Lyotropic behavior of diruthenium (II,III) alkoxybenzoates in dodecane
The lyotropic behavior of three mixed valence diruthenium(II,III) alkoxybenzoates in dodecane mixtures has been analyzed. The studied compounds, namely, Ru2(3,4,5-B3OC14)4Cl [1] (3,4,5-B3OC14 = 3,4,5-tri(n-tetradecyloxy)benzoate), Ru2(3,4-B2OC14)4Cl [2] (3,4-B2OC14 = 3,4-di(n-tetradecyloxy)benzoate)...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_07437463_v18_n26_p10116_Rusjan |
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todo:paper_07437463_v18_n26_p10116_Rusjan2023-10-03T15:38:34Z Lyotropic behavior of diruthenium (II,III) alkoxybenzoates in dodecane Rusjan, M. Donnio, B. Heinrich, B. Cukiernik, F.D. Guillon, D. Chemical analysis Complexation Electronic structure Melting Mixtures Nematic liquid crystals Paraffins Phase transitions Solutions Swelling Temperature Viscosity Diruthenium alkoxybenzoates Lyotropic behavior Melting point Nematic columnar mesophase Ruthenium compounds The lyotropic behavior of three mixed valence diruthenium(II,III) alkoxybenzoates in dodecane mixtures has been analyzed. The studied compounds, namely, Ru2(3,4,5-B3OC14)4Cl [1] (3,4,5-B3OC14 = 3,4,5-tri(n-tetradecyloxy)benzoate), Ru2(3,4-B2OC14)4Cl [2] (3,4-B2OC14 = 3,4-di(n-tetradecyloxy)benzoate), and Ru2(3,5-B2OC14)4Cl [3] (3,5-B2OC14 = 3,5-di(n-tetradecyloxy)benzoate), were investigated at three different temperatures (40, 70, and 100°C) for variable solvent concentrations (between 0 and 70 wt%). Mixing the complexes with up to 40-60 wt% of dodecane did not alter the nature of the low-temperature mesophase exhibited by the pure compound still showing a columnar hexagonal phase. However, it resulted in a substantial decrease of the viscosity for all of them and a depression of the melting point for [2]. For solvent concentrations greater than 40-60 wt% and high temperatures, the mixtures exhibited also a nematic columnar mesophase prior to the transition to the isotropic solution. At a structural level, the incorporation of solvent resulted in the swelling of the columns, leading to an increase of the intercolumnar distance up to a point where the columns lost their hexagonal order to give the columnar nematic phase. At higher concentrations of solvent, the mesophase dissolved into the solvent. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07437463_v18_n26_p10116_Rusjan |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Chemical analysis Complexation Electronic structure Melting Mixtures Nematic liquid crystals Paraffins Phase transitions Solutions Swelling Temperature Viscosity Diruthenium alkoxybenzoates Lyotropic behavior Melting point Nematic columnar mesophase Ruthenium compounds |
| spellingShingle |
Chemical analysis Complexation Electronic structure Melting Mixtures Nematic liquid crystals Paraffins Phase transitions Solutions Swelling Temperature Viscosity Diruthenium alkoxybenzoates Lyotropic behavior Melting point Nematic columnar mesophase Ruthenium compounds Rusjan, M. Donnio, B. Heinrich, B. Cukiernik, F.D. Guillon, D. Lyotropic behavior of diruthenium (II,III) alkoxybenzoates in dodecane |
| topic_facet |
Chemical analysis Complexation Electronic structure Melting Mixtures Nematic liquid crystals Paraffins Phase transitions Solutions Swelling Temperature Viscosity Diruthenium alkoxybenzoates Lyotropic behavior Melting point Nematic columnar mesophase Ruthenium compounds |
| description |
The lyotropic behavior of three mixed valence diruthenium(II,III) alkoxybenzoates in dodecane mixtures has been analyzed. The studied compounds, namely, Ru2(3,4,5-B3OC14)4Cl [1] (3,4,5-B3OC14 = 3,4,5-tri(n-tetradecyloxy)benzoate), Ru2(3,4-B2OC14)4Cl [2] (3,4-B2OC14 = 3,4-di(n-tetradecyloxy)benzoate), and Ru2(3,5-B2OC14)4Cl [3] (3,5-B2OC14 = 3,5-di(n-tetradecyloxy)benzoate), were investigated at three different temperatures (40, 70, and 100°C) for variable solvent concentrations (between 0 and 70 wt%). Mixing the complexes with up to 40-60 wt% of dodecane did not alter the nature of the low-temperature mesophase exhibited by the pure compound still showing a columnar hexagonal phase. However, it resulted in a substantial decrease of the viscosity for all of them and a depression of the melting point for [2]. For solvent concentrations greater than 40-60 wt% and high temperatures, the mixtures exhibited also a nematic columnar mesophase prior to the transition to the isotropic solution. At a structural level, the incorporation of solvent resulted in the swelling of the columns, leading to an increase of the intercolumnar distance up to a point where the columns lost their hexagonal order to give the columnar nematic phase. At higher concentrations of solvent, the mesophase dissolved into the solvent. |
| format |
JOUR |
| author |
Rusjan, M. Donnio, B. Heinrich, B. Cukiernik, F.D. Guillon, D. |
| author_facet |
Rusjan, M. Donnio, B. Heinrich, B. Cukiernik, F.D. Guillon, D. |
| author_sort |
Rusjan, M. |
| title |
Lyotropic behavior of diruthenium (II,III) alkoxybenzoates in dodecane |
| title_short |
Lyotropic behavior of diruthenium (II,III) alkoxybenzoates in dodecane |
| title_full |
Lyotropic behavior of diruthenium (II,III) alkoxybenzoates in dodecane |
| title_fullStr |
Lyotropic behavior of diruthenium (II,III) alkoxybenzoates in dodecane |
| title_full_unstemmed |
Lyotropic behavior of diruthenium (II,III) alkoxybenzoates in dodecane |
| title_sort |
lyotropic behavior of diruthenium (ii,iii) alkoxybenzoates in dodecane |
| url |
http://hdl.handle.net/20.500.12110/paper_07437463_v18_n26_p10116_Rusjan |
| work_keys_str_mv |
AT rusjanm lyotropicbehaviorofdirutheniumiiiiialkoxybenzoatesindodecane AT donniob lyotropicbehaviorofdirutheniumiiiiialkoxybenzoatesindodecane AT heinrichb lyotropicbehaviorofdirutheniumiiiiialkoxybenzoatesindodecane AT cukiernikfd lyotropicbehaviorofdirutheniumiiiiialkoxybenzoatesindodecane AT guillond lyotropicbehaviorofdirutheniumiiiiialkoxybenzoatesindodecane |
| _version_ |
1807322531026173952 |