Solid State and Solution Self-Assembly of Helical Polypeptides Tethered to Polyhedral Oligomeric Silsesquioxanes
Macromolecules2009Vol. 42(5), pp. 1619–1626
Citations Over TimeTop 10% of 2009 papers
Abstract
New macromolecular self-assembling building blocks, polyhedral oligo- silsesquioxane (POSS)-helical polypeptide copolymers, have been synthesized through the ring-opening polymerization (ROP) of γ-benzyl-l-glutamate N-carboxyanhydride (γ-Bn-Glu NCA) using aminopropyl isobutyl-POSS as a macroinitiator. The incorporation of POSS units at the chain ends of PBLG moieties has two important effects: allowing intramolecular hydrogen bonding between the POSS and PBLG units to enhance the latter’s α-helical conformations in the solid state and preventing the aggregation of nanoribbons through the POSS blocks’ protrusion from the ribbons to allow the formation of clear gels in solution.
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