2018 |
Dreyse, P; Alarcon, D A; Galdámez, A; González, I; Cortes-Arriagada, D; Castillo, F; Mella, A Influence of the Anion Nature and Alkyl Substituents in the Behavior of Ionic Liquids Derived from Phenylpyridines Artículo de revista Journal of Molecular Structure, 1154 , pp. 382-391, 2018, ISSN: 0022-2860. Resumen | Enlaces | BibTeX | Etiquetas: binding compounds, crystal design electrochemical-cells, emitting energies, gold ion ionic liquids, nanoparticles, pairs phenylpyridiniums, salts, solvents, structure, temperature, transition, transport, water @article{RN402, title = {Influence of the Anion Nature and Alkyl Substituents in the Behavior of Ionic Liquids Derived from Phenylpyridines}, author = { P. Dreyse and D.A. Alarcon and A. Gald\'{a}mez and I. Gonz\'{a}lez and D. Cortes-Arriagada and F. Castillo and A. Mella}, url = {/brokenurl#<Go to ISI>://WOS:000418212000043}, doi = {10.1016/j.molstruc.2017.10.062}, issn = {0022-2860}, year = {2018}, date = {2018-01-01}, journal = {Journal of Molecular Structure}, volume = {1154}, pages = {382-391}, publisher = {2017 Elsevier B.V.}, abstract = {Quaternary alkyl 2-phenylpyridinium and 2-(2,4-difluorophenyl)pyridinium amines with iodide, hexafluorophosphate and bis(trifluoromethylsulfonyl)imide anions have been fully characterized by H-1 NMR, FT-IR and MALDI mass spectroscopic methods and studied by quantum chemistry calculations. The compounds with bis(trifluoromethylsulfonyl)imide anion can be classified as ionic liquids, because they melt at room temperature. The quaternary amines with iodide and hexafluorophosphate anions are solid at 25 degrees C. The X-ray diffraction characterization of the 2-(2,4-difiuorophenyl)-1-methylphenylpyridinium hexafluorophosphate and 1-ethyl-2-(2,4-difluorophenyl)phenylpyridinium hexafluorophosphate show an extensive series of C-H center dot center dot center dot F, C-F center dot center dot center dot pi and P-F center dot center dot center dot pi it intermolecular interactions, which give rise to a supramolecular network. The relationship between the solid-state structures and the melting points is discussed by the evaluation of the thermal behavior based on experimental data from Differential Scanning Calorimetry (DSC) studies, and also using the analysis of the ion pairs binding energies. These new compounds based on phenylpyridine allow us to grow the diversity of ionic liquids and their crystalline salts, increasing the knowledge about the chemical and physical properties of these ionic species.}, keywords = {binding compounds, crystal design electrochemical-cells, emitting energies, gold ion ionic liquids, nanoparticles, pairs phenylpyridiniums, salts, solvents, structure, temperature, transition, transport, water}, pubstate = {published}, tppubtype = {article} } Quaternary alkyl 2-phenylpyridinium and 2-(2,4-difluorophenyl)pyridinium amines with iodide, hexafluorophosphate and bis(trifluoromethylsulfonyl)imide anions have been fully characterized by H-1 NMR, FT-IR and MALDI mass spectroscopic methods and studied by quantum chemistry calculations. The compounds with bis(trifluoromethylsulfonyl)imide anion can be classified as ionic liquids, because they melt at room temperature. The quaternary amines with iodide and hexafluorophosphate anions are solid at 25 degrees C. The X-ray diffraction characterization of the 2-(2,4-difiuorophenyl)-1-methylphenylpyridinium hexafluorophosphate and 1-ethyl-2-(2,4-difluorophenyl)phenylpyridinium hexafluorophosphate show an extensive series of C-H center dot center dot center dot F, C-F center dot center dot center dot pi and P-F center dot center dot center dot pi it intermolecular interactions, which give rise to a supramolecular network. The relationship between the solid-state structures and the melting points is discussed by the evaluation of the thermal behavior based on experimental data from Differential Scanning Calorimetry (DSC) studies, and also using the analysis of the ion pairs binding energies. These new compounds based on phenylpyridine allow us to grow the diversity of ionic liquids and their crystalline salts, increasing the knowledge about the chemical and physical properties of these ionic species. |
2013 |
