Photoluminescence of a covalent assembled porphyrin-based monolayer: Optical behavior in the presence of O2

Antonino Gulino, Salvatore Giuffrida, Placido Mineo, Michele Purrazzo, Emilio Scamporrino, Giorgio Ventimiglia, Milko E. Van Der Boom, Ignazio Fragalà

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Abstract

The optical O2 recognition capability of a covalently assembled monolayer (CAM) of 5,10,15-tri-{p-dodecanoxyphenyl}-20-(p-hydroxyphenyl) porphyrin on silica-based substrates was studied at room temperature by both UV-vis and photoluminescence (PL) measurements. The optical properties of this robust monolayer setup appear to be highly sensitive to the O2 concentration in N2. Both UV-vis and PL measurements were used to study the porphyrin-oxygen interactions. The monolayer-based sensor exhibits a short response time and can be restored within seconds. The oxygen-induced luminescence quenching of the monolayer involves both ground and excited states. The proposed mechanism responsible for the luminescence quenching involves different kinds of interactions between the monolayer and O2.

Original languageEnglish
Pages (from-to)16781-16786
Number of pages6
JournalJournal of Physical Chemistry B
Volume110
Issue number33
DOIs
Publication statusPublished - Aug 24 2006

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Gulino, A., Giuffrida, S., Mineo, P., Purrazzo, M., Scamporrino, E., Ventimiglia, G., Van Der Boom, M. E., & Fragalà, I. (2006). Photoluminescence of a covalent assembled porphyrin-based monolayer: Optical behavior in the presence of O2. Journal of Physical Chemistry B, 110(33), 16781-16786. https://doi.org/10.1021/jp062967g