Reversible photoswitchable fluorescence in thin films of inorganic nanoparticle and polyoxometalate assemblies

J Am Chem Soc. 2010 Mar 10;132(9):2886-8. doi: 10.1021/ja908201x.

Abstract

A novel type of inorganic hybridized ultrathin film consisting of Preyssler-type polyoxometalates K(14)[Na(H(2)O)P(5)W(30)O(110)] (Na-POMs) and CdSe@CdS nanoparticles (NPs) was prepared on the solid substrates by a layer-by-layer assembly technique. The film exhibits reversible fluorescence switching behavior under control of irradiation with either UV light or visible light, which is ascribed to the selective occurrence of fluorescence resonance energy transfer between luminescent NPs and different states of photochromic Na-POMs.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cadmium Compounds / chemistry*
  • Fluorescence*
  • Membranes, Artificial*
  • Nanoparticles / chemistry*
  • Particle Size
  • Photochemistry
  • Polyethyleneimine / chemistry
  • Selenium Compounds / chemistry*
  • Sulfides / chemistry*
  • Surface Properties
  • Tungsten Compounds / chemistry*

Substances

  • Cadmium Compounds
  • Membranes, Artificial
  • Selenium Compounds
  • Sulfides
  • Tungsten Compounds
  • polyoxometalate I
  • cadmium sulfide
  • Polyethyleneimine
  • cadmium selenide