Ion-association aggregation of an anionic porphyrin at the liquid/liquid interface studied by second harmonic generation spectroscopy

Langmuir : the ACS Journal of Surfaces and Colloids
Kazuhiko FujiwaraHitoshi Watarai

Abstract

Interfacial ion-association adsorption and aggregation of a water-soluble porphyrin, tetrakis(4-sulfonatephenyl)porphyrin (TPPS) diacid, which was promoted by a cationic cetyltrimethylammonium ion (CTA(+)), was studied by second harmonic generation (SHG) spectroscopy. Comparing the interfacial SH spectrum with the transmission absorption spectrum of TPPS in the aqueous solution elucidated the aggregation behavior of TPPS at the heptane/water interface. The time-dependent SHG spectra for TPPS aggregation and the interfacial tension lowering in the presence of CTA(+) were discussed on the basis of an electrostatic adsorption model. Then, it was suggested that TPPS diacid was highly concentrated by the ion-association with CTA(+) at the interface, which was the intermediate state before the final aggregated state.

References

Jan 30, 2003·Journal of the American Chemical Society·William H Steel, Robert A Walker
Feb 27, 2003·Journal of the American Chemical Society·Shinsuke Okada, Hiroshi Segawa
May 15, 2004·Science·J LelieveldP Winkler
Nov 30, 2004·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Sayaka WadaHitoshi Watarai

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Citations

Jun 11, 2009·Analytical and Bioanalytical Chemistry·Jilska M Perera, Geoffrey W Stevens
Nov 24, 2011·Journal of the American Chemical Society·Astrid J OlayaHubert H Girault
Jul 14, 2006·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Takeyoshi GotoHitoshi Watarai
Feb 13, 2009·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Kazuhiko FujiwaraNobuaki Ogawa
Jan 8, 2016·Physical Chemistry Chemical Physics : PCCP·Giuseppe LicariEric Vauthey
May 20, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Hirohisa NagataniHisanori Imura
Aug 12, 2015·The Journal of Physical Chemistry Letters·Kai LvMinghua Liu
Mar 21, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Giuseppe LicariEric Vauthey
Apr 11, 2017·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Hiromi TakiguchiKin-Ichi Tsunoda
Dec 5, 2008·The Journal of Physical Chemistry. B·Kohei HosomizuHiroshi Imahori
Jun 6, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Sho YamamotoHisanori Imura

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