Biomedical Engineering Reference
In-Depth Information
applications of ILs, which has been a longstanding challenge in
the field. Using 1-butyl-3-methylimidazolium bromide (BMIMBr),
1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF
) and
1-hexyl-3-methylimidazolium bromide (HMIMBr) as examples, it
was demonstrated that following traditional synthesizing method
except that the water was added as solvent, colorless ILs could
be facilely obtained (Fig. 4.24) [72]. In this case, neither critical
pretreatment of starting materials and precautions during the
reaction nor time-consuming and costly post-decolor-purification
was needed. It was believed that in the presence of water, the
reactants were biphasic; thus local hot spots due to the higher
concentration could be effectively eliminated, which directly
produce colorless ILs. It will not only pave the way for economical
synthesis of a broad variety of colorless ILs for spectroscopy so as
to eliminate the uncertainties and limits but also motivate
theoretical and experimental studies to deepen fundamental
understanding
4
of
the
source(s)
of
color
in
ILs
and
enrich
the
applications
of
ILs
in
spectroscopic
analytic
researches
and applications.
4.8 CONCLUSIONS
Owing to high ionic conductivity and wide electrochemical
window, ILs have the intrinsic advantages for potential
applications in electroanalytical chemistry. IL functional materials
extend their scope of applications in traditional electroanalytical
chemistry merely as green solvents and enable them to be modified
on the electrode more conveniently and effectively. Moreover, many
other advanced functional compounds could be integrated into
multifunctional materials in which ILs act as the backbone. The
unique properties of ILs have been well transferred into these ILs
materials, and due to synergistic effect, some new electrocatalytic
activities are observed. These features enable ILs materials to be
promising materials for electroanalytical chemistry. Besides, the
concept illustrated here can also be applied to ILs applications in
other fields.
 
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