Synthesis and thermotropic studies of a new series of teraryl liquid crystals 2-(4'-alkoxybiphen-4-yl)-5-cyanopyridines.
Int J Mol Sci
; 14(9): 18809-23, 2013 Sep 12.
Article
em En
| MEDLINE
| ID: mdl-24036442
ABSTRACT
A new series of teraryl 2-(4'-alkoxybiphen-4-yl)-5-cyanopyridines (nO-PPPyCN, n = 2-8) compounds, bearing a cyanopyridine terminus, were synthesized using a short 2-step reaction with overall yields between 33% and 69%. Spectral analyses were in accord with the expected structures. Thermotropic behavior of the teraryl compounds was investigated using polarised optical microscopy and differential scanning calorimetry. All compounds exhibited both enantiotropic nematic and smectic A phases, with an additional enantiotropic smectic C phase when n = 7 and 8. Polymesomorphism appears to be a common behavior in this series of linear liquid crystal compounds.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Piridinas
/
Cristais Líquidos
Idioma:
En
Revista:
Int J Mol Sci
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Taiwan