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Synthesis of Oxygen‐Containing Spirobipyrrolidinium Salts for High Conductivity Room Temperature Ionic Liquids
Author(s) -
Higashiya Seiichiro,
Devarajan Thamarai Selvi,
RaneFondacaro Manisha V.,
Dangler Christopher,
Snyder Jeremy,
Haldar Pradeep
Publication year - 2009
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200900045
Subject(s) - chemistry , ionic liquid , melting point , electrochemistry , alkyl , counterion , viscosity , ionic conductivity , oxygen atom , oxygen , inorganic chemistry , conductivity , ionic bonding , freezing point , ion , organic chemistry , electrode , thermodynamics , catalysis , molecule , electrolyte , physics
Synthesis of ionic liquids (IL) based on oxygen‐containing spirobipyrrolidinium salts with BF 4 , BF 3 C 2 F 5 , and NTf 2 as counterions was undertaken. Their physical and electrochemical properties were evaluated for suitability for Room Temperature Ionic Liquids (RTIL) application. Reduction in melting point occurred upon exchange of C(2) by an O‐atom of spirobipyrrolidinium, without sacrificing the electrochemical stability; while introduction of alkyl groups between the N‐ and O‐atoms led to incorporation of asymmetry, and hence reduced the melting points, and viscosity.