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Updated: May 23, 2026
Microwave-assisted Intramolecular Dehydrogenative Diels-Alder Reactions for the Synthesis of Functionalized Naphthalenes/Solvatochromic Dyes
Published on: April 1, 2013
Highly sensitive detection of naphthalene in solvent vapor using a functionalized PBG refractive index sensor
Maiko Girschikofsky1, Manuel Rosenberger, Stefan Belle
1University of Applied Sciences Aschaffenburg, Würzburger Strasse 45, D-63743 Aschaffenburg, Germany. maiko.girschikofsky@h-ab.de
Abstract:
We report an optical refractive index sensor system based on a planar Bragg grating which is functionalized by substituted γ-cyclodextrin to determine low concentrations of naphthalene in solvent vapor. The sensor system exhibits a quasi-instantaneous shift of the Bragg wavelength and is therefore capable for online detection. The overall shift of the Bragg wavelength reveals a linear relationship to the analyte concentration with a gradient of 12.5 ± 1.5 pm/ppm. Due to the spectral resolution and repeatability of the interrogation system, this corresponds to acquisition steps of 80 ppb. Taking into account the experimentally detected signal noise a minimum detection limit of 0.48 ± 0.05 ppm is deduced.
