C) without melting, considerably low viscosities (33.876~58.117 mPa ⋅ s), and high values of free volume fraction (comparable to [Omim][BF4], [Emim][NTf2], and [Emim][TCB]).
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Affiliation(s)
- Ji-Jun Zeng
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an, 710065, China Tel numbers
| | - Yuan-Hao Liao
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an, 710065, China Tel numbers
| | - Yu An
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an, 710065, China Tel numbers
| | - Bo Zhao
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an, 710065, China Tel numbers
| | - Xiao-Bo Tang
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an, 710065, China Tel numbers
| | - Sheng Han
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an, 710065, China Tel numbers
| | - Wei Zhang
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an, 710065, China Tel numbers
| | - Jian Lu
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an, 710065, China Tel numbers
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2
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Banerjee P, Pal P, Ghosh A, Mandal TK. Ion transport and relaxation in phosphonium poly(ionic liquid) homo‐ and
co‐polymers. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Palash Banerjee
- School of Chemical Sciences Indian Association for the Cultivation of Science Jadavpur Kolkata India
| | - Pulak Pal
- School of Chemical Sciences Indian Association for the Cultivation of Science Jadavpur Kolkata India
| | - Aswini Ghosh
- School of Physical Sciences Indian Association for the Cultivation of Science Jadavpur Kolkata India
| | - Tarun K. Mandal
- School of Chemical Sciences Indian Association for the Cultivation of Science Jadavpur Kolkata India
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3
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Lee KL, Feld J, Hume P, Söhnel T, Leitao E. The Synthesis and Mechanistic Considerations of a Series of Ammonium Monosubstituted H-Phosphonate Salts. Chemistry 2021; 27:815-824. [PMID: 32830385 DOI: 10.1002/chem.202003090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 08/01/2020] [Indexed: 11/11/2022]
Abstract
A series of ammonium monosubstituted H-phosphonate salts were synthesized by combining H-phosphonate diesters with amines in the absence of solvent at 80 °C. Variation of the ester substituent and amine produced a range of ionic liquids with low melting points. The products and by-products were analyzed by spectroscopic and spectrometric techniques in order to get a better mechanistic picture of the dealkylation and formal dearylation observed. For dialkyl H-phosphonate diesters, (RO)2 P(O)H (R=alkyl), the reaction proceeds via direct dealkylation with the reactivity increasing in the order R=iPr<Et<Me corresponding to DFT calculated activation enthalpies of 22.6, 20.8, and 17.9 kcal mol-1 . For the diphenyl H-phosphonate diesters, (PhO)2 P(O)H, the dearylation was found to proceed via phenol-assisted formation of a 5-coordinate intermediate, (PhO)3 PH(OH), from which P(OPh)3 and water were eliminated. The presence of an equivalent of water then facilitated the formation of P(OH)2 OPh and the amine, R'NH2 , subsequently abstracted a proton from it to yield [(PhO)PH(O)O]- [R'NH3 ]+ .
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Affiliation(s)
- Keng Lung Lee
- School of Chemical Sciences, University of Auckland, Private Bag, 92019, Auckland, 1142, New Zealand.,The MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand
| | - Joey Feld
- School of Chemical Sciences, University of Auckland, Private Bag, 92019, Auckland, 1142, New Zealand
| | - Paul Hume
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand.,School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand
| | - Tilo Söhnel
- School of Chemical Sciences, University of Auckland, Private Bag, 92019, Auckland, 1142, New Zealand.,The MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand
| | - Erin Leitao
- School of Chemical Sciences, University of Auckland, Private Bag, 92019, Auckland, 1142, New Zealand.,The MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand
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4
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Dang T, Nizamov IS, Salikhov RZ, Sabirzyanova LR, Vorobev VV, Burganova TI, Shaidoullina MM, Batyeva ES, Cherkasov RA, Abdullin TI. Synthesis and characterization of pyridoxine, nicotine and nicotinamide salts of dithiophosphoric acids as antibacterial agents against resistant wound infection. Bioorg Med Chem 2018; 27:100-109. [PMID: 30503413 DOI: 10.1016/j.bmc.2018.11.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/29/2018] [Accepted: 11/13/2018] [Indexed: 01/17/2023]
