Fluorescent diazapyrenium films and their response to dopamine

Mabel A. Cejas, Françisco M. Raymo

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


The preparation of 2,7-diazapyrenium films on glass, quartz and silica was described. The transmission absorption spectra confirmed the presence of 2,7-diazapyrenium chromophores, but indicate sub-monolayer surface coverages. The amount of immobilized 2,7-diazapyrenium dications increases significantly when the polysiloxane formation steps of both procedures are performed either on the surface of silica nanoparticles or in the presence of Si(OEt) 4 on glass slides. The emission intensity of the 2,7-diazapyrenium dications decreases upon association of the surface-confined fluorophores with dopamine.

Original languageEnglish (US)
Pages (from-to)5795-5802
Number of pages8
Issue number13
StatePublished - Jun 21 2005

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry


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