13C NMR relaxation and reorientation dynamics in imidazolium-based ionic liquids: revising interpretation
文献信息
Petri Ingman, Erkki Lähderanta
The temperature dependencies of 13C NMR relaxation rates in [bmim]PF6 ionic liquid have been measured and the characteristic times (τc) for the cation reorientation have been recalculated. We found the origin of the incorrect τc temperature dependencies that were earlier reported for ring carbons in a number of imidazolium-based ILs. After a correction of the approach 13C T1, the relaxation data allowed us to obtain the characteristic times for an orientation mobility of each carbon, and a complicated experiment, such as NOE, was not required. Thus the applicability of 13C NMR relaxation rate measurements to the calculation of the characteristic times for reorientation of all the carbons of the [bmim]+ cation was confirmed and our findings have shown that a 13C NMR relaxation technique allowed its application to ionic liquids to be equally successful as for other liquid systems.
期刊推荐

Heteroatom Chemistry

Polycyclic Aromatic Compounds

Atomization and Sprays

Herald of the Russian Academy of Sciences

Journal of the Indian Institute of Science

Journal of Asian Natural Products Research

Main Group Chemistry

Critical Reviews in Solid State and Materials Sciences

Bioorganic & Medicinal Chemistry

Colloid Journal
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Physical Chemistry Chemical Physics

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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