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Shin JY, Wang YL, Yamada SA, Hung ST, Fayer MD. Imidazole and 1-Methylimidazole Hydrogen Bonding and Nonhydrogen Bonding Liquid Dynamics: Ultrafast IR Experiments. J Phys Chem B 2019; 123:2094-2105. [DOI: 10.1021/acs.jpcb.8b11299] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jae Yoon Shin
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Yong-Lei Wang
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Steven A. Yamada
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Samantha T. Hung
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Michael D. Fayer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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Neouze MA, Litschauer M, Puchberger M, Peterlik H. Porous titania ionic nanoparticle networks. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:4110-4116. [PMID: 21348510 DOI: 10.1021/la105036d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Titania nanoparticle networks were synthesized by the reaction between imidazole and alkyl halide functionalized anatase nanoparticles. The reaction produced imidazolium bridging units between the nanoparticles that were observed by the means of CP MAS (15)N NMR spectroscopy. The porous characteristics of the obtained nanoparticle network were investigated with nitrogen sorption experiments. From these experiments, a high surface area originating from small mesopores was observed. These results were confirmed by small-angle X-ray diffraction experiments.
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Affiliation(s)
- Marie-Alexandra Neouze
- Institute of Materials Chemistry 165, Vienna University of Technology, 1060 Vienna, Austria.
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O’Dell LA, Schurko RW, Harris KJ, Autschbach J, Ratcliffe CI. Interaction Tensors and Local Dynamics in Common Structural Motifs of Nitrogen: A Solid-State 14N NMR and DFT Study. J Am Chem Soc 2010; 133:527-46. [DOI: 10.1021/ja108181y] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Luke A. O’Dell
- Steacie Institute for Molecular Sciences, National Research Council, 100 Sussex Drive, Ottawa, K1A 0R6 Ontario, Canada, Department of Chemistry, University of Windsor, 401 Sunset Avenue, Windsor, N9B 3P4 Ontario, Canada, and Department of Chemistry, 312 Natural Sciences Complex, State University of New York at Buffalo, Buffalo, New York 14260-3000, United States
| | - Robert W. Schurko
- Steacie Institute for Molecular Sciences, National Research Council, 100 Sussex Drive, Ottawa, K1A 0R6 Ontario, Canada, Department of Chemistry, University of Windsor, 401 Sunset Avenue, Windsor, N9B 3P4 Ontario, Canada, and Department of Chemistry, 312 Natural Sciences Complex, State University of New York at Buffalo, Buffalo, New York 14260-3000, United States
| | - Kristopher J. Harris
- Steacie Institute for Molecular Sciences, National Research Council, 100 Sussex Drive, Ottawa, K1A 0R6 Ontario, Canada, Department of Chemistry, University of Windsor, 401 Sunset Avenue, Windsor, N9B 3P4 Ontario, Canada, and Department of Chemistry, 312 Natural Sciences Complex, State University of New York at Buffalo, Buffalo, New York 14260-3000, United States
| | - Jochen Autschbach
- Steacie Institute for Molecular Sciences, National Research Council, 100 Sussex Drive, Ottawa, K1A 0R6 Ontario, Canada, Department of Chemistry, University of Windsor, 401 Sunset Avenue, Windsor, N9B 3P4 Ontario, Canada, and Department of Chemistry, 312 Natural Sciences Complex, State University of New York at Buffalo, Buffalo, New York 14260-3000, United States
| | - Christopher I. Ratcliffe
- Steacie Institute for Molecular Sciences, National Research Council, 100 Sussex Drive, Ottawa, K1A 0R6 Ontario, Canada, Department of Chemistry, University of Windsor, 401 Sunset Avenue, Windsor, N9B 3P4 Ontario, Canada, and Department of Chemistry, 312 Natural Sciences Complex, State University of New York at Buffalo, Buffalo, New York 14260-3000, United States
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Seo SH, Tew GN, Chang JY. Lyotropic columnar liquid crystals based on polycatenar 1H-imidazole amphiphiles and their assembly into bundles at the surface of silicon. SOFT MATTER 2006; 2:886-891. [PMID: 32680280 DOI: 10.1039/b606870g] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polycatenar 1-imidazole amphiphiles, consisting of a 1-imidazole head connected through a benzene ring to a trialkyloxyphenyl tail, were synthesized and their self-assembling properties investigated. The H NMR and fluorescence spectroscopy studies showed that in nonpolar solvents, the amphiphiles formed reverse micelles in which the hydrophilic imidazole heads aggregated inside the micelles through intermolecular hydrogen bonding and the nonpolar alkyl chains were located at the periphery of the micelles. In concentrated solutions, they formed lyotropic liquid crystals having columnar hexagonal structures. The molecules were arranged in a disk hydrogen bonding between successive imidazole moieties. When dilute solutions of the amphiphiles in -hexane (0.1 wt%) were spin-coated on to a plasma-cleaned Si wafer, a band-like structure with a width of 60-100 nm was imaged by AFM. Microscopic fiber bundles with a diameter as large as 13 µm were observed by SEM when the lyotropic liquid crystals in 30 wt% hexane solution were dried on the glass.