Abstract
The pyridine-derived biomolecules are of considerable interest in developing medicinal compounds with various specific activities. Novel ammonium salts of pyridoxine, (S)-(-)-nicotine and nicotinamide with O,O-diorganyl dithiophosphoric acids (DTPA) were synthesized and characterized. The complexation of chiral monoterpenyl DTPA, including (S)-(-)-menthyl, (R)-(+)-menthyl, (1R)-endo-(+)-fenchyl, (1S,2S,3S,5R)-(+)-isopinocampheolyl derivatives, with pyridoxine and nicotine provided effective antibacterial compounds 3a,b,e,f, and 5a,b,d,f with MIC values against Gram-positive bacteria as low as 10 µM (6 µg/mL). Two selected pyridoxine and nicotine salts based on menthyl DTPA 3a and 5a were similarly active against antibiotic-resistant bacteria from burn wounds including MRSA. The compounds had enhanced amphiphilic and hemolytic properties and effectively altered surface characteristics and matrix-secreting ability of P. aeroginosa and S. aureus. MBC/MIC ratios of 3a and 5a suggested the bactericidal mode of their action. Furthermore, the compounds exhibited moderate cytotoxicity towards human skin fibroblasts (IC50 = 48.6 and 57.6 µM, respectively, 72 h), encouraging their further investigation as potential antimicrobials against skin and wound infections.
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Affiliation(s)
- Trinh Dang
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Ilyas S Nizamov
- Alexander Butlerov Institute of Chemistry, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia; A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov St., 420088 Kazan, Russia.
| | - Ramazan Z Salikhov
- Alexander Butlerov Institute of Chemistry, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Leysan R Sabirzyanova
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Vyacheslav V Vorobev
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | | | | | - Elvira S Batyeva
- A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov St., 420088 Kazan, Russia
| | - Rafael A Cherkasov
- Alexander Butlerov Institute of Chemistry, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Timur I Abdullin
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia.
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Chiappe C, Margari P, Mezzetta A, Pomelli CS, Koutsoumpos S, Papamichael M, Giannios P, Moutzouris K. Temperature effects on the viscosity and the wavelength-dependent refractive index of imidazolium-based ionic liquids with a phosphorus-containing anion. Phys Chem Chem Phys 2018; 19:8201-8209. [PMID: 28263333 DOI: 10.1039/c6cp08910k] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A systematic study on the viscosity and refractive index of 1-alkyl-3-methylimidazolium based ionic liquids (alkyl = methyl, butyl and hexyl) combined with three phosphorus containing anions, i.e. dimethylphosphate, methyl methylphosphonate and methylphosphonate, is reported. Experimental measurements account for temperature effects, while the refractive index is determined at multiple wavelengths in the visible and near infrared region. Despite the structural similarity of these anions, significant differences in the physical properties of the resulting ILs are identified, along with the clear trend of viscosity increase - and refractive index decrease - with increasing alkyl chain length on the cation. Ab initio theoretical calculations are carried out to support and rationalise the observed behaviour.
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Affiliation(s)
- C Chiappe
- Dipartimento di Farmacia, Università di Pisa, via Bonanno 33, 56126 Pisa, Italy
| | - P Margari
- Dipartimento di Farmacia, Università di Pisa, via Bonanno 33, 56126 Pisa, Italy
| | - A Mezzetta
- Dipartimento di Farmacia, Università di Pisa, via Bonanno 33, 56126 Pisa, Italy
| | - C S Pomelli
- Dipartimento di Farmacia, Università di Pisa, via Bonanno 33, 56126 Pisa, Italy
| | - S Koutsoumpos
- Laboratory of Electronic Devices and Materials, Department of Electronic Engineering, Technological Educational Institute of Athens, Athens, Greece.
| | - M Papamichael
- Laboratory of Electronic Devices and Materials, Department of Electronic Engineering, Technological Educational Institute of Athens, Athens, Greece.
| | - P Giannios
- Laboratory of Electronic Devices and Materials, Department of Electronic Engineering, Technological Educational Institute of Athens, Athens, Greece.
| | - K Moutzouris
- Laboratory of Electronic Devices and Materials, Department of Electronic Engineering, Technological Educational Institute of Athens, Athens, Greece.
