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solubility was endowed by its complexation with PYR driven
by charge transfer interaction. An interesting finding is that the
formation of bolaform supra-amphiphile results in a transformation
from tubes-like aggregates to vesicles.
Figure 6.4
Bolaform supra-amphiphile based on charge transfer
interaction. Reproduced with permission of Ref. [15].
Copyright 2008, Wiley-VCH Verlag GmbH & Co. KGaA.
With elaborate tuning the structures of the building blocks,
X-shape or H-shape supra-amphiphiles, are successfully assembled,
which can be used to create tunable supramolecular nanostructures.
For example, we have fabricated an X-shape supra-amphiphile on
the basis of directional-charge-transfer complexes of naphthalene
diimide and naphthalene [26]. The X-shape supra-amphiphiles
were prepared by mixing 1,1
-(1,3,6,8-tetraoxobenzo[lmn]
[3,8]phenanthroline-2,7(1H,3H,6H,8H)-diyl)bis(decane-10,1-diyl))
dipyridinium
-(10,10
-(naphthalene-
1,5- diylbis(oxy))bis(decane-10,1-diyl))dipyridinium bromide
(BNAPH) in aqueous solution, resulting in the formation of one-
dimensional nanorods. However, the complexation of BNDI with
1,1
bromide
(BNDI)
and
1,1
-(10,10
-(naphthalene-2,6-diylbis(oxy))bis(decane-10,1-diyl))
dipyridinium bromide (IBNAPH) leads to the formation of H-shape
supra-amphiphile, which can self-assemble into two-dimensional
nanosheets. It means that a small change in the structure of the
supra-amphiphile may cause a big change in the structure of
self-assemblies. It represents a good example of supramolecular
-(10,10
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