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Affiliation(s)
- Sang Hyuk Seo
- School of Materials Science and Engineering, and Hyperstructured Organic Materials Research Center, College of Engineering, Seoul National University, Seoul 151-744, Korea.
| | - Gregory N Tew
- Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - Ji Young Chang
- School of Materials Science and Engineering, and Hyperstructured Organic Materials Research Center, College of Engineering, Seoul National University, Seoul 151-744, Korea.
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Marchetti F, Pettinari C, Pettinari R, Cingolani A, Gobetto R, Chierotti MR, Drozdov A, Troyanov SI. The Imidazole Role in Strontium β-Diketonate Complexes Formation. Inorg Chem 2006; 45:3074-85. [PMID: 16562964 DOI: 10.1021/ic051972g] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A selection of new strontium beta-diketonate derivatives (imH2)2[Sr2(beta-dike)6] [where imH = imidazole and beta-dike = tfac (tfacH = 1,1,1-trifluoro-2,4-pentanedione), tfbz (tfbzH = 1,1,1-trifluoro-4-phenyl-2,4-butanedione), or hfac (hfacH = 1,1,1,5,5,5-hexafluoro-2,4-pentanedione)], [Sr2(tfac)4(Meim)2(H2O)2], (MeimH)2[Sr(beta-dike)4] (where Meim = 1-methylimidazole and beta-dike = tfbz or hfac), [Sr2(thd)4(imH)2(EtOH)], and [Sr2(thd)4(Meim)2(EtOH)] (where thdH = 2,2,6,6-tetramethyl-3,5-heptanedione) have been synthesized and fully characterized. (imH2)2[Sr2(beta-dike)6] and (MeimH)2[Sr(beta-dike)4] are di- and mononuclear Sr anionic complexes, respectively, while [Sr2(tfac)4(Meim)2(H2O)2], [Sr2(thd)4(imH)2(EtOH)], and [Sr2(thd)4(Meim)2(EtOH)] are neutral dinuclear molecular derivatives. The derivative (imH2)2[Sr2(hfac)6] slowly decomposes in solution under aerobic conditions, giving (imH2)2[Sr(H2O)2(tfa)3](tfa) (tfaH = trifluoroacetic acid), which is an ionic compound containing polynuclear anionic chains composed of Sr(H2O)2(tfa)3 units. When a deficiency of imH is employed, the thdH proligand forms not only the dinuclear derivative [Sr2(thd)4(imH)2(EtOH)] but also an additional product with the formula [Sr(thd)2(H2O)2(EtOH)], in which the Sr atom is seven-coordinated. A complete solid-state characterization has been accomplished by comparing X-ray and solid-state 13C NMR data. Elucidation of the H-bond interaction between the heterocyclic rings and metal complexes by cross-polarization magic-angle-spinning 15N NMR is also reported.
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Affiliation(s)
- Fabio Marchetti
- Dipartimento di Scienze Chimiche, Università degli Studi, via S. Agostino 1, 62032 Camerino, Italy.
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Fischbach I, Spiess HW, Saalwächter K, Goward GR. Solid State NMR Spectroscopic Investigations of Model Compounds for Imidazole-Based Proton Conductors. J Phys Chem B 2004. [DOI: 10.1021/jp046848h] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ingrid Fischbach
- BASF AG, Polymer Research, Department of Polymer Physics, 67056 Ludwigshafen, Germany
| | | | - Kay Saalwächter
- Institut für Makromolekulare Chemie, Universität Freiburg, Stefan-Meier Str. 31, D-79104 Freiburg
| | - Gillian R. Goward
- Department of Chemistry, McMaster University, 1280 Main St. W., Hamilton, ON, L8S 4M1 Canada
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Goward GR, Saalwächter K, Fischbach I, Spiess HW. Reorientation phenomena in imidazolium methyl sulfonate as probed by advanced solid-state NMR. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2003; 24:150-162. [PMID: 12943911 DOI: 10.1016/s0926-2040(03)00043-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Evidence for reorientation of imidazolium rings in imidazolium methylsulfonate is demonstrated using solid-state NMR. This material is a model system for exciting new proton-conducting materials based on imidazole. Two advanced NMR methods, including 1H-13C and 1H-15N recoupled polarization transfer with dipolar sideband pattern analysis and analysis of the coalescence of 13C lineshapes are used to characterize the ring reorientation. The process is found to occur at temperatures well below the melting point of the salt, between 240 and 380 K, and is described by a single activation energy, of 38+/-5 kJ/mol. This material is considered as a model system for quantifying the ring reorientation process, which is often proposed to be the rate-limiting step in proton transport in imidazole-based proton conducting materials.
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Affiliation(s)
- Gillian R Goward
- Department of Chemistry, McMaster University, 1280 Main St. W. Hamilton, ON, Canada L8S 4M1.
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