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6
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Akhmadishina RA, Kuznetsova EV, Sadrieva GR, Sabirzyanova LR, Nizamov IS, Akhmedova GR, Nizamov ID, Abdullin TI. Glutathione salts of O,O-diorganyl dithiophosphoric acids: Synthesis and study as redox modulating and antiproliferative compounds. Peptides 2018; 99:179-188. [PMID: 28993278 DOI: 10.1016/j.peptides.2017.10.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/16/2017] [Accepted: 10/05/2017] [Indexed: 01/23/2023]
Abstract
Reactions of glutathione (GSH) with O,O-diorganyl dithiophosphoric acids (DTPA) were studied to develop bioactive derivatives of GSH. Effective coupling reaction of GSH with DTPA was proposed to produce the ammonium dithiophosphates (GSH-DTPA) between the NH2 group in γ-glutamyl residue of GSH and the SH group in DTPA. A series of the GSH-DTPA salts based on O-alkyl or O-monoterpenyl substituted DTPA were synthesized. Enhanced radical scavenging activity of the GSH-DTPA over GSH was established with the use of DPPH assay and improved fluorescent assay which utilizes Co/H2O2 Fenton-like reaction. Similarly to GSH, the dithiophosphates induced both pro- and antioxidant effects in vitro attributed to different cellular availability of the compounds. Whereas extracellularly applied GSH greatly stimulated proliferation of cancer cells (PC-3, vinblastine-resistant MCF-7 cells), the GSH-DTPA exhibited antiproliferative activity, which was pronounced for the O-menthyl and O-isopinocampheolyl substituted compounds 3d and 3e (IC50≥1μM). Our results show that the GSH-DTPA are promising redox modulating and antiproliferative compounds. The approach proposed can be extended to modification and improvement of bioactivity of various natural and synthetic peptides.
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Affiliation(s)
- Rezeda A Akhmadishina
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Elena V Kuznetsova
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Gulnaz R Sadrieva
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Leysan R Sabirzyanova
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Ilyas S Nizamov
- Alexander Butlerov Institute of Chemistry, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia.
| | - Gulnaz R Akhmedova
- Alexander Butlerov Institute of Chemistry, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Ilnar D Nizamov
- Alexander Butlerov Institute of Chemistry, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia
| | - Timur I Abdullin
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, 18 Kremlyovskaya St., Russia.
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7
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Abstract
Vibrational spectroscopy has continued use as a powerful tool to characterize ionic liquids since the literature on room temperature molten salts experienced the rapid increase in number of publications in the 1990's. In the past years, infrared (IR) and Raman spectroscopies have provided insights on ionic interactions and the resulting liquid structure in ionic liquids. A large body of information is now available concerning vibrational spectra of ionic liquids made of many different combinations of anions and cations, but reviews on this literature are scarce. This review is an attempt at filling this gap. Some basic care needed while recording IR or Raman spectra of ionic liquids is explained. We have reviewed the conceptual basis of theoretical frameworks which have been used to interpret vibrational spectra of ionic liquids, helping the reader to distinguish the scope of application of different methods of calculation. Vibrational frequencies observed in IR and Raman spectra of ionic liquids based on different anions and cations are discussed and eventual disagreements between different sources are critically reviewed. The aim is that the reader can use this information while assigning vibrational spectra of an ionic liquid containing another particular combination of anions and cations. Different applications of IR and Raman spectroscopies are given for both pure ionic liquids and solutions. Further issues addressed in this review are the intermolecular vibrations that are more directly probed by the low-frequency range of IR and Raman spectra and the applications of vibrational spectroscopy in studying phase transitions of ionic liquids.
