1
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Suzuki S, Tanaka R, Shu R, Naota T. Stimuli-Induced Controls of Magnetic and Photophysical Properties Using Liquescent Open-Shell Ionic Molecular Systems. Chempluschem 2024; 89:e202400132. [PMID: 38548656 DOI: 10.1002/cplu.202400132] [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: 02/15/2024] [Revised: 03/28/2024] [Accepted: 03/28/2024] [Indexed: 04/25/2024]
Abstract
This study explores the remarkable properties of liquescent open-shell ionic molecular systems, emphasizing the magnetic and photophysical characteristics arising from their associated structures in the condensed state under various conditions. Well-investigated open-shell molecules, namely, phenothiazine, dihydrophenazine, and tetrathiafulvalene radical cations, and bis(malononitriledithiolato)nickel(III) anionic complexes were examined, and the concept of liquescent open-shell ionic molecular systems was devised. Transformations in their associated structures are induced by external stimuli, resulting in significant variations in their physical properties. These experimental findings open new avenues for exploring and applying stimuli-responsive molecule-based materials.
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Affiliation(s)
- Shuichi Suzuki
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan
| | - Ritsuki Tanaka
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan
| | - Ruifeng Shu
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan
| | - Takeshi Naota
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan
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2
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Figueiredo NM, Voroshylova IV, Ferreira ESC, Marques JMC, Cordeiro MNS. Magnetic Ionic Liquids: Current Achievements and Future Perspectives with a Focus on Computational Approaches. Chem Rev 2024; 124:3392-3415. [PMID: 38466339 PMCID: PMC10979404 DOI: 10.1021/acs.chemrev.3c00678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 02/29/2024] [Accepted: 03/05/2024] [Indexed: 03/12/2024]
Abstract
Magnetic ionic liquids (MILs) stand out as a remarkable subclass of ionic liquids (ILs), combining the desirable features of traditional ILs with the unique ability to respond to external magnetic fields. The incorporation of paramagnetic species into their structures endows them with additional attractive features, including thermochromic behavior and luminescence. These exceptional properties position MILs as highly promising materials for diverse applications, such as gas capture, DNA extractions, and sensing technologies. The present Review synthesizes key experimental findings, offering insights into the structural, thermal, magnetic, and optical properties across various MIL families. Special emphasis is placed on unraveling the influence of different paramagnetic species on MILs' behavior and functionality. Additionally, the Review highlights recent advancements in computational approaches applied to MIL research. By leveraging molecular dynamics (MD) simulations and density functional theory (DFT) calculations, these computational techniques have provided invaluable insights into the underlying mechanisms governing MILs' behavior, facilitating accurate property predictions. In conclusion, this Review provides a comprehensive overview of the current state of research on MILs, showcasing their special properties and potential applications while highlighting the indispensable role of computational methods in unraveling the complexities of these intriguing materials. The Review concludes with a forward-looking perspective on the future directions of research in the field of magnetic ionic liquids.
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Affiliation(s)
- Nádia M. Figueiredo
- LAQV@REQUIMTE,
Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Iuliia V. Voroshylova
- LAQV@REQUIMTE,
Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Elisabete S. C. Ferreira
- LAQV@REQUIMTE,
Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Jorge M. C. Marques
- CQC−IMS,
Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - M. Natália
D. S. Cordeiro
- LAQV@REQUIMTE,
Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
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3
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Mochida T. Organometallic Ionic Liquids Containing Sandwich Complexes: Molecular Design, Physical Properties, and Chemical Reactivities. CHEM REC 2023; 23:e202300041. [PMID: 37010446 DOI: 10.1002/tcr.202300041] [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: 01/31/2023] [Revised: 03/15/2023] [Indexed: 04/04/2023]
Abstract
Ionic liquids (ILs) are salts with low melting points and are useful as electrolytes and solvents. We have developed ILs containing cationic metal complexes, which form a family of functional liquids that exhibit unique physical properties and chemical reactivities originating from metal complexes. Our study explores the liquid chemistry in the field of coordination chemistry, where solid-state chemistry is currently the main focus. This review describes the molecular design, physical properties, and reactivities of organometallic ILs containing sandwich or half-sandwich complexes. This paper mainly covers stimuli-responsive ILs, whose magnetic properties, solvent polarities, colors, or structures change by the application of external fields, such as light, heat, and magnetic fields, or by reaction with coordinating molecules.
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Affiliation(s)
- Tomoyuki Mochida
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo, 657-8501, Japan
- Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo, 657-8501, Japan
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4
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Kondo A, Noro SI, Kajiro H, Kanoh H. Structure- and phase-transformable coordination polymers/metal complexes with fluorinated anions. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Mochida T, Qiu Y, Sumitani R, Kimata H, Furushima Y. Incongruent Melting and Vitrification Behaviors of Anionic Coordination Polymers Incorporating Ionic Liquid Cations. Inorg Chem 2022; 61:14368-14376. [PMID: 36018677 DOI: 10.1021/acs.inorgchem.2c02147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Several meltable coordination polymers (CPs) that possess substantial advantages attributable to their high flexibility and processability have been developed recently; however, the melting mechanism and vitrification conditions of these materials are not yet fully understood. In this study, we synthesized meltable CPs [A][K(TCM)2] (A = onium cation, TCM = C(CN)3-) incorporating ionic liquid components and investigated their crystal structures and melting behaviors in detail. These CPs feature two- or three-dimensional anionic [K(TCM)2]n- frameworks incorporating onium cations. Each CP was found to undergo incongruent melting at a temperature between 73 and 192 °C to produce a heterogeneous mixture of the ionic liquid ([A][TCM]) and microcrystalline K[TCM]. Furthermore, they formed homogeneous liquids upon further heating to ∼240 °C. The melting points of these CPs were linearly correlated with those of their constituent ionic liquids. The vitrification of these materials upon rapid cooling from the molten state was further investigated. The cooling rates required for vitrification differed greatly between the CPs and were correlated with the cation flexibility.
