Journal
MACROMOLECULES
Volume 44, Issue 8, Pages 2589-2596Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ma200268u
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Funding
- NSF [DMR-0906898, DMR-0821313, CHE-1012636]
- Lubrizol Corp.
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1012636] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0821313] Funding Source: National Science Foundation
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This paper reports a facile, modular, and efficient approach to the synthesis of shape amphiphiles with a hydrophobic polymer chain as the tail and a polar, compact, functional polyhedral oligomeric silsequioxane (POSS) nanoparticle as the headgroup. A poly(L-lactide) (PLLA) chain was grown from monohydroxyl-functionalized heptavinyl POSS (VPOSS- OH) with controlled molecular weight and narrow polydispersity by stannous octoate-mediated ring-opening polymerization of L-lactide. To impart tunable polarity and functionality to the headgroup,;various functional groups, such as carboxylic acids, hydroxyl groups, and sugars, were attached to the POSS cage in high efficiency by thiol-ene click chemistry, which provides a straightforward and effective approach to synthesize, shape amphiphiles with diverse head surface chemistry. The polymers have been fully characterized by H-1 NMR, C-13 NMR, FT-IR spectroscopy, MALDI-TOF mass spectrometry, and size exclusion chromatography. These functional POSS can serve as versatile nanobuilding blocks in the bottom-up construction of nanoscale structures and assemblies that may exhibit rich self-assembling behavior and potentially useful physical properties.
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