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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Autores principales: Rusjan, M., Donnio, B., Heinrich, B., Cukiernik, F.D., Guillon, D.
Formato: JOUR
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Acceso en línea:http://hdl.handle.net/20.500.12110/paper_07437463_v18_n26_p10116_Rusjan
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spelling 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
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AT cukiernikfd lyotropicbehaviorofdirutheniumiiiiialkoxybenzoatesindodecane
AT guillond lyotropicbehaviorofdirutheniumiiiiialkoxybenzoatesindodecane
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