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Affiliation(s)
- Vitor H Paschoal
- Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil
| | - Luiz F O Faria
- Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil
| | - Mauro C C Ribeiro
- Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil
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8
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Zhang Z, Wang L, Xuan X. The CN⋯C–X σ-hole interaction acts as a conformational lock. NEW J CHEM 2017. [DOI: 10.1039/c6nj02622b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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9
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Ionic conductivities of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide. ELECTROCHEMISTRY 2016. [DOI: 10.1007/978-3-642-02723-9_635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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10
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Ionic conductivities of 1-ethyl-3-methylimidazolium methylphosphonate. ELECTROCHEMISTRY 2016. [DOI: 10.1007/978-3-642-02723-9_611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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11
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Ionic conductivities of 1-ethyl-3-methylimidazolium ethylphosphonate. ELECTROCHEMISTRY 2016. [DOI: 10.1007/978-3-642-02723-9_593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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12
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Ionic conductivities of 1-methyl-3-methylimidazolium methylphosphonate. ELECTROCHEMISTRY 2016. [DOI: 10.1007/978-3-642-02723-9_469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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13
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Ionic conductivities of 1-ethyl-3-methylimidazolium tetrafluoroborate. ELECTROCHEMISTRY 2016. [DOI: 10.1007/978-3-642-02723-9_543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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14
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Dubnikova F, Zeiri Y. Structure, Energies, and Vibrational Frequencies of Solvated Li+ in Ionic Liquids: Role of Cation Type. J Phys Chem A 2015; 120:3079-87. [DOI: 10.1021/acs.jpca.5b10588] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Faina Dubnikova
- The
Fritz Haber Research Center for Molecular Dynamics, The Institute
of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Yehuda Zeiri
- Division
of Chemistry, NRCN, P.O. Box 9001, Beer-Sheva 84190, Israel
- Biomedical
Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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15
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Jiménez AE, Rossi A, Fantauzzi M, Espinosa T, Arias-Pardilla J, Martínez-Nicolás G, Bermúdez MD. Surface coating from phosphonate ionic liquid electrolyte for the enhancement of the tribological performance of magnesium alloy. ACS APPLIED MATERIALS & INTERFACES 2015; 7:10337-10347. [PMID: 25905426 DOI: 10.1021/acsami.5b01167] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A chronoamperometric method has been applied for the growth of a surface coating on AZ31B magnesium alloy, using the imidazolium alkylphosphonate room-temperature ionic liquid 1-ethyl-3-methylimidazolium ethylphosphonate ([EMIM][EtPO3H]) as electrolyte. A surface coating layer is obtained after 4 h under a constant voltage bias of -0.8 V with respect to the standard electrode. The coating nucleation and growth process correlates well with a 3D progressive mechanism. X-ray photoelectron spectrometry (XPS) analysis of [EMIM][EtPO3H] shows new P 2p and O 1s peaks after its use as electrolyte, as a consequence of reaction between the phosphonate anion and the magnesium substrate. Angle-resolved XPS (ARXPS) analysis of [EMIM][EtPO3H] did not show any change in the composition of the surface before and after chronoamperometry, since the sampling depth (1.5 nm at the highest emission angle) is larger than the cation and anion sizes (ca. 7 and 5 Å, respectively). Characterization of the coating was made by scanning electron microscopy (SEM), focussed ion beam SEM, energy dispersive X-ray spectroscopy, XPS, and ARXPS. FIB-SEM shows that the coating presents a mean thickness of 374 (±36) nm and contains magnesium and aluminum phosphates. Linear reciprocating tribological tests under variable load show that the presence of the coating can reduce friction coefficients of the coated AZ31B against steel up to 32% and wear rates up to 90%, with respect to the uncoated alloy.