Glynn, C; Thompson, D; Paez, J; Collins, G; Benavente, E; Lavayen, V; Yutronic, N; Holmes, J D; González, G; O'dwyer, C Large Directional Conductivity Change in Chemically Stable Layered Thin Films of Vanadium Oxide and a 1d Metal Complex Artículo de revista Journal of Materials Chemistry C, 1 (36), pp. 5675-5684, 2013, ISSN: 2050-7526. Resumen | Enlaces | BibTeX | Etiquetas: charge hybrid intercalation, low-temperature, materials, mechanism, nanocomposites, nanostructures, sol-gel, transport, v2o5 @article{RN136, title = {Large Directional Conductivity Change in Chemically Stable Layered Thin Films of Vanadium Oxide and a 1d Metal Complex}, author = { C. Glynn and D. Thompson and J. Paez and G. Collins and E. Benavente and V. Lavayen and N. Yutronic and J.D. Holmes and G. Gonz\'{a}lez and C. O'dwyer}, url = {/brokenurl#<Go to ISI>://WOS:000323578000011}, doi = {10.1039/c3tc31104j}, issn = {2050-7526}, year = {2013}, date = {2013-01-01}, journal = {Journal of Materials Chemistry C}, volume = {1}, number = {36}, pages = {5675-5684}, abstract = {Electroactive hybrid and layered oxides and related materials where the inorganic phase is the host, offering the conductivity characteristics of semiconductors, have been used in thin film transistors and related electronic devices where the host-guest interaction offered conductivity with improved processability. We describe the synthesis and characterization of a nanocomposite that shows large conductivity anisotropy when deposited as a thin film. We prepared the material by inserting quasi 1-dimensional potassium tetracyanoplatinate metal complexes with insulating electrical properties in between stacked nanosheets of vanadium oxide xerogels. Detailed structural and compositional analysis using transmission electron microscopy and X-ray photoelectron spectroscopy confirms that the hybrid material forms from a topotactic reaction and the framework of the layered host oxide structure is maintained. The hybrid film demonstrates a similar to 1000-fold conductivity change between transport parallel and perpendicular to the film at room temperature. Temperature dependent transport measurements confirm Ohmic conduction perpendicular to the stack and small polaron hopping conduction parallel to the layering direction of the film. The conductivity anisotropy and simple synthesis demonstrate that nanostructured layered hybrids can provide alternative materials for thin film complementary logic and resistive memory.}, keywords = {charge hybrid intercalation, low-temperature, materials, mechanism, nanocomposites, nanostructures, sol-gel, transport, v2o5}, pubstate = {published}, tppubtype = {article} } Electroactive hybrid and layered oxides and related materials where the inorganic phase is the host, offering the conductivity characteristics of semiconductors, have been used in thin film transistors and related electronic devices where the host-guest interaction offered conductivity with improved processability. We describe the synthesis and characterization of a nanocomposite that shows large conductivity anisotropy when deposited as a thin film. We prepared the material by inserting quasi 1-dimensional potassium tetracyanoplatinate metal complexes with insulating electrical properties in between stacked nanosheets of vanadium oxide xerogels. Detailed structural and compositional analysis using transmission electron microscopy and X-ray photoelectron spectroscopy confirms that the hybrid material forms from a topotactic reaction and the framework of the layered host oxide structure is maintained. The hybrid film demonstrates a similar to 1000-fold conductivity change between transport parallel and perpendicular to the film at room temperature. Temperature dependent transport measurements confirm Ohmic conduction perpendicular to the stack and small polaron hopping conduction parallel to the layering direction of the film. The conductivity anisotropy and simple synthesis demonstrate that nanostructured layered hybrids can provide alternative materials for thin film complementary logic and resistive memory. |
2018 |
Influence of the Anion Nature and Alkyl Substituents in the Behavior of Ionic Liquids Derived from Phenylpyridines Artículo de revista Journal of Molecular Structure, 1154 , pp. 382-391, 2018, ISSN: 0022-2860. |
2013 |
Large Directional Conductivity Change in Chemically Stable Layered Thin Films of Vanadium Oxide and a 1d Metal Complex Artículo de revista Journal of Materials Chemistry C, 1 (36), pp. 5675-5684, 2013, ISSN: 2050-7526. |