Thermotropic mesomorphism of mixed-valent diruthenium aliphatic carboxylates with axial anion bearing two aliphatic chains
A homologous series of binuclear mixed-valent diruthenium tetracarboxylates, Ru2(O2C(CH2)n-2CH3)4DHDP (DHDP = di(hexadecyl)phosphate axial anion, n = 10, 12, 14, 16, and 18), have been synthesized and characterized, and the liquid crystalline properties of these compounds were examined. All the comp...
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todo:paper_00958972_v66_n19_p3380_Bottazzi2023-10-03T14:56:40Z Thermotropic mesomorphism of mixed-valent diruthenium aliphatic carboxylates with axial anion bearing two aliphatic chains Bottazzi, T. Cecchi, F. Zelcer, A. Heinrich, B. Donnio, B. Guillon, D. Cukiernik, F.D. Columnar mesophases Coordination polymers Di(hexadecyl)phosphate Metallomesogens Ruthenium carboxylates A homologous series of binuclear mixed-valent diruthenium tetracarboxylates, Ru2(O2C(CH2)n-2CH3)4DHDP (DHDP = di(hexadecyl)phosphate axial anion, n = 10, 12, 14, 16, and 18), have been synthesized and characterized, and the liquid crystalline properties of these compounds were examined. All the compounds exhibit a room-temperature crystalline lamellar phase and a high temperature (above 140°) Colh mesophase. Another, probably semi-crystalline, lamellar intermediate phase has also been found for all the studied compounds but for the n = 18 derivative. Comparison with related mesogenic homologous series where the equatorial ligands are also linear carboxylates, but the axial anions bear just one aliphatic chain (carboxylates, octylsulfonate, and dodecylsulfate), shows that the presence of a second aliphatic chain in the axial anion both lowers the transition temperatures and modifies the nature of the intermediate lamellar phase. Structural models at the molecular level are suggested for the crystalline lamellar and the Colh phases. © 2013 Taylor & Francis. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00958972_v66_n19_p3380_Bottazzi |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Columnar mesophases Coordination polymers Di(hexadecyl)phosphate Metallomesogens Ruthenium carboxylates |
| spellingShingle |
Columnar mesophases Coordination polymers Di(hexadecyl)phosphate Metallomesogens Ruthenium carboxylates Bottazzi, T. Cecchi, F. Zelcer, A. Heinrich, B. Donnio, B. Guillon, D. Cukiernik, F.D. Thermotropic mesomorphism of mixed-valent diruthenium aliphatic carboxylates with axial anion bearing two aliphatic chains |
| topic_facet |
Columnar mesophases Coordination polymers Di(hexadecyl)phosphate Metallomesogens Ruthenium carboxylates |
| description |
A homologous series of binuclear mixed-valent diruthenium tetracarboxylates, Ru2(O2C(CH2)n-2CH3)4DHDP (DHDP = di(hexadecyl)phosphate axial anion, n = 10, 12, 14, 16, and 18), have been synthesized and characterized, and the liquid crystalline properties of these compounds were examined. All the compounds exhibit a room-temperature crystalline lamellar phase and a high temperature (above 140°) Colh mesophase. Another, probably semi-crystalline, lamellar intermediate phase has also been found for all the studied compounds but for the n = 18 derivative. Comparison with related mesogenic homologous series where the equatorial ligands are also linear carboxylates, but the axial anions bear just one aliphatic chain (carboxylates, octylsulfonate, and dodecylsulfate), shows that the presence of a second aliphatic chain in the axial anion both lowers the transition temperatures and modifies the nature of the intermediate lamellar phase. Structural models at the molecular level are suggested for the crystalline lamellar and the Colh phases. © 2013 Taylor & Francis. |
| format |
JOUR |
| author |
Bottazzi, T. Cecchi, F. Zelcer, A. Heinrich, B. Donnio, B. Guillon, D. Cukiernik, F.D. |
| author_facet |
Bottazzi, T. Cecchi, F. Zelcer, A. Heinrich, B. Donnio, B. Guillon, D. Cukiernik, F.D. |
| author_sort |
Bottazzi, T. |
| title |
Thermotropic mesomorphism of mixed-valent diruthenium aliphatic carboxylates with axial anion bearing two aliphatic chains |
| title_short |
Thermotropic mesomorphism of mixed-valent diruthenium aliphatic carboxylates with axial anion bearing two aliphatic chains |
| title_full |
Thermotropic mesomorphism of mixed-valent diruthenium aliphatic carboxylates with axial anion bearing two aliphatic chains |
| title_fullStr |
Thermotropic mesomorphism of mixed-valent diruthenium aliphatic carboxylates with axial anion bearing two aliphatic chains |
| title_full_unstemmed |
Thermotropic mesomorphism of mixed-valent diruthenium aliphatic carboxylates with axial anion bearing two aliphatic chains |
| title_sort |
thermotropic mesomorphism of mixed-valent diruthenium aliphatic carboxylates with axial anion bearing two aliphatic chains |
| url |
http://hdl.handle.net/20.500.12110/paper_00958972_v66_n19_p3380_Bottazzi |
| work_keys_str_mv |
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| _version_ |
1807324180924858368 |