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Affiliation(s)
- Tomoyuki Mochida
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan.,Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
| | - Yi Qiu
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
| | - Ryo Sumitani
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
| | - Hironori Kimata
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
| | - Yoshitomo Furushima
- Materials Characterization Laboratories, Toray Research Center Inc., 3-7, Sonoyama 3-chome, Otsu, Shiga 520-8567, Japan
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6
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Hamada S, Mochida T. Thermal Properties and Solvent Polarities of Mixed-Valence Ionic Liquids Containing Cationic Biferrocenylene Derivatives. Inorg Chem 2022; 61:8160-8167. [PMID: 35559612 DOI: 10.1021/acs.inorgchem.2c00395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ionic liquids (ILs) containing cationic mixed-valence biferrocenylene derivatives were synthesized with an octanoyl or octyl substituent in each cation. Their melting points ranged between 25 and 39 °C, and the octanoyl derivatives exhibited higher melting points than the octyl derivatives. In addition, each IL exhibited a glass transition in the temperature ranging from -66 to -45 °C after melting. Their melting points were ∼10 °C higher than those of mononuclear octamethylferrocenium salts bearing the same substituents. The solvent polarity (ETN) and Kamlet-Taft parameters (π*, α, and β) of these dinuclear and mononuclear ILs were then examined. The dinuclear ILs bearing octanoyl substituents exhibited significant increases in ETN and π* and a decrease in α with the decreasing temperature, whereas the other ILs exhibited a significantly less pronounced temperature dependence. Finally, the intervalence charge-transfer (or charge-resonance) bands of the octanoyl dinuclear ILs exhibited red shifts with the decreasing temperature, which can be regarded as self-thermosolvatochromism.
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Affiliation(s)
- Shota Hamada
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Hyogo, Japan
| | - Tomoyuki Mochida
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Hyogo, Japan.,Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Hyogo, Japan
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7
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Thermal properties, crystal structures, and photoreactivity of Ru-containing ionic liquids with sulfur-containing substituents. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117784] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Kimata H, Inagaki T, Mochida T. Anion-Ordering Phase Transitions in Biferrocenium and Ferrocenium Salts with the Bis(trifluoromethanesulfonyl)amide Anion. ACS OMEGA 2021; 6:21139-21146. [PMID: 34423221 PMCID: PMC8375087 DOI: 10.1021/acsomega.1c03059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 07/22/2021] [Indexed: 06/13/2023]
Abstract
The bis(trifluoromethanesulfonyl)amide anion (Tf2N), which is a common component of ionic liquids, often exhibits disorder in the solid state. In this study, the phase transitions and crystal structures of the Tf2N salts of 1,1‴-dineopentyl-1',1″-biferrocene (=npBifc), 1',1″-biferrocene (=Bifc), ferrocene, and cobaltocene (1-4, respectively) were compared. All the salts exhibited phase transitions at low temperatures, which are accompanied by anion ordering, though the ordering was not complete in 2 and 3. X-ray crystallographic investigation revealed that the cations and anions in 1 and 2 adopted alternating arrangements and segregated columnar arrangements, respectively. The cation in 1 exhibited a symmetrical, average-valence structure in the room-temperature phase owing to rapid valence tautomerization, whereas the cation exhibited an unsymmetrical structure in the low-temperature phase. The cation in 2 exhibited an unsymmetrical, trapped-valence structure in both phases. The cation valence states in these salts were accounted for by the electrostatic interactions between the cations and anions. The crystal structures and phase behavior of the ferrocenium salt 3 were very different from those of 4.
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Affiliation(s)
- Hironori Kimata
- Department
of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
| | - Takashi Inagaki
- Department
of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
| | - Tomoyuki Mochida
- Department
of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
- Research
Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
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9
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Mochida T, Maekawa S, Sumitani R. Photoinduced and Thermal Linkage Isomerizations of an Organometallic Ionic Liquid Containing a Half-Sandwich Ruthenium Thiocyanate Complex. Inorg Chem 2021; 60:12386-12391. [PMID: 34350763 DOI: 10.1021/acs.inorgchem.1c01613] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metal complexes with thiocyanate (SCN-) ligands typically exhibit S- or N-coordinated linkage isomers. In this study, to explore ionic liquids that exhibit stimuli-responsiveness based on linkage isomerization, we synthesized an ionic liquid containing a cationic half-sandwich thiocyanate complex, [Ru(C6H6)(NCS)L]Tf2N (L = N-hexyl-2-pyridinemethanimine, Tf2N = bis(trifluoromethanesulfonyl)amide anion). The as-synthesized ionic liquid was a 0.7:0.3 mixture of N- and S-coordinated isomers, presenting as an extremely viscous liquid exhibiting a glass transition at 0 °C. Isomerization from the N- to the S-coordinated isomer occurred upon UV photoirradiation or heating, although thermal isomerization was accompanied by significant decomposition. The N- and S-coordinated isomers were separated into brown and orange liquids, respectively, using gel permeation chromatography. Each isomer exhibited a small solvatochromic absorption shift in organic solvents, with different solvent dependences observed for the two isomers.
