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Title

The SmA phase of a bent-core V-shaped compound: structure and electric-field response

AuthorsAlonso, Ibon; Martínez-Perdiguero, J.; Ortega, Josu; Folcia, César L.; Etxebarria, Jesús; Gimeno, Nélida; Ros, M. Blanca
KeywordsV-shaped molecule
Second harmonic generation
X-ray
Phase transition
Issue Date2010
PublisherTaylor & Francis
CitationLiquid Crystals 37(11): 1465-1470 (2010)
AbstractThe smectic A (SmA) phase of a V-shaped mesogen with a molecular bending angle of 60° was studied. According to X-ray measurements, the molecules are arranged with the ‘bow-string’ direction parallel to the smectic layer. This point was confirmed by birefringence analysis and the result is compatible with a non-polar structure. A detailed study of the (001) smectic layer reflection versus temperature was also carried out to determine the smectic translational order parameter. The results indicate that the material presents a high degree of translational order. In addition, the electric field response of the material was studied by means of second harmonic generation. This technique turned out to be highly sensitive to small structural distortions due to the V-shape of the constituent molecules.
Publisher version (URL)http://dx.doi.org/10.1080/02678292.2010.521858
URIhttp://hdl.handle.net/10261/56007
DOI10.1080/02678292.2010.521858
ISSN0267-8292
E-ISSN1366-5855
Appears in Collections:(ICMA) Artículos
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