Thermal phase behavior and ion hopping in a 1,2,4-triazolium perfluorobutanesulfonate protic organic ionic plastic crystal

2016 ◽  
Vol 18 (3) ◽  
pp. 2047-2053 ◽  
Author(s):  
Anirban Mondal ◽  
Anurag Prakash Sunda ◽  
Sundaram Balasubramanian
Keyword(s):  
Phase Behavior ◽  
Plastic Crystal ◽  
Rotator Phase ◽  
Thermal Phase

Rotator phase and ion hopping in a 1,2,4-triazolium perfluorobutanesulfonate POIPC.

A study of phase behavior and conductivity of mixtures of the organic ionic plastic crystal N-methyl-N-methyl-pyrrolidinium dicyanamide with sodium dicyanamide

2015 ◽  
Vol 272 ◽  
pp. 74-83 ◽  
Author(s):  
Tarekegn Chimdi ◽  
Daniel Gunzelmann ◽  
Jitraporn Vongsvivut ◽  
Maria Forsyth
Keyword(s):  
Phase Behavior ◽  
Plastic Crystal

scholarly journals Pretransitional Effects of the Isotropic Liquid–Plastic Crystal Transition

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 429
Author(s):  
Aleksandra Drozd-Rzoska ◽  
Szymon Starzonek ◽  
Sylwester J. Rzoska ◽  
Joanna Łoś ◽  
Zdravko Kutnjak ◽  
...  
Keyword(s):  
Phase Behavior ◽  
Dielectric Response ◽  
Plastic Crystal ◽  
Isotropic Liquid ◽  
Plastic Crystals ◽  
Smectic A ◽  
Crystal Melting ◽  
Crystal Transition ◽  
The One ◽  
Experimental Findings

We report on strong pretransitional effects across the isotropic liquid–plastic crystal melting temperature in linear and nonlinear dielectric response. Studies were carried out for cyclooctanol (C8H16O) in the unprecedented range of temperatures 120 K < T < 345 K. Such pretransitional effects have not yet been reported in any plastic crystals. Results include the discovery of the experimental manifestation of the Mossotti Catastrophe behavior, so far considered only as a hypothetical paradox. The model interpretations of experimental findings are proposed. We compare the observed pretransitional behavior with the one observed in octyloxycyanobiphenyl (8OCB), typical liquid crystal (LC), displaying a reversed sequence of phase transitions in orientational and translational degrees of order on varying temperature. Furthermore, in its nematic phase, we demonstrate first-ever observed temperature-driven crossover between regions dominated by isotropic liquid and smectic A pretransitional fluctuations. We propose a pioneering minimal model describing plastic crystal phase behavior where we mimic derivation of classical Landau-de Gennes-Ginzburg modeling of Isotropic-Nematic-Smectic A LC phase behavior.

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