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Affiliation(s)
- Tomoyuki Mochida
- Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan.,Research Center for Membrane and Film Technology, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
| | - Syou Maekawa
- Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
| | - Ryo Sumitani
- Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
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10
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Thermal properties and crystal structures of ruthenium-containing photoreactive ionic liquids with short substituents. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Sumitani R, Mochida T. Metal-Containing Poly(ionic liquid) Exhibiting Photogeneration of Coordination Network: Reversible Control of Viscoelasticity and Ionic Conductivity. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01141] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Ryo Sumitani
- Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada,
Kobe, Hyogo 657-8501, Japan
| | - Tomoyuki Mochida
- Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada,
Kobe, Hyogo 657-8501, Japan
- Center for Membrane and Film Technology, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
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12
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Fan R, Sumitani R, Mochida T. Synthesis and Reactivity of Cyclopentadienyl Ruthenium(II) Complexes with Tris(alkylthio)benzenes: Transformation between Dinuclear and Sandwich-Type Complexes. ACS OMEGA 2020; 5:2034-2040. [PMID: 32039341 PMCID: PMC7003506 DOI: 10.1021/acsomega.9b04272] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 01/15/2020] [Indexed: 06/10/2023]
Abstract
To explore the structural transformation of cyclopentadienyl ruthenium (CpRu) complexes in response to external stimuli, the reaction of [RuCp(MeCN)3][X] (X = PF6, (FSO2)2N [= FSA]) and tris(alkylthio)benzenes (1,3,5-C6H3(SR)3; L 1 : R = Pr, L 2 : R = Me) was investigated, and the crystal structures and thermal properties of the products were examined. The reaction produced the sandwich complexes [RuCpL n ][X] or dinuclear complexes [Ru2Cp2(μ-L n )2(CH3CN) m ][X]2 (X = PF6, FSA) depending on the reaction conditions. The sandwich complex [RuCpL 1 ][FSA] was an ionic liquid. The solids of dinuclear complexes transformed into the thermodynamically stable sandwich complexes upon heating accompanied by acetonitrile loss. This change resulted in a transformation from crystal to ionic liquid for complexes with the FSA anion. UV irradiation of the sandwich complex [RuCpL 1 ][PF6] in methanol produced the dinuclear complex [Ru2Cp2(μ-L 1 )2 L 1 2][PF6]2. The complex transformed into the sandwich complex upon heating.
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Affiliation(s)
- Rong Fan
- Department
of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Kobe, Hyogo 657-8501, Japan
| | - Ryo Sumitani
- Department
of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Kobe, Hyogo 657-8501, Japan
| | - Tomoyuki Mochida
- Department
of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Kobe, Hyogo 657-8501, Japan
- Center
for Membrane and Film Technology, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657-8501, Japan
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13
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Matsubara Y. Solvent Effect on Ferrocenium/Ferrocene Redox Couple as an Internal Standard in Acetonitrile and a Room-temperature Ionic Liquid. CHEM LETT 2020. [DOI: 10.1246/cl.190722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yasuo Matsubara
- Department of Material and Life Chemistry, Kanagawa University, Rokkakubashi, Yokohama, Kanagawa 221-8686, Japan
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14
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Mochida T, Sumitani R, Yamazoe T. Thermal properties, crystal structures, and phase diagrams of ionic plastic crystals and ionic liquids containing a chiral cationic sandwich complex. Phys Chem Chem Phys 2020; 22:25803-25810. [DOI: 10.1039/d0cp04870d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Salts of a chiral ruthenium sandwich complex with various anions were synthesized and their phase diagrams were investigated.
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Affiliation(s)
- Tomoyuki Mochida
- Department of Chemistry
- Graduate School of Science
- Kobe University
- Hyogo 657-8501
- Japan
| | - Ryo Sumitani
- Department of Chemistry
- Graduate School of Science
- Kobe University
- Hyogo 657-8501
- Japan
| | - Tomoaki Yamazoe
- Department of Chemistry
- Graduate School of Science
- Kobe University
- Hyogo 657-8501
- Japan
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15
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Sumitani R, Yoshikawa H, Mochida T. Reversible control of ionic conductivity and viscoelasticity of organometallic ionic liquids by application of light and heat. Chem Commun (Camb) 2020; 56:6189-6192. [DOI: 10.1039/d0cc02786c] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Ruthenium-containing ionic liquids were reversibly converted to amorphous coordination polymers or oligomeric liquids by the alternate application of ultraviolet light or heat, thus enabling control of their ionic conductivity and viscoelasticity.
