Thermal decomposition of mixed-valent diruthenium pentakis(alkanoates) enhanced by their liquid crystalline state

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The thermal decomposition of mixed-valent diruthenium pentakis(alkanoates) of general formula Ru2 (II,III)(O2C(CH2)n-2CH3)5 (for n = 3, 4, 5, 6, 8, 10, 12, 16), studied by a combination of several complementary physicochemical techniques, has been found to take place in two differentiated steps. The...

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Autores principales: Rusjan, M.C., Sileo, E.E., Cukiernik, F.D.
Formato: JOUR
Materias:
Agglomeration
High temperature effects
Liquid crystals
Oxidation
Pyrolysis
Oxidative decarboxylation
Ruthenium carboxylate
Thermolysis
Ruthenium compounds
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01672738_v124_n1_p143_Rusjan
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_01672738_v124_n1_p143_Rusjan2023-10-03T15:04:32Z Thermal decomposition of mixed-valent diruthenium pentakis(alkanoates) enhanced by their liquid crystalline state Rusjan, M.C. Sileo, E.E. Cukiernik, F.D. Agglomeration High temperature effects Liquid crystals Oxidation Pyrolysis Oxidative decarboxylation Ruthenium carboxylate Thermolysis Ruthenium compounds The thermal decomposition of mixed-valent diruthenium pentakis(alkanoates) of general formula Ru2 (II,III)(O2C(CH2)n-2CH3)5 (for n = 3, 4, 5, 6, 8, 10, 12, 16), studied by a combination of several complementary physicochemical techniques, has been found to take place in two differentiated steps. The first one gives the divalent analogues Ru2 (II,II)(O2C(CH2)n-2CH3)4 as the main product, in a one-electron reduction of the bimetallic core likely provided by oxidative decarboxylation of the axial anion. The second one involves the reduction of the binuclear core to metallic ruthenium, and the oxidation of the equatorial carboxylates. The first step is very much influenced by the aggregation state of the system, the occurrence of a liquid-crystalline phase in compounds with n>6 facilitates the thermolysis: decomposition temperatures fall from ≈300 °C for compounds with n = 3 to ≈175 °C for compounds with n = 10-16. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01672738_v124_n1_p143_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 Agglomeration
High temperature effects
Liquid crystals
Oxidation
Pyrolysis
Oxidative decarboxylation
Ruthenium carboxylate
Thermolysis
Ruthenium compounds
spellingShingle Agglomeration
High temperature effects
Liquid crystals
Oxidation
Pyrolysis
Oxidative decarboxylation
Ruthenium carboxylate
Thermolysis
Ruthenium compounds
Rusjan, M.C.
Sileo, E.E.
Cukiernik, F.D.
Thermal decomposition of mixed-valent diruthenium pentakis(alkanoates) enhanced by their liquid crystalline state
topic_facet Agglomeration
High temperature effects
Liquid crystals
Oxidation
Pyrolysis
Oxidative decarboxylation
Ruthenium carboxylate
Thermolysis
Ruthenium compounds
description The thermal decomposition of mixed-valent diruthenium pentakis(alkanoates) of general formula Ru2 (II,III)(O2C(CH2)n-2CH3)5 (for n = 3, 4, 5, 6, 8, 10, 12, 16), studied by a combination of several complementary physicochemical techniques, has been found to take place in two differentiated steps. The first one gives the divalent analogues Ru2 (II,II)(O2C(CH2)n-2CH3)4 as the main product, in a one-electron reduction of the bimetallic core likely provided by oxidative decarboxylation of the axial anion. The second one involves the reduction of the binuclear core to metallic ruthenium, and the oxidation of the equatorial carboxylates. The first step is very much influenced by the aggregation state of the system, the occurrence of a liquid-crystalline phase in compounds with n>6 facilitates the thermolysis: decomposition temperatures fall from ≈300 °C for compounds with n = 3 to ≈175 °C for compounds with n = 10-16.
format JOUR
author Rusjan, M.C.
Sileo, E.E.
Cukiernik, F.D.
author_facet Rusjan, M.C.
Sileo, E.E.
Cukiernik, F.D.
author_sort Rusjan, M.C.
title Thermal decomposition of mixed-valent diruthenium pentakis(alkanoates) enhanced by their liquid crystalline state
title_short Thermal decomposition of mixed-valent diruthenium pentakis(alkanoates) enhanced by their liquid crystalline state
title_full Thermal decomposition of mixed-valent diruthenium pentakis(alkanoates) enhanced by their liquid crystalline state
title_fullStr Thermal decomposition of mixed-valent diruthenium pentakis(alkanoates) enhanced by their liquid crystalline state
title_full_unstemmed Thermal decomposition of mixed-valent diruthenium pentakis(alkanoates) enhanced by their liquid crystalline state
title_sort thermal decomposition of mixed-valent diruthenium pentakis(alkanoates) enhanced by their liquid crystalline state
url http://hdl.handle.net/20.500.12110/paper_01672738_v124_n1_p143_Rusjan
work_keys_str_mv AT rusjanmc thermaldecompositionofmixedvalentdirutheniumpentakisalkanoatesenhancedbytheirliquidcrystallinestate
AT sileoee thermaldecompositionofmixedvalentdirutheniumpentakisalkanoatesenhancedbytheirliquidcrystallinestate
AT cukiernikfd thermaldecompositionofmixedvalentdirutheniumpentakisalkanoatesenhancedbytheirliquidcrystallinestate
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