| Adsorption Behavior of a Water-soluble Porphyrin at the Glass-water Interface as Studied by Synchronous Total Internal Reflection Fluorescence Spectroscopy |
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| 作者姓名： | MinNaYAO YaoQunLI |
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| 作者单位： | TheKeyLaboratoryofAnalyticalSciencesofMOEandDepartmentofChemistry,XiamenUniversity,Xiamen361005 |
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| 摘 要： | Total imernal reflection fluorescence spectroscopy (TIRF) and synchronous scanning technique were combined to study the adsorption behavior of the meso-tetrakis (4-sulfonatophenyl)porphyrin (TPPS) at the glass-water interface without any surfactant. The pH dependence of synchronous fluorescence signal at the interface was analyzed. Both unprotonated (TPPS^4-) and diprotonated (H2TPPS^2-) forms of TPPS were observed at the interface. But the interface favored the adsorption of. The apparent estimated pKa2 value shifted from 5.00 in the bulk solution to 2.7 at the interface. STIRF provides a good technique to study multi-component systems at the interface.
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| 关 键 词： | 吸附作用 水溶卟啉 同步内在全反射荧光光谱学 界面 |
Adsorption Behavior of a Water-soluble Porphyrin at the Glass-water Interface as Studied by Synchronous Total Internal Reflection Fluorescence Spectroscopy |
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| MinNaYAO YaoQunLI.Adsorption Behavior of a Water-soluble Porphyrin at the Glass-water Interface as Studied by Synchronous Total Internal Reflection Fluorescence Spectroscopy[J].Chinese Chemical Letters,2004,15(1):109-111. |
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| Authors: | Min Na YAO Yao Qun LI The Key Laboratory of Analytical Sciences of MOE and |
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| Institution: | Min Na YAO,Yao Qun LI* The Key Laboratory of Analytical Sciences of MOE and Department of Chemistry,Xiamen University,Xiamen 361005 |
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| Abstract: | Total internal reflection fluorescence spectroscopy (TIRF) and synchronous scanning technique were combined to study the adsorption behavior of the meso-tetrakis (4-sulfonatophenyl) porphyrin (TPPS) at the glass-water interface without any surfactant. The pH dependence of synchronous fluorescence signal at the interface was analyzed. Both unprotonated (TPPS4-) and diprotonated (H2TPPS2-) forms of TPPS were observed at the interface. But the interface favored the adsorption of. The apparent estimated pKa2 value shifted from 5.00 in the bulk solution to 2.7 at the interface. STIRF provides a good technique to study multi-component systems at the interface. |
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| Keywords: | Total internal reflection fluorescence synchronous fluorescence water- soluble porphyrin pH dependence glass-water interface |
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