NDLI: Total Internal Reflection Fluorescence Spectroscopy for Investigating the Adsorption of a Porphyrin at the Glass/Water Interface in the Presence of a Cationic Surfactant Below the Critical Micelle Concentration

Content Provider	Springer Nature Link
Author	Tang, Yao Ji Chen, Ying Yao, Min Na Zou, Zhe Xiang Han, Guo Bin Li, Yao Qun
Copyright Year	2007
Abstract	Total internal reflection fluorescence (TIRF) spectroscopy was used to investigate the adsorption behavior of meso-tetrakis(p-sulfonatophenyl)porphyrin (TPPS) at the glass/water interface in the presence of a cationic surfactant (cetyltrimethylammonium bromide, CTAB) far below the critical micelle concentration. The adsorption model of TPPS at the glass/water interface in the presence of low concentration of CTAB was proposed, which was different from the adsorption of TPPS in the presence of micelles of CTAB at the glass/water interface. TPPS and CTAB did not form stable complex at the interface in dilute system. The interfacial species of TPPS were analyzed by comparing the spectra of TPPS at the glass/water interface and in the aqueous phase. The influences of the TPPS concentration, the CTAB concentration, and the pH values on the interfacial fluorescence spectra and intensities were studied. It was demonstrated that electrostatic interaction and hydrophobicity performed an important role on the adsorption of TPPS in the presence of CTAB. The different effects of TPPS concentration on the adsorption behaviour of TPPS at different pH were observed for the first time. It was found that the adsorption isotherms of TPPS at glass/water interface could fit Freundlich equation at pH 7.1.
Starting Page	261
Ending Page	267
Page Count	7
File Format	PDF
ISSN	10530509
Journal	Journal of Fluorescence
Volume Number	18
Issue Number	2
e-ISSN	15734994
Language	English
Publisher	Springer US
Publisher Date	2007-09-25
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Total internal reflection fluorescence Porphyrin Surfactants Interface Adsorption Analytical Chemistry Biochemistry Biotechnology Biophysics/Biomedical Physics Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Sociology and Political Science Spectroscopy Law Biochemistry Clinical Biochemistry Clinical Psychology

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