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Affiliation(s)
- Ryo Sumitani
- Department of Chemistry
- Graduate School of Science
- Kobe University
- Kobe
- Japan
| | - Hirofumi Yoshikawa
- School of Science & Technology
- Kwansei Gakuin University 2-1 Gakuen
- Sanda
- Japan
| | - Tomoyuki Mochida
- Department of Chemistry
- Graduate School of Science
- Kobe University
- Kobe
- Japan
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16
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Zhang S, Wang Y, Wang X, Yao J, Li H. Physicochemical Properties of the Binary Mixtures of CuII-Containing Chelate-Based Ionic Liquids with Linear Alcohols. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b04941] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Songna Zhang
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yongtao Wang
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, Hangzhou 310027, P. R. China
| | - Xinyu Wang
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, Hangzhou 310027, P. R. China
| | - Jia Yao
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, Hangzhou 310027, P. R. China
| | - Haoran Li
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, Hangzhou 310027, P. R. China
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, P. R. China
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17
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Matsuoka A, Kamio E, Matsuyama H. Investigation into the Effective Chemical Structure of Metal-Containing Ionic Liquids for Oxygen Absorption. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03467] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Atsushi Matsuoka
- Research Center for Membrane and Film Technology and Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Eiji Kamio
- Research Center for Membrane and Film Technology and Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Hideto Matsuyama
- Research Center for Membrane and Film Technology and Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
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18
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Suzuki S, Maya R, Uchida Y, Naota T. Strategy for Stimuli-Induced Spin Control Using a Liquescent Radical Cation. ACS OMEGA 2019; 4:10031-10035. [PMID: 31460095 PMCID: PMC6648313 DOI: 10.1021/acsomega.9b00982] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 05/28/2019] [Indexed: 06/10/2023]
Abstract
A liquescent salt based on an N-pentylphenothiazine radical cation (1 •+ ·NTf 2 - ) exhibited a unique crystal-crystal phase transition from a paramagnetic orange solid to a diamagnetic green solid induced by brief, weak, and pinpoint mechanostress. Electron spin resonance and electronic spectroscopies revealed that this unprecedented solid-state spin controllability was attributable to mechanostress-triggered sequential association of the highly mobile radical species occurring under neat conditions.
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19
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Kimata H, Mochida T. Crystal Structures and Melting Behaviors of 2D and 3D Anionic Coordination Polymers Containing Organometallic Ionic Liquid Components. Chemistry 2019; 25:10111-10117. [DOI: 10.1002/chem.201900979] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Hironori Kimata
- Department of ChemistryKobe University Rokkodai, Nada Kobe Hyogo 6578501 Japan
| | - Tomoyuki Mochida
- Department of ChemistryKobe University Rokkodai, Nada Kobe Hyogo 6578501 Japan
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20
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Javed F, Ullah F, Zakaria MR, Akil HM. An approach to classification and hi-tech applications of room-temperature ionic liquids (RTILs): A review. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.09.005] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Paramagnetic organometallic ionic liquids exhibiting thermochromism based on monomer–dimer equilibrium of cationic half-sandwich complexes. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.08.119] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Ueda T, Tominaga T, Mochida T, Takahashi K, Kimura S. Photogeneration of Microporous Amorphous Coordination Polymers from Organometallic Ionic Liquids. Chemistry 2018; 24:9490-9493. [DOI: 10.1002/chem.201801365] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 05/30/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Takahiro Ueda
- Department of Chemistry; Graduate School of Science; Kobe University; Kobe Hyogo 657-8501 Japan
| | - Takumi Tominaga
- Department of Chemistry; Graduate School of Science; Kobe University; Kobe Hyogo 657-8501 Japan
| | - Tomoyuki Mochida
- Department of Chemistry; Graduate School of Science; Kobe University; Kobe Hyogo 657-8501 Japan
| | - Kazuyuki Takahashi
- Department of Chemistry; Graduate School of Science; Kobe University; Kobe Hyogo 657-8501 Japan
| | - Seiji Kimura
- Coordinated Center for UEC Research Facilities; The University of Electro-Communications; Chofu Tokyo 182-8585 Japan
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23
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Tei C, Kuwahara D, Higashi T, Mochida T. Average Intermolecular Distances and Dynamics of Ruthenium-Containing Organometallic Ionic Liquids Studied by Nuclear Overhauser Effects between 19F and 1H Nuclei and NMR Relaxation Rate Measurements. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20170313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Chikai Tei
- Graduate School of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Daisuke Kuwahara
- Graduate School of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Tomomi Higashi
- Graduate School of Science, Kobe University, 1-1 Rokkodai, Kobe, Hyogo 657-8501, Japan
| | - Tomoyuki Mochida
- Graduate School of Science, Kobe University, 1-1 Rokkodai, Kobe, Hyogo 657-8501, Japan
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24
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Tominaga T, Mochida T. Multifunctional Ionic Liquids from Rhodium(I) Isocyanide Complexes: Thermochromic, Fluorescence, and Chemochromic Properties Based on Rh−Rh Interaction and Oxidative Addition. Chemistry 2018; 24:6239-6247. [DOI: 10.1002/chem.201800333] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Takumi Tominaga
- Department of Chemistry, Graduate School of Science; Kobe University, Rokkodai, Nada; Kobe, Hyogo 657-8501 Japan
| | - Tomoyuki Mochida
- Department of Chemistry, Graduate School of Science; Kobe University, Rokkodai, Nada; Kobe, Hyogo 657-8501 Japan
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25
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Tominaga T, Ueda T, Mochida T. Effect of substituents and anions on the phase behavior of Ru(ii) sandwich complexes: exploring the boundaries between ionic liquids and ionic plastic crystals. Phys Chem Chem Phys 2018; 19:4352-4359. [PMID: 28119978 DOI: 10.1039/c6cp08308k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We recently developed ionic liquids containing cationic sandwich complexes. However, salts of the sandwich complexes often exhibit ionic plastic phases with high melting points. To explore the boundaries between ionic liquids and plastic crystals of sandwich salts, we investigated, in detail, the phase behavior of ruthenium complexes [Ru(C5H5)(C6H5R)][X] ([C0][X]: R = H, [C1][X]: R = Me, [C2][X]: R = Et, [C4][X]: R = Bu). Among salts containing the anions PF6-, FSA-, and B(CN)4-, [C0][X] and [C1][X] are solids that exhibit plastic phases at or above room temperature, whereas [C2][X] and [C4][X] are mostly ionic liquids. Salts containing the C(CN)3- anion exhibited lower melting points than the other salts. X-ray crystallography reveals that the cations and anions in most of these salts are arranged alternately in the solid state. However, in the case of [C0][C(CN)3], the cations and anions are stacked independently, thereby providing weaker cation-anion interactions that account for the relatively low melting point of this salt.
