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

• Tipo: Artigo em Revista Científica Internacional
• Data: 1999

Autores

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

Revista

Título: Liquid Crystals

Vol. 26

Páginas: 1805-1811

ISSN: 0267-8292

Editora: Taylor & Francis

Indexação

ISI Web of Knowledge - 6 Citações

Scopus - 5 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7