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Abstract:

Tetra(alkoxybenzoato)dirhodium(II) complexes of the formula Rh2(x,y,z-BmOCn)4 (where B is the benzoate group; m is the number of alkoxy chains on the aromatic ring; x, y, and z are their positions of anchoring; and n is the number of carbon atoms in each alkoxy chain) and the corresponding pyrazine adducts have been synthesized and characterized. The pyrazine adducts were prepared to have a polymeric structure via connected metallic centers. The complexes synthesized are Rh2(3,4,5-B3OCn)4 for n = 8, 10, 14, and 18; Rh2(3,4-B2OCn)4 for n = 9, 14, and 18; and Rh2(3,5-B2OCn)4 for n = 9 and 18, as well as the corresponding pyrazine adducts [Rh2(3,4,5-B3OCn)4pz]x for n = 10, 14, and 18; [Rh2(3,4-B2OCn)4pz]x for n = 14 and 18; and [Rh2(3,5-B2OCn)4pz]x for n = 9 and 18. Their liquid-crystalline (LC) properties have been analyzed. Most of them exhibit LC columnar and cubic mesophases with melting transition temperatures close to or even below room temperature. The mesomorphic character of the pyrazinic compounds, compared to the nonmesomorphic aliphatic carboxylate analogues, can be interpreted in terms of the ability of the equatorial ligands to fill the interdimeric space efficiently. Some internal characteristics about the arrangement of the molecules inside the columns are discussed.

Registro:

Documento: Artículo
Título:Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts
Autor:Rusjan, M.; Donnio, B.; Guillon, D.; Cukiernik, F.D.
Filiación:INQUIMAE, Dept. de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, Núnez, Argentina
Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 (CNRS-ULP), Groupe des Matériaux Organiques, 23 rue du Loess, 67037 Strasbourg Cedex, France
Instituto de Ciencias, Universidad Nacional de General Sarmiento, Roca 850, San Miguel (1663), Provincia de Buenos Aires, Argentina
Palabras clave:carboxylic acid derivative; pyrazine derivative; rhodium complex; tetra(benzoato)dirhodium complex; unclassified drug; article; complex formation; crystal structure; liquid crystal; melting point; structure analysis; synthesis; temperature dependence
Año:2002
Volumen:14
Número:4
Página de inicio:1564
Página de fin:1575
DOI: http://dx.doi.org/10.1021/cm0109995
Título revista:Chemistry of Materials
Título revista abreviado:Chem. Mater.
ISSN:08974756
CODEN:CMATE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v14_n4_p1564_Rusjan

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Citas:

---------- APA ----------
Rusjan, M., Donnio, B., Guillon, D. & Cukiernik, F.D. (2002) . Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts. Chemistry of Materials, 14(4), 1564-1575.
http://dx.doi.org/10.1021/cm0109995
---------- CHICAGO ----------
Rusjan, M., Donnio, B., Guillon, D., Cukiernik, F.D. "Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts" . Chemistry of Materials 14, no. 4 (2002) : 1564-1575.
http://dx.doi.org/10.1021/cm0109995
---------- MLA ----------
Rusjan, M., Donnio, B., Guillon, D., Cukiernik, F.D. "Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts" . Chemistry of Materials, vol. 14, no. 4, 2002, pp. 1564-1575.
http://dx.doi.org/10.1021/cm0109995
---------- VANCOUVER ----------
Rusjan, M., Donnio, B., Guillon, D., Cukiernik, F.D. Liquid-crystalline materials based on rhodium carboxylate coordination polymers: Synthesis, characterization and mesomorphic properties of tetra(alkoxybenzoato)dirhodium(II) complexes and their pyrazine adducts. Chem. Mater. 2002;14(4):1564-1575.
http://dx.doi.org/10.1021/cm0109995