ENANTIOTROPIC AND MONOTROPIC TRANSITIONS OF THE DISCOTIC MESOGEN 5,10,15,20-TETRAKIS(4-N-DODECYLPHENYL)PORPHYRIN UNDER PRESSURE

Authors
MAEDA Y SHIMIZU Y
Citation
Y. Maeda et Y. Shimizu, ENANTIOTROPIC AND MONOTROPIC TRANSITIONS OF THE DISCOTIC MESOGEN 5,10,15,20-TETRAKIS(4-N-DODECYLPHENYL)PORPHYRIN UNDER PRESSURE, Liquid crystals, 25(4), 1998, pp. 537-542
Citations number
11
Categorie Soggetti
Crystallography
Journal title
Liquid crystals → ACNP
ISSN journal
02678292
Volume
25
Issue
4
Year of publication
1998
Pages
537 - 542
Database
ISI
SICI code
0267-8292(1998)25:4<537:EAMTOT>2.0.ZU;2-N
Abstract
The crystal and mesophase transitions of the discotic material 5,10,15 ,20-tetrakis (4-n-dodecylphenyl)porphyrin have been studied by high pr essure DTA and wide angle X-ray diffraction. At lower pressures, the d iscotic lamellar (D-L) phase is enantiotropic, but at higher pressures above a critical point determined as 240MPa and 170 degrees C the D-L phase is monotropic.