Original Paper

Polymer Bulletin

, Volume 68, Issue 8, pp 2131-2144

First online:

Star-branched cationic light-emitting dot with silsesquioxane core, synthesis, and light scattering studies

  • Yang XiaoAffiliated withInstitute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR)
  • , Khine Y. MyaAffiliated withInstitute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR)
  • , Beng H. TanAffiliated withInstitute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR)
  • , Chao B. HeAffiliated withInstitute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR)Department of Materials Science and Engineering, National University of Singapore Email author 

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Abstract

Novel star-like hydrophobic (M) and hydrophilic (W) hybrid light-emitting dots were synthesized by grafting conjugated arms at eight vertexes of polyhedral oligomeric silsesquioxane (POSS) cage. The water-soluble cationic polymer W contains POSS as a core and two layers shell—an inner layer shell consists of the conjugated organic chain and a long chain of hydrophilic polymer as outer layer shell for solubilization in water. The 3D structure renders non-aggregation properties of W in solution as the wavelength for the absorption and luminescence spectra remains unchanged over different concentrations. The effects of ionic strength and pH on the properties of cationic polymer W were studied using UV, dynamic- and static-light scattering (DLS and SLS).

Keywords

Silsesquioxane Light-emitting Dot Cationic Water soluble Light scattering