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Chaia, Z.D.; Rusjan, M.C.; Castro, M.A.; Donnio, B.; Heinrich, B.; Guillon, D.; Baggio, R.F.; Cukiernik, F.D. "Supramolecular architecture elucidation of the room temperature columnar mesophases exhibited by mixed-valent diruthenium alkoxybenzoates" (2009) Journal of Materials Chemistry. 19(28):4981-4991
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Abstract:

Three series of mesogenic coordination polymers based on mixed-valent diruthenium tetracarboxylates, namely Ru 2 (3,4-B2OCn) 4 Cl, Ru 2 (3,5-B2OCn) 4 Cl and Ru 2 (3,4,5-B3OCn) 4 Cl [3,4-B2OCn = 3,4-(C n H 2n+1 O) 2 C 6 H 3 CO 2 - , 3,5-B2OCn = 3,5-(C n H 2n+1 O) 2 C 6 H 3 CO 2 - and 3,4,5-B3OCn = 3,4,5-(C n H 2n+1 O) 3 C 6 H 2 CO 2 - ] have been synthesized and characterized, with the aim of obtaining columnar liquid crystalline phases. These equatorial BmOCn ligands have been selected under the assumption that they will efficiently fill the intermolecular space around the axial Cl atoms, thus warranting a parallel arrangement of the polymeric ⋯Ru 2 -Cl-Ru 2 -Cl⋯ strands in the crystalline phase, which should facilitate the occurrence of Col mesophases. The liquid crystalline character of the synthesized compounds has been studied by means of polarized optical microscopy, differential scanning calorimetry, and variable temperature X-ray diffraction. They all exhibit thermotropic Col H mesophases, the 3,4-B2OCn derivatives also exhibit a lamellar mesophase. Many of the studied compounds exhibit room temperature mesomorphism. The thermal stability domain of the Col H mesophases of the 3,5-B2OCn and 3,4,5-B3OCn derivatives is remarkably wide, from below 0 °C to ca. 300 °C in some cases. Based on pieces of structural information coming from XRD experiments, dilatometry, and local probes (magnetic susceptibility measurements, resonance Raman and IR spectroscopies, and Exafs) we suggest a model for the structural arrangement of the polymeric strands in the mesophase, in which the central polar backbone of the polymeric strands is in a zig-zag conformation, surrounded by a continuum of molten aliphatic chains. A crystallographic study of the non-mesogenic light homologue Ru 2 (3,4,5-B3OC2) 4 Cl confirms these aspects of the model, and shows the predicted preorganization of the polymeric strands in the crystalline phase. © 2009 The Royal Society of Chemistry.

Registro:

Documento: Artículo
Título:Supramolecular architecture elucidation of the room temperature columnar mesophases exhibited by mixed-valent diruthenium alkoxybenzoates
Autor:Chaia, Z.D.; Rusjan, M.C.; Castro, M.A.; Donnio, B.; Heinrich, B.; Guillon, D.; Baggio, R.F.; Cukiernik, F.D.
Filiación:INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), 23 rue de Loess, 67034 Strasbourg Cedex 2, France
Instituto de Ciencias, Universidad Nacional de General Sarmiento, J. M. Gutierrez 1150, B1613GSX Los Polvorines, Prov. Buenos Aires, Argentina
Departamento de Física, Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499, (1650) San Martín, Prov. Buenos Aires, Argentina
Water Purification Supplies, Dervich, 3149 John P. Curce Dr. Bldg. 1A, Bay 4, Pembroke Park, FL 33009, United States
Laboratorios Raffo, Agustín Alvarez 4845, B1603APO, Villa Marteli, Buenos Aires, Argentina
Palabras clave:Aliphatic chains; Cl atoms; Columnar mesophases; Coordination Polymers; Crystalline phase; Crystallographic studies; Dilatometry; Diruthenium; EXAFS; Intermolecular space; IR spectroscopy; Lamellar mesophases; Liquid-crystalline; Liquid-crystalline phasis; Local probes; Magnetic susceptibility measurements; Mesogenics; Mesophases; Mixed-valent; Parallel arrangement; Polarized optical microscopy; Preorganization; Resonance Raman; Room temperature; Structural arrangement; Structural information; Supramolecular architectures; Thermal stability; Variable temperature; XRD; Zig-zag; Crystalline materials; Differential scanning calorimetry; Liquids; Magnetic susceptibility; Optical microscopy; Ruthenium compounds; X ray diffraction; Polymers
Año:2009
Volumen:19
Número:28
Página de inicio:4981
Página de fin:4991
DOI: http://dx.doi.org/10.1039/b900779b
Título revista:Journal of Materials Chemistry
Título revista abreviado:J. Mater. Chem.
ISSN:09599428
CODEN:JMACE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09599428_v19_n28_p4981_Chaia

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Citas:

---------- APA ----------
Chaia, Z.D., Rusjan, M.C., Castro, M.A., Donnio, B., Heinrich, B., Guillon, D., Baggio, R.F.,..., Cukiernik, F.D. (2009) . Supramolecular architecture elucidation of the room temperature columnar mesophases exhibited by mixed-valent diruthenium alkoxybenzoates. Journal of Materials Chemistry, 19(28), 4981-4991.
http://dx.doi.org/10.1039/b900779b
---------- CHICAGO ----------
Chaia, Z.D., Rusjan, M.C., Castro, M.A., Donnio, B., Heinrich, B., Guillon, D., et al. "Supramolecular architecture elucidation of the room temperature columnar mesophases exhibited by mixed-valent diruthenium alkoxybenzoates" . Journal of Materials Chemistry 19, no. 28 (2009) : 4981-4991.
http://dx.doi.org/10.1039/b900779b
---------- MLA ----------
Chaia, Z.D., Rusjan, M.C., Castro, M.A., Donnio, B., Heinrich, B., Guillon, D., et al. "Supramolecular architecture elucidation of the room temperature columnar mesophases exhibited by mixed-valent diruthenium alkoxybenzoates" . Journal of Materials Chemistry, vol. 19, no. 28, 2009, pp. 4981-4991.
http://dx.doi.org/10.1039/b900779b
---------- VANCOUVER ----------
Chaia, Z.D., Rusjan, M.C., Castro, M.A., Donnio, B., Heinrich, B., Guillon, D., et al. Supramolecular architecture elucidation of the room temperature columnar mesophases exhibited by mixed-valent diruthenium alkoxybenzoates. J. Mater. Chem. 2009;19(28):4981-4991.
http://dx.doi.org/10.1039/b900779b