Dynamic light scattering and cryogenic transmission electron microscopy investigations on metallo-supramolecular aqueous micelles: evidence of secondary aggregation
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Regev, Oren; Gohy, Jean-Francois; Lohmeijer, Bas G. G.; Varshney, Sunil K.; Hubert, Dominique H. W.; Schubert, Ulrich S.
- Abstract:
- Metallo-supramolecular
diblock copolymers consisting of a
polystyrene (PS) block connected to
a poly(ethylene oxide) (PEO) block
by a bis(terpyridine)ruthenium
complex (PS20-[Ru]-PEOy) were
used to prepare aqueous micelles.
The length of the PS block was kept
constant, while two PEOs of different
molecular weight were used. The
resulting hydrated micelles and
aggregates were characterized by a
combination of cryogenic transmission
electron microscopy (cryo-
TEM) and dynamic light scattering
measurements. The results were
compared to those obtained for a
covalent counterpart (PS22-b-
PEO70). Cryogenic transmission
electron microscopy allowed visualization
of the PS core of the micelles.
Moreover, the aggregates result
from clustering of individual micelles.
- Year:
- 2004
- Type of Publication:
- Article
- Keywords:
- Metallo supramolecular chemistry; Block copolymers; Micelles; Cryogenic transmission electron microscopy; Dynamic light scattering
- Journal:
- Colloid and Polymer Science
- Volume:
- 282
- Pages:
- 407 - 411