On relaxation and vibrational dynamics in the thermodynamic states of a chiral smectogenic glass-former

Abstract

The complex relaxation dynamics in the identified thermodynamic states of a chiral smectogenic glass-former was studied.

Insight into cold- and melt crystallization phenomena of a smectogenic liquid crystal

“…These results were presented in ref. 29 and here the temperature region of the cold crystallization occurrence is shown in Fig. 3.…”

“…The cold crystallization under non-isothermal conditions was studied on the basis of the results described in ref. 29 obtained for the sample cooled and heated with several rates (±1, ±2, ±3, ±4, ±5, ±8, ±10, ±15, ±20, ±25 and ±30) K min −1 in the temperature range from 173 K to 403 K. Before performing the experiments, the DSC instrument was calibrated using indium and sapphire standards.…”

“…0.4 cm −1 , 64 scans and sample environment as in ref. 29) were taken with the aim to analyse the vibrational dynamics during the melt crystallization under isothermal conditions. The sample in the form of thin film was placed between two zinc selenide ZnSe window discs, next it was cooled from the isotropic phase to one of the T mc temperatures ( T mc = 272, 275 and 278 K) with a rate of 5 K min −1 and was kept at T mc temperature for 60 minutes until the full melt crystallization process was completed.…”

“…A detailed description of the obtained results can be found in ref. 29. It has been shown that the compound under study exhibits the following phase sequence (Fig.…”

Investigation of Chiral Smectic Phases and Conformationally Disordered Crystal Phases of the Liquid Crystalline 3F5FPhH6 Compound Partially Fluorinated at the Terminal Chain and Rigid Core

“…The experimental points near the kink are not situated exactly between the calculated lines, as was obtained for similar compounds. 13 , 60 However, the deviations for 3F5FPhH6 are not significant, as they are of ca. 0.1 on the Y axis for the P L -process and of ca.…”