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Affiliation(s)
- Takumi Tominaga
- Department of Chemistry, Graduate School of Science, Kobe University, Kobe, Hyogo 657-8501, Japan.
| | - Takahiro Ueda
- Department of Chemistry, Graduate School of Science, Kobe University, Kobe, Hyogo 657-8501, Japan.
| | - Tomoyuki Mochida
- Department of Chemistry, Graduate School of Science, Kobe University, Kobe, Hyogo 657-8501, Japan.
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26
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Wei H, Wang Y, Yao J, Li H. Empirical study of physicochemical and spectral properties of CuII-containing chelate-based ionic liquids. Phys Chem Chem Phys 2018; 20:4109-4117. [DOI: 10.1039/c7cp07933h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure–property relations of chelate-based ionic liquids were systematically explored through the study of physicochemical and spectral properties.
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Affiliation(s)
- Huidan Wei
- Department of Chemistry
- ZJU-NHU United R&D Center
- Zhejiang University
- Hangzhou
- P. R. China
| | - Yongtao Wang
- Department of Chemistry
- ZJU-NHU United R&D Center
- Zhejiang University
- Hangzhou
- P. R. China
| | - Jia Yao
- Department of Chemistry
- ZJU-NHU United R&D Center
- Zhejiang University
- Hangzhou
- P. R. China
| | - Haoran Li
- Department of Chemistry and State Key Laboratory of Chemical Engineering
- Department of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- P. R. China
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27
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Jahromi Z, Mostafavi A, Shamspur T, Mohamadim M. Magnetic ionic liquid assisted single-drop microextraction of ascorbic acid before its voltammetric determination. J Sep Sci 2017; 40:4041-4049. [DOI: 10.1002/jssc.201700664] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 07/29/2017] [Accepted: 08/02/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Zahra Jahromi
- Department of Chemistry; Shahid Bahonar University of Kerman; Kerman Iran
- Young Researchers Society; Shahid Bahonar University of Kerman; Kerman Iran
| | - Ali Mostafavi
- Department of Chemistry; Shahid Bahonar University of Kerman; Kerman Iran
| | - Tayebeh Shamspur
- Department of Chemistry; Shahid Bahonar University of Kerman; Kerman Iran
| | - Maryam Mohamadim
- Pistachio Safety Research Center; Rafsanjan University of Medical Sciences; Rafsanjan Iran
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28
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Properties of Protic Ionic Liquids Comprised of
N
‐Alkyldiethylenetriamine and Their Complexation of Copper(II) Ions. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700568] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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Matsubara Y, Grills DC, Koide Y. Experimental Insight into the Thermodynamics of the Dissolution of Electrolytes in Room-Temperature Ionic Liquids: From the Mass Action Law to the Absolute Standard Chemical Potential of a Proton. ACS OMEGA 2016; 1:1393-1411. [PMID: 31457204 PMCID: PMC6640753 DOI: 10.1021/acsomega.6b00129] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Accepted: 12/12/2016] [Indexed: 06/10/2023]
Abstract
Room-temperature ionic liquids (ILs) are a class of nonaqueous solvents that have expanded the realm of modern chemistry, drawing increasing interest over the last few decades, not only in terms of their own unique physical chemistry but also in many applications including organic synthesis, electrochemistry, and biological systems, wherein charged solutes (i.e., electrolytes) often play vital roles. However, our fundamental understanding of the dissolution of an electrolyte in an IL is still rather limited. For example, the activity of a charged species has frequently been assumed to be unity without a clear experimental basis. In this study, we have discussed a standard component-based scheme for the dissolution of an electrolyte in an IL, supported by our observation of ideal Nernstian responses for the reduction of silver and ferrocenium salts in a representative IL, 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([emim+][NTf2 -] or [emim+][TFSI-]). Using this scheme, which was also supported by temperature-dependent measurements with ILs having longer alkyl chains in the imidazolium ring, and the solubility of the IL in water, we established the concept of Gibbs transfer energies of "pseudo-single ions" from the IL to conventional neutral molecular solvents (water, acetonitrile, and methanol). This concept, which bridges component- and constituent-based energetics, utilizes an extrathermodynamic assumption, which itself was justified by experimental observations. These energies enable us to eliminate inner potential differences between the IL and molecular solvents (solvent-solvent interactions), that is, on a practical level, conditional liquid junction potential differences, so that we can discuss ion-solvent interactions independently. Specifically, we have examined the standard electrode potential of the ferrocenium/ferrocene redox couple, Fc+/Fc, and the absolute intrinsic standard chemical potential of a proton in [emim+][NTf2 -], finding that the proton is more acidic in the IL than in water by 6.5 ± 0.6 units on the unified pH scale. These results strengthen the progress on the physical chemistry of ions in IL solvent systems on the basis of their activities, providing a rigorous thermodynamic framework.