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Affiliation(s)
- Ana Eva Jiménez
- †Departamento de Ingeniería de Materiales y Fabricación, Universidad Politécnica de Cartagena, 30202 Cartagena, Spain
| | - Antonella Rossi
- ‡Laboratory for Surface Science and Technology, Department of Materials, ETH Zürich, Switzerland, Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
- §Dipartimento di Scienze Chimiche e Geologiche, Cittadella Universitaria di Monserrato, Università degli Studi di Cagliari, I-09100 Cagliari, Italy
| | - Marzia Fantauzzi
- §Dipartimento di Scienze Chimiche e Geologiche, Cittadella Universitaria di Monserrato, Università degli Studi di Cagliari, I-09100 Cagliari, Italy
| | - Tulia Espinosa
- †Departamento de Ingeniería de Materiales y Fabricación, Universidad Politécnica de Cartagena, 30202 Cartagena, Spain
| | - Joaquin Arias-Pardilla
- †Departamento de Ingeniería de Materiales y Fabricación, Universidad Politécnica de Cartagena, 30202 Cartagena, Spain
| | - Ginés Martínez-Nicolás
- †Departamento de Ingeniería de Materiales y Fabricación, Universidad Politécnica de Cartagena, 30202 Cartagena, Spain
| | - María-Dolores Bermúdez
- †Departamento de Ingeniería de Materiales y Fabricación, Universidad Politécnica de Cartagena, 30202 Cartagena, Spain
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16
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Leys J, Tripathi CSP, Glorieux C, Zahn S, Kirchner B, Longuemart S, Lethesh KC, Nockemann P, Dehaen W, Binnemans K. Electrical conductivity and glass formation in nitrile-functionalized pyrrolidinium bis(trifluoromethylsulfonyl)imide ionic liquids: chain length and odd-even effects of the alkyl spacer between the pyrrolidinium ring and the nitrile group. Phys Chem Chem Phys 2015; 16:10548-57. [PMID: 24740743 DOI: 10.1039/c4cp00259h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The electrical conductivity of a series of pyrrolidinium bis(trifluoromethylsulfonyl)imide ionic liquids, functionalized with a nitrile (cyano) group at the end of an alkyl chain attached to the cation, was studied in the temperature range between 173 K and 393 K. The glass formation of the ionic liquids is influenced by the length of the alkyl spacer separating the nitrile function from the pyrrolidinium ring. The electrical conductivity and the viscosity do not show a monotonic dependence on the alkyl spacer length, but rather an odd-even effect. An explanation for this behavior is given, including the potential energy landscape picture for the glass transition.
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Affiliation(s)
- Jan Leys
- KU Leuven, Laboratorium voor Akoestiek en Thermische Fysica, Departement Natuurkunde en Sterrenkunde, Celestijnenlaan 200D bus 2416, 3001 Leuven, Belgium.
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17
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Yaghini N, Pitawala J, Matic A, Martinelli A. Effect of water on the local structure and phase behavior of imidazolium-based protic ionic liquids. J Phys Chem B 2015; 119:1611-22. [PMID: 25548901 DOI: 10.1021/jp510691e] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We report on the effect of water on local structure and phase behavior of two protic ionic liquids, C2HImTFSI and C2HImTfO. Raman and infrared spectroscopy are employed to investigate the local coordination state. We find that water interacts weakly with TFSI(-) while more specifically with TfO(-) through the -SO3 group. Additionally, we observe that upon addition of water the -NH stretching frequency does not change in C2HImTFSI, while it red-shifts in C2HImTfO, indicative of different hydrogen bonding configurations. Supported by the appearance of some additional features in the 800-1000 cm(-1) frequency range where ring out-of-plane bending (γ) modes are found, we hypothesize that in C2HImTFSI water interacts only with the cation coordinating to the ring C(2)H and the N(3)H sites, while it interacts with both cation and anion in C2HImTfO forming hydrogen bonds that involve the cationic N-H site as well as the anionic -SO3 group. These different local structures also reflect in the phase behavior investigated by DSC, which reveals a more homogeneous solution when water is added to C2HImTfO, as compared to H2O/C2HImTFSI mixtures. Finally we report that the addition of water also significantly affects both Tm and Tg.
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Affiliation(s)
- Negin Yaghini
- Department of Chemistry and Chemical Engineering and §Department of Applied Physics, Chalmers University of Technology , 41296 Gothenburg, Sweden
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18
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Conformational Changes and Phase Behaviour in the Protic Ionic Liquid 1-Ethylimidazolium Bis(trifluoromethylsulfonyl)imide in the Bulk and Nano-Confined State. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402496] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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19
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Vibhute AM, Sureshan KM. Strength from Weakness: Conformational Divergence between Solid and Solution States of Substituted Cyclitols Facilitated by CH···O Hydrogen Bonding. J Org Chem 2014; 79:4892-908. [DOI: 10.1021/jo5004778] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Amol M. Vibhute
- School
of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Thiruvananthapuram, Kerala 695016, India
| | - Kana M. Sureshan
- School
of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Thiruvananthapuram, Kerala 695016, India
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Hu Z, Vatamanu J, Borodin O, Bedrov D. A molecular dynamics simulation study of the electric double layer and capacitance of [BMIM][PF6] and [BMIM][BF4] room temperature ionic liquids near charged surfaces. Phys Chem Chem Phys 2013; 15:14234-47. [DOI: 10.1039/c3cp51218e] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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