Vitrification of the smectic C phase and kinetics of cold crystallization investigated for a fluorinated compound with a chiral centre based on ()-(+)-3-octanol

The formation of glass of the anticlinic high-tilted smectic C A * phase even at low cooling rates (≥2 K min −1 ) is reported for ( S )-4′-(1-ethylhexyloxycarbonyl)biphenyl-4-yl 4-[5-(2,2,3,3,4,4,4-heptafluorobutoxy)pentyl-1-oxy]benzoate. The kinetics of crystallization is investigated via different...

Full description

Saved in:
Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2023-05, Vol.25 (17), p.12379-12393
Main Authors: Deptuch, Aleksandra, Lelito, Artur, Juszy ska-Ga zka, Ewa, Jasiurkowska-Delaporte, Ma gorzata, Urba ska, Magdalena
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The formation of glass of the anticlinic high-tilted smectic C A * phase even at low cooling rates (≥2 K min −1 ) is reported for ( S )-4′-(1-ethylhexyloxycarbonyl)biphenyl-4-yl 4-[5-(2,2,3,3,4,4,4-heptafluorobutoxy)pentyl-1-oxy]benzoate. The kinetics of crystallization is investigated via differential scanning calorimetry, polarizing optical microscopy and broadband dielectric spectroscopy. The temperature region of the largest crystallization rate, the activation energy of cold crystallization and the energy barrier of nucleation are determined. The coupling of the characteristic crystallization time with the α-relaxation time is studied. A high fragility index equal to 139 is obtained for this glassformer. Comparison with a very similar glassforming compound, with the chiral centre based on ( S )-(+)-2-octanol instead of ( S )-(+)-3-octanol, is presented. The formation of glass of the anticlinic high-tilted smectic C A * phase even at low cooling rates (≥2 K min −1 ) is reported for ( S )-4′-(1-ethylhexyloxycarbonyl)biphenyl-4-yl 4-[5-(2,2,3,3,4,4,4-heptafluorobutoxy)pentyl-1-oxy]benzoate.
ISSN:1463-9076
1463-9084
DOI:10.1039/d3cp01255g