Dimers of cyclic carbonates: chirality recognition in battery solvents and energy storage

Dimers of ethylene carbonate and propylene carbonate are created in supersonic jet expansions and characterized by FTIR spectroscopy. Fermi resonances are switched on and off by dimerization. There is a unique centrosymmetric dimer of ethylene carbonate in a pronounced case of complementary chiralit...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2011-01, Vol.13 (31), p.14176-14182
Main Authors: Kollipost, Franz, Hesse, Susanne, Lee, Juhyon J, Suhm, Martin A
Format: Article
Language:English
Subjects:
Battery
Carbonates
Chirality
Dimers
Ethylene
Handedness
Propylene
Solvents
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Summary:Dimers of ethylene carbonate and propylene carbonate are created in supersonic jet expansions and characterized by FTIR spectroscopy. Fermi resonances are switched on and off by dimerization. There is a unique centrosymmetric dimer of ethylene carbonate in a pronounced case of complementary chirality synchronization, contributing to its energy storage capacity at melting. Two chiral propylene carbonate molecules combine in more intricate ways. If they have the same handedness, one of them is forced into an axial conformation and the binding partner stays in the more stable equatorial structure. If they have opposite handedness, centrosymmetric dimers of either axial or equatorial conformations are formed. This suggests the usefulness of chirality control in elucidating ionic transport mechanisms in battery solvents and asymmetric catalysis in such solvents.
ISSN:1463-9076
1463-9084
DOI:10.1039/c1cp21460h