Phase transition sequence in the chiral compound 10FHBBBM7*studied by Raman scattering

• Type: Article in International Scientific Journal
• Date: 1999

Authors

Yuzyuk, YI (Author) Other; Sarmento, S (Author) Other; Carvalho, PS (Author) FCUP; Almeida, A (Author) FCUP; Pinto, F (Author) Other; Chaves, MR (Author) FCUP; Nguyen, HT (Author) Other

Journal

Title: Liquid Crystals

Vol. 26

Pages: 1805-1811

ISSN: 0267-8292

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 5 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-001-2QZ

DOI: 10.1080/026782999203436

Abstract (EN): Integrated Raman intensity of the stretching mode of the phenyl rings as a function of temperature has been studied in order to determine the phase sequence in a new liquid crystalline compound. It is shown that the Raman technique provides the identification of the phase transitions, although some of them were not observed by macroscopic techniques. In particular, two ferrielectric phases were found from Raman measurements between the SmC* and the SmCA* phases, while by DSC and by dielectric measurements only one phase could be detected. A detailed Raman study under d.c. electric field has shown that in this compound the Raman intensity is weakly influenced by the appearance of disclination lines.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7