Reversible Photoisomerization of Spiropyran on the Surfaces of Au25 Nanoclusters

T. Udayabhaskararao, Pintu K. Kundu, Johannes Ahrens, Rafal Klajn

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Au25 nanoclusters functionalized with a spiropyran molecular switch are synthesized via a ligand-exchange reaction at low temperature. The resulting nanoclusters are characterized by optical and NMR spectroscopies as well as by mass spectrometry. Spiropyran bound to nanoclusters isomerizes in a reversible fashion when exposed to UV and visible light, and its properties are similar to those of free spiropyran molecules in solution. The reversible photoisomerization entails the modulation of fluorescence as well as the light-controlled self-assembly of nanoclusters.

Original languageEnglish
Pages (from-to)1805-1809
Number of pages5
Publication statusPublished - Jun 17 2016


  • molecular switches
  • nanoclusters
  • photochromism
  • self-assembly
  • spiropyran

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

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