Local environments of coumarin dyes within mesostructured silica-surfactant nanocomposites

The Journal of Physical Chemistry. B
Akira YamaguchiNorio Teramae

Abstract

The local environments surrounding dye molecules were studied with use of coumarin dyes in a mesostructured silica-surfactant nanocomposite, which was formed in a porous alumina membrane by a surfactant-templated method and has an average pore diameter of 3.4 nm. Coumarin dyes, such as coumarin 480 (C480), coumarin 343 (C343), and propylamide coumarin 343 (PAC343), were extracted into the silica-surfactant nanocomposite and time-resolved fluorescence spectra of these dyes were examined. C480 and C343 show slow dynamic Stokes shifts and the decay curve can be fitted by a biexponential function. The decay-time constants obtained from the fitting are almost identical for C480 and C343: 0.87 and 7.5 ns for C480, and 0.86 and 7.6 ns for C343. In contrast to these two coumarin dyes, short decay-time constants (0.50 and 4.8 ns) were obtained for PAC343 in the silica-surfactant nanocomposite. These results indicate that the local environments of C480 and C343 are almost identical but different from that of PAC343. By considering the origin of the dynamic Stokes shift and the mesostructure of the silica-surfactant nanocomposite, the location and microenvironment of coumarin dyes within the silica-surfactant nanocomposite are discussed.

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Citations

Mar 10, 2007·Chemical Communications : Chem Comm·Tomohisa YamashitaYukio Saito
Feb 12, 2015·The Journal of Chemical Physics·M Dolores Elola, Javier Rodriguez
Dec 13, 2006·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Tomohisa YamashitaYukio Saito
Dec 13, 2006·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Akira YamaguchiNorio Teramae
Jan 12, 2008·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Akira Yamaguchi, Norio Teramae
Apr 13, 2011·Advanced Materials·Barbara PlatschekThomas Bein
Mar 16, 2012·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Jana DonovalováPavol Hrdlovič
Dec 9, 2010·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Pavol HrdlovicAnton Gaplovsky
Apr 28, 2009·Angewandte Chemie·Shinji InagakiTadashi Okada
Mar 17, 2019·International Journal of Molecular Sciences·Maria Rosaria di NunzioAbderrazzak Douhal
Jun 6, 2009·The Journal of Physical Chemistry. B·Mariana Esquivelzeta-RabellGabriel Cuevas
Oct 24, 2008·The Journal of Physical Chemistry. a·Toshio KamijoTakuji Ikeda
May 8, 2014·The Journal of Physical Chemistry Letters·Min Xue, Jeffrey I Zink
Jan 19, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Norihiro MizoshitaShinji Inagaki
Oct 9, 2014·The Journal of Physical Chemistry. B·Jacob Allen Harvey, Ward H Thompson
Dec 8, 2006·The Journal of Physical Chemistry. a·Subhadip GhoshKankan Bhattacharyya
Jan 30, 2008·The Journal of Physical Chemistry. B·Akira YamaguchiNorio Teramae

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