Xin-jun Zhang, Fei Yuan, Yong-liang Wang, et al. A CONFORMATION STUDY OF POLYELECTROLYTE-DENDRITIC SURFACTANT COMPLEXES IN DILUTE SOLUTIONS[J]. 2010, 28(3): 395-404.
DOI:
Xin-jun Zhang, Fei Yuan, Yong-liang Wang, et al. A CONFORMATION STUDY OF POLYELECTROLYTE-DENDRITIC SURFACTANT COMPLEXES IN DILUTE SOLUTIONS[J]. 2010, 28(3): 395-404.DOI: 10.1007/s10118-010-9037-6.
A CONFORMATION STUDY OF POLYELECTROLYTE-DENDRITIC SURFACTANT COMPLEXES IN DILUTE SOLUTIONS
Three dendronized polymers from generation one to generation three have been prepared by complexing negatively charged Frchet-type dendrons with a polyanion
poly(diallydimethylammonium chloride) (PDADMAC). The grafting degree has been confirmed mainly by elemental analysis. In dilute solutions of tetrahydrofuran
static light scattering studies indicate that the first generation complex has a coil-like conformation
even more flexible than PDADMAC. The second and third generation complexes exhibit polyelectrolyte behavior. Dynamic light scattering experiments indicate that all the three complexes have almost the same hydrodynamic radius
indicating that they might own similar coil conformation. Atomic force microscopy shows the existence of disordered globules formed by one or a couple of complex coils. All these observations can be explained by the flowerlike coil conformation
which is formed by the intra-molecular association. This is totally different from the stretched chain conformation formed by covalently connected dendronized polymers. This result also explains why some ordered supramolecular structures
found in condensed state of the similar complexes
are not as perfect as those of conventional dendronized polymers.
Abstract
Three dendronized polymers from generation one to generation three have been prepared by complexing negatively charged Frchet-type dendrons with a polyanion
poly(diallydimethylammonium chloride) (PDADMAC). The grafting degree has been confirmed mainly by elemental analysis. In dilute solutions of tetrahydrofuran
static light scattering studies indicate that the first generation complex has a coil-like conformation
even more flexible than PDADMAC. The second and third generation complexes exhibit polyelectrolyte behavior. Dynamic light scattering experiments indicate that all the three complexes have almost the same hydrodynamic radius
indicating that they might own similar coil conformation. Atomic force microscopy shows the existence of disordered globules formed by one or a couple of complex coils. All these observations can be explained by the flowerlike coil conformation
which is formed by the intra-molecular association. This is totally different from the stretched chain conformation formed by covalently connected dendronized polymers. This result also explains why some ordered supramolecular structures
found in condensed state of the similar complexes
are not as perfect as those of conventional dendronized polymers.
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