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Liquid Crystals Volume 31, 2004 - Issue 7
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Original Articles

Mixed-valent diruthenium (II,III) aliphatic carboxylates: columnar mesophases in dodecylsulfate and octylsulfonate derivatives

Zulema Chaia INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pab. II, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
,
Andrés Zelcer INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pab. II, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
,
Bertrand Donnio Institut de Physique et Chimie des Matériaux de Strasbourg, Groupe des Matériaux Organiques (GMO-IPCMS), 23 Rue de Loess, BP43, 67034 Strasbourg Cedex 2, France
,
Marcia Rusjan INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pab. II, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
,
Fabio D. Cukiernik Corresponding author INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pab. II, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina; Instituto de Ciencias, Universidad Nacional de General Sarmiento, J. M. Gutierrez 1150, B1613GSX, Los Polvorines, Prov. Buenos Aires, Argentina
&
Daniel Guillon Institut de Physique et Chimie des Matériaux de Strasbourg, Groupe des Matériaux Organiques (GMO-IPCMS), 23 Rue de Loess, BP43, 67034 Strasbourg Cedex 2, France
Pages 1019-1025 | Received 10 Dec 2003, Accepted 12 Mar 2004, Published online: 29 Sep 2011
 
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Abstract

Two series of polymeric mixed-valent diruthenium (II,III) aliphatic carboxylates of formula Ru2[O2C(CH2) n−2CH3]4X (where X=dodecylsulfate (DOS) anion and n=8, 9, 16 and 18, or X=octylsulfonate (OS) anion and n=8, 10, 12, 14 and 18) were synthesized and characterized. Their liquid crystalline properties and crystalline (Cr) structures were analysed; the Cr phases are lamellar in all cases. For long chain DOS derivatives (n=16 and 18) hexagonal and rectangular columnar mesophases (Colh and Colr) with melting temperatures close to 140°C were observed. For long chain OS derivatives (n≥10) a Colh mesophase was observed, with melting temperatures between 140 and 190°C.

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