New organic ionic plastic crystals based on pyrrolidinium dication for a solid-phase electrolyte
- Authors
- Shin, JC[Shin, Jong Chan]; Kim, TY[Kim, Tae Young]; Kim, HJ[Kim, Hwi Jung]; Choi, UH[Choi, U. Hyeok]; Park, HS[Park, Ho Seok]; Lee, M[Lee, Minjae]
- Issue Date
- Apr-2023
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- bis-pyrrolidnium; dicationic salt; organic ionic plastic crystals; solid electrolyte; solid-solid phase transition; solid-state morphology
- Citation
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.44, no.4, pp.310 - 321
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY
- Volume
- 44
- Number
- 4
- Start Page
- 310
- End Page
- 321
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/102439
- DOI
- 10.1002/bkcs.12668
- ISSN
- 0253-2964
- Abstract
- A series of 1,4-bis(N-alkylpyrrolidinium)butane salts combined with Br-, I-, PF6-, and Tf2N- anions were newly designed and synthesized. In nonpolar CDCl3 solution, the axial and equatorial proton peaks of the bis-pyrrolidinium cation ring are distinguished in H-1 NMR. Also, the strengths of ion paring could be estimated from the H-1 NMR chemical shift changes of the bridge and pyrrolidinium proton peaks. 1,4-Bis(N-hepthylpyrrolidinium)butane I- is an organic ionic plastic crystal showing the lowest fusion entropy value (delta S-f = 3.4 J Kmiddotmol(-1)). Softer crystalline morphologies were found by polarized optical microscope images at plastic crystal phase of each sample and the results were corresponding to differential scanning calorimetry results. 1,4-Bis(N-ethylpyrrolidinium)butane Tf2N- showed the softest crystal phase. Ionic conductivity changes and electrochemical stabilities of the bis-pyrrolidinium PF6- and Tf2N- salts were also measured, and they were stable up to 4.3 V (vs. Li/Li+) and expected to be applied as an electrolyte component.
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Collections - Engineering > Chemical Engineering > 1. Journal Articles
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