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Affiliation(s)
- Yasuo Matsubara
- Department
of Material and Life Chemistry, Kanagawa
University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - David C. Grills
- Chemistry
Division, Brookhaven National Laboratory, P.O. Box 5000, Upton, New
York 11973-5000, United
States
| | - Yoshihiro Koide
- Department
of Material and Life Chemistry, Kanagawa
University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
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30
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Míguez-Lago S, Cid MM, Alonso-Gómez JL. Covalent Organic Helical Cages as Sandwich Compound Containers. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600997] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sandra Míguez-Lago
- Organic Chemistry Department; Vigo University; Lagoas-Marcosende s/n 36310 Vigo Galicia Spain
| | - M. Magdalena Cid
- Organic Chemistry Department; Vigo University; Lagoas-Marcosende s/n 36310 Vigo Galicia Spain
| | - J. Lorenzo Alonso-Gómez
- Organic Chemistry Department; Vigo University; Lagoas-Marcosende s/n 36310 Vigo Galicia Spain
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31
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Mochida T, Funasako Y, Ishida M, Saruta S, Kosone T, Kitazawa T. Crystal Structures and Phase Sequences of Metallocenium Salts with Fluorinated Anions: Effects of Molecular Size and Symmetry on Phase Transitions to Ionic Plastic Crystals. Chemistry 2016; 22:15725-15732. [DOI: 10.1002/chem.201603170] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Tomoyuki Mochida
- Department of Chemistry; Faculty of Science; Kobe University, Rokkodai, Nada; Hyogo 657-8501 Japan
| | - Yusuke Funasako
- Department of Applied Chemistry; Faculty of Engineering; Tokyo University of Science, Yamaguchi, Sanyo-Onoda; Yamaguchi 756-0884 Japan
| | - Mai Ishida
- Department of Chemistry; Faculty of Science; Kobe University, Rokkodai, Nada; Hyogo 657-8501 Japan
| | - Shingo Saruta
- Department of Chemistry; Faculty of Science; Toho University, Miyama, Funabashi; Chiba 274-8510 Japan
| | - Takashi Kosone
- Department of Chemistry; Faculty of Science; Toho University, Miyama, Funabashi; Chiba 274-8510 Japan
| | - Takafumi Kitazawa
- Department of Chemistry; Faculty of Science; Toho University, Miyama, Funabashi; Chiba 274-8510 Japan
- Research Center for Materials with Integrated Properties; Faculty of Science; Toho University, Miyama, Funabashi; Chiba 274-8510 Japan
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32
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Clark KD, Nacham O, Purslow JA, Pierson SA, Anderson JL. Magnetic ionic liquids in analytical chemistry: A review. Anal Chim Acta 2016; 934:9-21. [DOI: 10.1016/j.aca.2016.06.011] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 06/06/2016] [Accepted: 06/07/2016] [Indexed: 10/21/2022]
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33
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Synthesis and thermal properties of salts comprising cationic bis(oxazoline)-AuIII complexes and fluorinated anions. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.04.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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34
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35
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Higashi T, Ueda T, Mochida T. Effects of substituent branching and chirality on the physical properties of ionic liquids based on cationic ruthenium sandwich complexes. Phys Chem Chem Phys 2016; 18:10041-8. [PMID: 27004435 DOI: 10.1039/c6cp00643d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
An appropriate understanding of how substituents affect the physical properties of ionic liquids is important for the molecular design of ionic liquids. Toward this end, we investigated how the branching and chirality of substituents affect the physical properties of organometallic ionic liquids. We synthesized a series of ionic liquids bearing a branched or linear alkoxy group with the same number of carbons: [Ru(C5H5)(η(6)-C6H5OR)]X (rac-[1]X: R = -CH(C2H5)(C6H13), [2]X: R = -CH(C4H9)2, [3]X: R = -C9H19), where X = PF6(-), (SO2F)2N(-), and (SO2CF3)2N(-). rac-[1]X are racemic salts. Salts with less symmetrical substituents tend to maintain the liquid state due to suppression of crystallization; crystallization is completely suppressed in most of the rac-[1]X salts and in some of the [2]X salts, whereas not in [3]X salts. The glass-transition temperatures and viscosities of the salts with branched substituents are greater than those with linear substituents. Chiral resolution of rac-[1][PF6] was performed by chiral chromatography. The melting point of rac-[1][PF6] is much lower than that of the enantiopure salt (chiral-[1][PF6]), which we ascribe to the formation of a conglomerate in the solid state. X-ray structure analysis revealed that the solid salts form layered structures.
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Affiliation(s)
- Tomomi Higashi
- Department of Chemistry, Graduate School of Science, Kobe University, Kobe, Hyogo 657-8501, Japan.
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36
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Watanabe M, Nakayama C, Yasuda H, Harada M, Iida M. Interactions of nickel(II) ions in protic ionic liquids comprising N-hexyl(or N-2-ethtylhexyl)ethylenediamines. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2015.11.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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37
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Funasako Y, Mori S, Mochida T. Reversible transformation between ionic liquids and coordination polymers by application of light and heat. Chem Commun (Camb) 2016; 52:6277-9. [DOI: 10.1039/c6cc02807a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Reversible transformation between ionic liquids and coordination polymers by application of light and heat has been achieved.
