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dc.contributor.author
Piro, Oscar Enrique  
dc.contributor.author
Echeverría, Gustavo Alberto  
dc.contributor.author
Cukiernik, Fabio Daniel  
dc.date.available
2018-06-25T21:00:40Z  
dc.date.issued
2018-01  
dc.identifier.citation
Piro, Oscar Enrique; Echeverría, Gustavo Alberto; Cukiernik, Fabio Daniel; Crystallography and the liquid crystal phase: a new approach to structural studies on a thermo-tropic smectic Schiff base; Taylor & Francis Ltd; Crystallography Reviews; 24; 1; 1-2018; 3-21  
dc.identifier.issn
1476-3508  
dc.identifier.uri
http://hdl.handle.net/11336/50010  
dc.description.abstract
In spite of the apparent contradiction between ‘liquid crystals’ (LC, materials exhibiting some degree of disorder) and ‘crystallography’ (a paradigmatic ordered kingdom), X-ray diffraction (XRD) studies make a substantial contribution to the field of LC. Focusing this review on smectic (Sm, lamellar) LC, we first describe how extremely careful XRD studies performed on mono-domain samples in the LC phase helped to elucidate the molecular structure of ordered Sm phases. Then, we describe selected examples in which single-crystal (SC) XRD on the solid-state phase of the mesogens provided information about their supra-molecular organization in the Sm phase. Finally, we present a different approach to this problem in the case of a thermo-tropic Schiff base (SB) which undergoes crystal ↔ LC ↔ isotropic liquid phase transformations. By combined SC and variable-temperature powder XRD, we show that the SB LC is a hexatic smectic B phase that derives from the crystal phase by relatively small topological changes promoted by the set-in of thermal rotational disorder around the long SB molecular axis.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Taylor & Francis Ltd  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Liquid Crystals  
dc.subject
Powder X-Ray Diffraction Vs. Temperature  
dc.subject
Schiff Base  
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Single-Crystal X-Ray Diffraction  
dc.subject
Smectic Mesophases  
dc.subject.classification
Astronomía  
dc.subject.classification
Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Crystallography and the liquid crystal phase: a new approach to structural studies on a thermo-tropic smectic Schiff base  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-06-25T16:14:05Z  
dc.identifier.eissn
0889-311X  
dc.journal.volume
24  
dc.journal.number
1  
dc.journal.pagination
3-21  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
Nueva York  
dc.description.fil
Fil: Piro, Oscar Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina  
dc.description.fil
Fil: Echeverría, Gustavo Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina  
dc.description.fil
Fil: Cukiernik, Fabio Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina  
dc.journal.title
Crystallography Reviews  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1080/0889311X.2017.1320550  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/0889311X.2017.1320550