TY  - JOUR
AB  - pH-Tunable nanoscale morphology and self-assembly mechanism of a series of oligo(p-phenyleneethynylene) (OPE)-based bolaamphiphiles featuring poly(ethyleneimine) (PEI) side chains of different length and degree of hydrolysis are described. Protonation and deprotonation of the PEI chains by changing the pH alters the hydrophilic/ hydrophobic balance of the systems and, in turn, the strength of intermolecular interactions between the hydrophobic OPE moieties. Low pH values (3) lead to weak interaction between the OPEs and result in spherical nanoparticles, in which aggregation follows an isodesmic mechanism. In contrast, higher pH values (11) induce deprotonation of the polymer chains and lead to a stronger, cooperative aggregation into anisotropic nanostructures. Our results demonstrate that pH-responsive chains can be exploited as a tool to tune self-assembly mechanisms, which opens exciting possibilities to develop new stimuliresponsive materials.
AU  - Kartha, Kalathil K.
AU  - Wendler, Felix
AU  - Rudolph, Tobias
AU  - Biehl, Philip
AU  - Fernández, Gustavo
AU  - Schacher, F. H.
DA  - 2019-12-13
DO  - 10.1002/chem.201904284
KW  - Amphiphile
KW  - pi-konjugierte Systeme
KW  - Selbstmontage
KW  - Reiz stimuliert
KW  - supramolekulare Polymerisation
KW  - amphiphiles
KW  - pi-conjugated systems
KW  - selfassembly
KW  - stimuli-responsive
KW  - supramolecular polymerization
LA  - eng
N1  - Chem. Eur. J. (2020) 26, 606-610
N1  - The work was supported by the European Commission (ERC‐StG‐2016 SUPRACOP‐715923) and the DFG "Deutsche Forschungsgemeinschaft" (FP7 Ideas: European Research Council, Systems Chemistry Approach towards Semiconductive Supramolecular Copolymers with Homo- and Heterometallophilic Interactions Supracop).
PY  - 2019-12-13
TI  - pH-Responsive Side Chains as a Tool to Control Aqueous Self-Assembly Mechanisms
TT  - pH-ansprechende Seitenketten als Werkzeug zur Kontrolle von  Selbstorganisationsmechanismen in Wasser
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:6-30189399931
Y2  - 2024-11-22T00:35:31
ER  -