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Keywords:

  • azo compounds;
  • mesoporous materials;
  • molecular mechanics;
  • photochromism
Thumbnail image of graphical abstract

Kicking out cholesterol: The release of guest molecules (cholesterol) included in the pores of mesoporous silica is promoted by simultaneous irradiation with UV and visible light. The reversible cistrans photoisomerization of azobenzene substituents on the pore surface causes a stirring action, which accelerates the diffusion of the guest from the pores (see picture), thus providing an intelligent controlled-release method.