Fluorescent diazapyrenium films and their response to dopamine

Mabel A. Cejas; Françisco M. Raymo

doi:10.1021/la0502793

Fluorescent diazapyrenium films and their response to dopamine

Mabel A. Cejas, Françisco M. Raymo

Chemistry

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	5795-5802
Number of pages	8
Journal	Langmuir
Volume	21
Issue number	13
DOIs	https://doi.org/10.1021/la0502793
State	Published - Jun 21 2005

ASJC Scopus subject areas

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

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AU - Raymo, Françisco M.

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AB - 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.

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Fluorescent diazapyrenium films and their response to dopamine

Abstract

ASJC Scopus subject areas

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