This invention relates to compounds useful as ionic liquids that are based on an N-substituted pyrrolidinone and incorporate a pendant ammonium cation that is spaced from the pyrrolidone ring by a variable length linker, which compounds may be represented by the structure of the following Formula I:
wherein:
(a) Z is —(CH
2
)
n
—, wherein n is an integer from 2 to 12;
(b) R
2
, R
3
and R
4
are each independently H or a C
1
to C
6
straight-chain or branched alkyl group; and
(c) A
−
is levulinate, —[CF
3
—O—CFHCF
2
SO
3
]—, [CF
3
CF
2
OCFHCF
2
SO
3
]—, or [CF
3
CF
2
CF
2
OCFHCF
2
SO
3
]—.
这项发明涉及一种作为
离子液体有用的化合物,该化合物基于N-取代
吡咯烷酮,并包含一个与
吡咯烷酮环相距一定长度的挂链
铵阳离子,该化合物可由以下结构的公式I表示:其中:(a) Z为—(
CH2)n—,其中n为2至12的整数;(b) R2、R3和R4分别独立地为H或C1至C6的直链或支链烷基;以及(c) A-为左旋檸檬酸盐、—[CF3—O—CFH
CF2SO3]—、[CF3
CF2OCFH
CF2SO3]—或[CF3
CF2CF2OCFH
CF2SO3]—。