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Cukiernik, F.D.; Ibn-Elhaj, M.; Chaia, Z.D.; Marchon, J.-C.; Giroud-Godquin, A.-M.; Guillon, D.; Skoulios, A.; Maldivi, P. "Mixed-Valent Diruthenium (II,III) Long-Chain Carboxylates. 1. Molecular Design of Columnar Liquid-Crystalline Order" (1998) Chemistry of Materials. 10(1):83-91
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Abstract:

Six series of binuclear mixed-valent diruthenium tetracarboxylates of formula Ru2(O2CR)4X, containing different combinations of equatorial carboxylates (RCO2-) and anions (X-) have been synthesized and characterized, and their liquid-crystalline properties have been examined by optical microscopy under polarized light, differential scanning calorimetry, and powder X-ray diffraction studies. Three series derived from linear aliphatic carboxylates, Ru2(O2C-(CH2)n-2-CH 3)4X with X = Cl (n = 5-9, 12, 16), X = O2C-R (R = (CH2)n-2-CH3, n = 6-12, 14, 15, 16), and X = DOS (DOS = dodecyl sulfate, n = 6, 8, 9, 12, 16, 18), were studied. The nature of the counterion X strongly affects the appearance of the liquid-crystalline order: the chloro complexes are not mesomorphic, whereas the complexes with RCO2 or DOS anions exhibit a columnar hexagonal mesophase above ca. 150°C. A structural model for the mesophase of the Ru2(O2C-(CH2)n-2-CH 3)5 series is proposed. Three other types of Ru2(O2CR)4X complexes were obtained with a 3,4-dialkoxybenzoate as equatorial ligand (RCO2 = 3,4-(CH3(CH2)n-1O)2PhCO2) and with X=Cl (n = 12, 15, 16), X = RCO2 (n = 12, 15, 16) and X = DOS (n = 12, 15, 16). All complexes of the three latter types are mesogenic, with transition temperatures lower than those found for the aliphatic analogues, and the pentakis(dialkoxybenzoate) derivatives are liquid crystalline at room temperature, indicating that the nature of the equatorial ligands is also a determinant of the mesogenic character. The results are interpreted in terms of the ability of the axial and equatorial ligands to efficiently fill the interdimeric space, thereby creating adequate conditions for columnar order.

Registro:

Documento: Artículo
Título:Mixed-Valent Diruthenium (II,III) Long-Chain Carboxylates. 1. Molecular Design of Columnar Liquid-Crystalline Order
Autor:Cukiernik, F.D.; Ibn-Elhaj, M.; Chaia, Z.D.; Marchon, J.-C.; Giroud-Godquin, A.-M.; Guillon, D.; Skoulios, A.; Maldivi, P.
Filiación:INQUIMAE, Depto. Quim. Inorg., Analitica y Q., Universidad de Buenos Aires, Nuñez (1428) Capital Federal, Argentina
Dept. Rech. Fond. sur Matiere Cond., Serv. de Chim. Inorg. et Biologique, CEA/Grenoble, 17 Rue des Martyrs, 38054 Grenoble Cedex 9, France
Grp. des Matériaux Organiques, Inst. Phys. Chim. Mat. de Strasbourg, 23 Rue du Loess, 67037 Strasbourg Cedex, France
Año:1998
Volumen:10
Número:1
Página de inicio:83
Página de fin:91
DOI: http://dx.doi.org/10.1021/cm970231d
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_v10_n1_p83_Cukiernik

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Citas:

---------- APA ----------
Cukiernik, F.D., Ibn-Elhaj, M., Chaia, Z.D., Marchon, J.-C., Giroud-Godquin, A.-M., Guillon, D., Skoulios, A.,..., Maldivi, P. (1998) . Mixed-Valent Diruthenium (II,III) Long-Chain Carboxylates. 1. Molecular Design of Columnar Liquid-Crystalline Order. Chemistry of Materials, 10(1), 83-91.
http://dx.doi.org/10.1021/cm970231d
---------- CHICAGO ----------
Cukiernik, F.D., Ibn-Elhaj, M., Chaia, Z.D., Marchon, J.-C., Giroud-Godquin, A.-M., Guillon, D., et al. "Mixed-Valent Diruthenium (II,III) Long-Chain Carboxylates. 1. Molecular Design of Columnar Liquid-Crystalline Order" . Chemistry of Materials 10, no. 1 (1998) : 83-91.
http://dx.doi.org/10.1021/cm970231d
---------- MLA ----------
Cukiernik, F.D., Ibn-Elhaj, M., Chaia, Z.D., Marchon, J.-C., Giroud-Godquin, A.-M., Guillon, D., et al. "Mixed-Valent Diruthenium (II,III) Long-Chain Carboxylates. 1. Molecular Design of Columnar Liquid-Crystalline Order" . Chemistry of Materials, vol. 10, no. 1, 1998, pp. 83-91.
http://dx.doi.org/10.1021/cm970231d
---------- VANCOUVER ----------
Cukiernik, F.D., Ibn-Elhaj, M., Chaia, Z.D., Marchon, J.-C., Giroud-Godquin, A.-M., Guillon, D., et al. Mixed-Valent Diruthenium (II,III) Long-Chain Carboxylates. 1. Molecular Design of Columnar Liquid-Crystalline Order. Chem. Mater. 1998;10(1):83-91.
http://dx.doi.org/10.1021/cm970231d