Thermal properties, crystal structures, and phase diagrams of ionic plastic crystals and ionic liquids containing a chiral cationic sandwich complex

Literature Information

Publication Date 2020-10-28
DOI 10.1039/D0CP04870D
Impact Factor 3.676
Authors

Ryo Sumitani, Tomoaki Yamazoe


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Abstract

To investigate the effects of chirality on the phase behavior of ionic plastic crystals and ionic liquids, salts of a chiral sandwich complex with various anions were synthesized. The synthesized salts have the general chemical formula [Ru(C5H5)(C6H5CHCH3OCH3)]X (X = CB11H12, CF3BF3, PF6, CPFSA (= CF2(SO2CF2)2N)), where the ruthenium complex possesses a chiral substituent. The racemates of the salts with the CB11H12, CF3BF3, and PF6 anions crystallized as a solid solution, racemic compound, and conglomerate, respectively. The (S)-enantiomer and the racemate of the CB11H12 salt exhibited phase transitions to the ionic plastic phase and melted at high temperatures. Further, this salt exhibited polymorphism, as crystallographically investigated. Most of the other salts were ionic liquids exhibiting no plastic phase. The CPFSA salt was liquid and exhibited glass transition at low temperatures.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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