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Affiliation(s)
- Yusuke Funasako
- Department of Chemistry
- Graduate School of Science
- Kobe University
- Kobe
- Japan
| | - Shotaro Mori
- Department of Chemistry
- Graduate School of Science
- Kobe University
- Kobe
- Japan
| | - Tomoyuki Mochida
- Department of Chemistry
- Graduate School of Science
- Kobe University
- Kobe
- Japan
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38
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Organometallic ionic liquids from half-sandwich Ru(II) complexes with various chelating ligands. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.09.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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39
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Funasako Y, Kaneshige K, Inokuchi M, Hosokawa H, Mochida T. Ionic liquids containing cationic SNS-pincer palladium(II) complexes: Effects of ancillary ligands on thermal properties and solvent polarities. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.08.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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40
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Yao W, Kelley SP, Rogers RD, Vaid TP. Electrical conductivity in two mixed-valence liquids. Phys Chem Chem Phys 2015; 17:14107-14. [PMID: 25960288 DOI: 10.1039/c5cp01172h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Two different room-temperature liquid systems were investigated, both of which conduct a DC electrical current without decomposition or net chemical transformation. DC electrical conductivity is possible in both cases because of the presence of two different oxidation states of a redox-active species. One system is a 1 : 1 molar mixture of n-butylferrocene (BuFc) and its cation bis(trifluoromethane)sulfonimide salt, [BuFc(+)][NTf2(-)], while the other is a 1 : 1 molar mixture of TEMPO and its cation bis(trifluoromethane)sulfonimide salt, [TEMPO(+)][NTf2(-)]. The TEMPO-[TEMPO(+)][NTf2(-)] system is notable in that it is an electrically conducting liquid in which the conductivity originates from an organic molecule in two different oxidation states, with no metals present. Single-crystal X-ray diffraction of [TEMPO(+)][NTf2(-)] revealed a complex structure with structurally different cation-anion interactions for cis- and trans [NTf2(-)] conformers. The electron transfer self-exchange rate constant for BuFc/BuFc(+) in CD3CN was determined by (1)H NMR spectroscopy to be 5.4 × 10(6) M(-1) s(-1). The rate constant allowed calculation of an estimated electrical conductivity of 7.6 × 10(-5)Ω(-1) cm(-1) for BuFc-[BuFc(+)][NTf2(-)], twice the measured value of 3.8 × 10(-5)Ω(-1) cm(-1). Similarly, a previously reported self-exchange rate constant for TEMPO/TEMPO(+) in CH3CN led to an estimated conductivity of 1.3 × 10(-4)Ω(-1) cm(-1) for TEMPO-[TEMPO(+)][NTf2(-)], a factor of about 3 higher than the measured value of 4.3 × 10(-5)Ω(-1) cm(-1).
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Affiliation(s)
- Wenzhi Yao
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, USA.
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41
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Komurasaki A, Funasako Y, Mochida T. Colorless organometallic ionic liquids from cationic ruthenium sandwich complexes: thermal properties, liquid properties, and crystal structures of [Ru(η(5)-C5H5)(η(6)-C6H5R)][X] (X = N(SO2CF3)2, N(SO2F)2, PF6). Dalton Trans 2015; 44:7595-605. [PMID: 25811542 DOI: 10.1039/c5dt00723b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A series of ionic liquids containing cationic ruthenium complexes ([Ru(C5H5)(C6H5R)](+)) were prepared, and their thermal properties were investigated (R = C4H9 (1a), C8H17 (1b), OCH2OCH3 (2a), O(CH2CH2O)2CH3 (2b), O(CH2)3CN (3a), O(CH2)6CN (3b), CO(CH2)2CH3 (4a), CO(CH2)6CH3 (4b)). Bis(trifluoromethanesulfonyl)amide (TFSA) and bis(fluorosulfonyl)amide (FSA) were used as counter anions. These ionic liquids were colorless and stable toward air and light. These salts exhibited glass transitions upon cooling from the melt (Tg = −82 °C to −55 °C), and the glass transition temperatures of the salts increased as the polarity of the substituents increased (alkyl < ether < cyano < carbonyl). The decomposition temperatures decreased in the order of alkyl > cyano > carbonyl > ether. The viscosities, solvent polarities, and refractive indices of the salts of 1a and 2a were also evaluated. Hexafluorophosphate (PF6) salts were also prepared, which were solids with high melting points (Tm = 65–127 °C). X-ray crystal structure analyses of these salts revealed the importance of intermolecular contacts involving the ring hydrogens. The PF6 salt of 2a exhibited an order–disorder phase transition.
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Affiliation(s)
- Aina Komurasaki
- Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada, Hyogo 657-8501, Japan.
