scholarly journals Effect of substituents and anions on the phase behavior of Ru(ii) sandwich complexes: exploring the boundaries between ionic liquids and ionic plastic crystals

2017 ◽  
Vol 19 (6) ◽  
pp. 4352-4359 ◽  
Author(s):  
Takumi Tominaga ◽  
Takahiro Ueda ◽  
Tomoyuki Mochida
Keyword(s):  
Ionic Liquids ◽  
Phase Behavior ◽  
Plastic Crystal ◽  
Sandwich Complexes ◽  
Plastic Crystals ◽  
Effect Of Substituents ◽  
Crystal Phases

Salts of cationic ruthenium sandwich complexes bearing ethyl or longer substituents are ionic liquids, whereas salts with shorter substituents showed ionic plastic crystal phases.

scholarly journals Formation of a solid solution between [N(C2H5)4][BF4] and [N(C2H5)4][PF6] in crystal and plastic crystal phases

2017 ◽  
Vol 19 (3) ◽  
pp. 2053-2059 ◽  
Author(s):  
Kazuhiko Matsumoto ◽  
Ryojun Nonaka ◽  
Yushen Wang ◽  
Gleb Veryasov ◽  
Rika Hagiwara
Keyword(s):  
Solid Solution ◽  
Binary System ◽  
Rock Salt ◽  
Plastic Crystal ◽  
Plastic Crystals ◽  
System Form ◽  
Crystal Phases ◽  
Form Solid Solution

The [N(C2H5)4][BF4]–[N(C2H5)4][PF6] binary system form solid solution in both crystal and plastic crystal phases (rock-salt type for plastic crystals).

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.

scholarly journals Predicting gas selectivity in organic ionic plastic crystals by free energy calculations

RSC Advances ◽  
2021 ◽  
Vol 11 (32) ◽  
pp. 19623-19629
Author(s):  
Vinay S. Kandagal ◽  
Jennifer M. Pringle ◽  
Maria Forsyth ◽  
Fangfang Chen
Keyword(s):  
Free Energy ◽  
Gas Separation ◽  
Free Energy Calculations ◽  
Free Energy Calculation ◽  
Energy Calculation ◽  
Plastic Crystal ◽  
Plastic Crystals ◽  
New Type ◽  
Gas Molecules ◽  
Gas Selectivity

The free energy calculation shows the different free energy changes of the adsorption and absorption of gas molecules into an organic ionic plastic crystal, successfully predicting the gas selectivity of this new type of gas separation material.

Thermodynamic Phase Behavior of Ionic Liquids

2007 ◽  
Vol 52 (5) ◽  
pp. 1872-1880 ◽  
Author(s):  
Urszula Domańska ◽  
Zuzanna Żołek-Tryznowska ◽  
Marek Królikowski
Keyword(s):  
Ionic Liquids ◽  
Phase Behavior ◽  
Thermodynamic Phase

Solidification of Ionic Liquids: Theory and Techniques

2010 ◽  
Vol 63 (4) ◽  
pp. 544 ◽  
Author(s):  
Anja-Verena Mudring
Keyword(s):  
Phase Transition ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Solid Phase ◽  
Soft Materials ◽  
Separation Science ◽  
Vast Number ◽  
Plastic Crystals ◽  
Thermal Fluids ◽  
Solid Phase Transition

Ionic liquids (ILs) have become an important class of solvents and soft materials over the past decades. Despite being salts built by discrete cations and anions, many of them are liquid at room temperature and below. They have been used in a wide variety of applications such as electrochemistry, separation science, chemical synthesis and catalysis, for breaking azeotropes, as thermal fluids, lubricants and additives, for gas storage, for cellulose processing, and photovoltaics. It has been realized that the true advantage of ILs is their modular character. Each specific cation–anion combination is characterized by a unique, characteristic set of chemical and physical properties. Although ILs have been known for roughly a century, they are still a novel class of compounds to exploit due to the vast number of possible ion combinations and one fundamental question remains still inadequately answered: why do certain salts like ILs have such a low melting point and do not crystallize readily? This Review aims to give an insight into the liquid–solid phase transition of ILs from the viewpoint of a solid-state chemist and hopes to contribute to a better understanding of this intriguing class of compounds. It will introduce the fundamental theories of liquid–solid-phase transition and crystallization from melt and solution. Aside form the formation of ideal crystals the development of solid phases with disorder and of lower order like plastic crystals and liquid crystals by ionic liquid compounds are addressed. The formation of ionic liquid glasses is discussed and finally practical techniques, strategies and methods for crystallization of ionic liquids are given.

Phase behavior of mixtures of ionic liquids and organic solvents

2010 ◽  
Vol 55 (2) ◽  
pp. 833-845 ◽  
Author(s):  
Jens Abildskov ◽  
Martin D. Ellegaard ◽  
John P. O’Connell
Keyword(s):  
Ionic Liquids ◽  
Phase Behavior ◽  
Organic Solvents
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