Total internal reflection second-harmonic generation spectrometer system optimized for the liquid/liquid interface

Journal Article · Tue Feb 01 04:00:00 EST 2005 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1854214· OSTI ID:20644081

Fujiwara, Kazuhiko; Monjushiro, Hideaki; Watarai, Hitoshi ^[1]

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1. Department of Chemistry, Graduate School of Science, Osaka University, Toyanaka, Osaka 560-0043 (Japan)

An apparatus for optical second-harmonic generation (SHG) spectroscopy at the liquid/liquid interface has been constructed. The fundamental laser beam of 780-920 nm was irradiated to the interface under the total internal reflection condition, and the interfacial second-harmonic spectrum was obtained during 390-460 nm. An automatically wavelength-tuned Ti:Sapphire laser was employed in this study, and it was simultaneously controlled with other peripheral instruments, such as monochromator. The acquisition time per spectrum with 2 nm interval was less than 30 min. The measurement of SHG spectrum of water-soluble porphyrin adsorbed at the heptane/water interface was demonstrated. The solvatochromic shift of the SHG maximum of the adsorbed porphyrin was ascribed to the less polar environment around the porphyrin molecule at the interface in comparison with the aqueous phase.

• OSTI ID: 20644081
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 2 Vol. 76; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADSORPTION
HARMONIC GENERATION
HEPTANE
INTERFACES
LASERS
PORPHYRINS
REFLECTION
SAPPHIRE
SPECTRA
SPECTROSCOPY
ULTRAVIOLET SPECTROMETERS
WAVELENGTHS