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42
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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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43
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Hosokawa H, Funasako Y, Mochida T. Ionic liquids from cationic palladium(II) chelate complexes: preparation, thermal properties, and crystal structures. Dalton Trans 2015; 43:6864-9. [PMID: 24658643 DOI: 10.1039/c4dt00192c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Metal-containing ionic liquids comprising cationic Pd(II) chelate complexes and the bis(trifluoromethanesulfonyl)amide (Tf2N) anion were prepared: [Pd(acac)(Me4en)]Tf2N (1), [Pd(acac)(BuMe3en)]Tf2N (2), and [Pd(C8-acac)(Me4en)]Tf2N (3) (acac = 2,4-pentanedionate, C8-acac = 3-octyl-2,4-pentanedionate, Me4en = N,N,N',N'-tetramethylethylenediamine, BuMe3en = N-butyl-N,N',N'-trimethylethylenediamine). These salts were yellow solids with melting points of 85.2 °C, 71.1 °C, and 62.3 °C, respectively. During cooling from the liquid state, complex 1 exhibited crystallization, whereas 2 and 3 exhibited only glass transitions at approximately -40 °C. X-ray structure determination revealed that the cations in 1 and 3 form dimer-like arrangements and that there were no direct contacts between the charged moieties of the cations and anions in the solid state.
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Affiliation(s)
- Hitoshi Hosokawa
- Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada, Hyogo 657-8501, Japan.
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44
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Gélinas B, Rochefort D. Synthesis and characterization of an electroactive ionic liquid based on the ferrocenylsulfonyl(trifluoromethylsulfonyl)imide anion. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.11.154] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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45
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Ueda T, Mochida T. Thermal Properties and Crystal Structures of Ionic Liquids from Ruthenium Sandwich Complexes with Trialkoxybenzene Ligands: Effects of Substituent Positions and Alkyl Chain Lengths. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00021] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takahiro Ueda
- Department
of Chemistry,
Graduate School of Science, Kobe University, Rokkodai, Nada, Hyogo 657-8501, Japan
| | - Tomoyuki Mochida
- Department
of Chemistry,
Graduate School of Science, Kobe University, Rokkodai, Nada, Hyogo 657-8501, Japan
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46
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Bernardes CES, Mochida T, Canongia Lopes JN. Modeling the structure and thermodynamics of ferrocenium-based ionic liquids. Phys Chem Chem Phys 2015; 17:10200-8. [DOI: 10.1039/c5cp00695c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new force-field for the description of ferrocenium-based ionic liquids is reported. Their unique nanostructure is probed by MD simulations.
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Affiliation(s)
- Carlos E. S. Bernardes
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
- Portugal
| | - Tomoyuki Mochida
- Department of Chemistry
- Graduate School of Science
- Kobe University
- Kobe
- Japan
| | - José. N. Canongia Lopes
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
- Portugal
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47
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Nakano H, Noguchi J, Mochida T, Sato H. Theoretical Studies on the Electronic States and Liquid Structures of Ferrocenium-Based Ionic Liquids. J Phys Chem A 2014; 119:5181-8. [DOI: 10.1021/jp509859f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Tomoyuki Mochida
- Department of Chemistry, Kobe University, Rokkodai,
Nada, Kobe 657-8501, Japan
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48
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Takemura S, Kawakami S, Harada M, Iida M. Solvation Structure of a Copper(II) Ion in Protic Ionic Liquids Comprising N-Hexylethylenediamine. Inorg Chem 2014; 53:9667-78. [DOI: 10.1021/ic501177t] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shinobu Takemura
- Department
of Chemistry, Faculty of Science, and ‡Department of Textile and Apparel
Science, Faculty of Human Life and Environmental Sciences, Nara Women’s University, Kita-uoya-nishi-machi, Nara 630-8506, Japan
| | - Sayaka Kawakami
- Department
of Chemistry, Faculty of Science, and ‡Department of Textile and Apparel
Science, Faculty of Human Life and Environmental Sciences, Nara Women’s University, Kita-uoya-nishi-machi, Nara 630-8506, Japan
| | - Masafumi Harada
- Department
of Chemistry, Faculty of Science, and ‡Department of Textile and Apparel
Science, Faculty of Human Life and Environmental Sciences, Nara Women’s University, Kita-uoya-nishi-machi, Nara 630-8506, Japan
| | - Masayasu Iida
- Department
of Chemistry, Faculty of Science, and ‡Department of Textile and Apparel
Science, Faculty of Human Life and Environmental Sciences, Nara Women’s University, Kita-uoya-nishi-machi, Nara 630-8506, Japan
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Okuhata M, Mochida T. Ionic liquids from the cationic cobalt(III) Schiff base complex, [Co(acacen)L2][Tf2N] (acacen = N,N′-bis(acetylacetone)ethylenediamine, Tf2N = bis(trifluoromethanesulfonyl)amide). J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.917295] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Megumi Okuhata
- Department of Chemistry, Graduate School of Science, Kobe University, Kobe, Japan
| | - Tomoyuki Mochida
- Department of Chemistry, Graduate School of Science, Kobe University, Kobe, Japan
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50
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Liu P, Forni A, Chen H. Development of Solvent-Free Ambient Mass Spectrometry for Green Chemistry Applications. Anal Chem 2014; 86:4024-32. [DOI: 10.1021/ac500527q] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Pengyuan Liu
- Center for Intelligent Chemical
Instrumentation, †Department
of Chemistry and Biochemistry, ‡Edison Biotechnology
Institute, Ohio University, Athens, Ohio 45701, United States
| | - Amanda Forni
- Center for Intelligent Chemical
Instrumentation, †Department
of Chemistry and Biochemistry, ‡Edison Biotechnology
Institute, Ohio University, Athens, Ohio 45701, United States
| | - Hao Chen
- Center for Intelligent Chemical
Instrumentation, †Department
of Chemistry and Biochemistry, ‡Edison Biotechnology
Institute, Ohio University, Athens, Ohio 45701, United States
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