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Visible Light-Controlled Inversion of Pickering Emulsions Stabilized by Functional Silica Microspheres.

Yongkui ChenZhiyong LiHuiyong WangYuanchao PeiYunlei ShiHuiyong Wang
Published in: Langmuir : the ACS journal of surfaces and colloids (2018)
A new class of donor-acceptor Stenhouse adduct (DASA)-functionalized silica microspheres (SMs) is designed and described to formulate Pickering emulsions with inversion property and large polarity change upon visible light irradiation. By tuning the hydrophilicity of the functional SM particles with visible light, these Pickering emulsions can easily perform inversion from water-in-oil to oil-in-water. The inversion performance of the emulsions is ascribed to DASA photoisomerization from an extended, hydrophobic, and intensely purple-colored triene to a compact, zwitterionic, and colorless cyclopentenone upon irradiation with visible light. This unique inversion behavior has been applied to control encapsulation and the release of fluorescein sodium salt.
Keyphrases
  • visible light
  • contrast enhanced
  • magnetic resonance imaging
  • molecularly imprinted
  • fatty acid
  • magnetic resonance
  • computed tomography
  • radiation therapy
  • ionic liquid
  • solid phase extraction