Chemistry Reference
In-Depth Information
10
8
6
4
2
0
-2
-4
-6
-8
0
5
10
15
20
25
t/min
Figure 5.4
Electropherogram for the enantiomeric separation of a mixture of three
NDA-
d/
l-amino acids (i.e. NDA-
d/l-
β-Phen, NDA-
d/l
-Trp and NDA-
d/l
-Kyn).
Reproduced with permission from S.L. Zhao, H.S. Wang, Y.M. Pan, M. He, Z.C.
Zhao,
Journal of Chromatography A
, 2007,
1145
, 246. ©2007, Elsevier [49]
The advantages of rosin-based surfactants as a chiral surfactant for the separation
of amino acids are that the tricyclic hydrophenanthrene structure contains many
chiral centres, the synthetic procedure for the surfactants is relatively simple and the
starting material is a natural product which easily available.
5.4.6 Material Synthesis
The ability of surfactants to self-assemble into well-defined structures has been taken
advantage of for the design and synthesis of inorganic materials with nanosized
dimensions [72]. This approach to nanomaterials preparation has triggered substantial
interest both in the surface chemistry and the materials chemistry community. In
the previous research, surfactants have been used as templates in the synthesis of
nanoinorganic powder materials, nanostructured materials, nanocomposite materials
and Langmuir-Blodgett films. The size, charge, and shape of the surfactant are
important structure-determining parameters in the synthesis of the materials.
As special structure surfactants, rosin-based surfactants may be used to synthesise
inorganic materials. Han and co-workers
reported [73] that nickel hydroxide materials
were prepared by a microwave solvothermal method with a rosin-based surfactant
