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Adsorption and Aggregation of meso-Tetrakis(4-carboxyphenyl)porphyrinato Zinc(II) at the Polarized Water|1,2-Dichloroethane Interface
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SYSNO ASEP 0181581 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Adsorption and Aggregation of meso-Tetrakis(4-carboxyphenyl)porphyrinato Zinc(II) at the Polarized Water|1,2-Dichloroethane Interface Author(s) Nagatani, H. (CH)
Samec, Zdeněk (UFCH-W) RID, ORCID
Brevet, P. F. (FR)
Fermín, D. J. (CH)
Girault, H. H. (CH)Source Title Journal of Physical Chemistry. B - ISSN 1089-5647
Roč. 107, č. 3 (2003), s. 786-790Number of pages 5 s. Language eng - English Country US - United States Keywords adsorption ; polarized water ; 1,2-dichloroethane interface Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA203/01/0946 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z4040901 - UFCH-W Annotation The specific adsorption of the water-soluble meso-tetrakis(4-carboxyphenyl)porphyrinato zinc(II) (ZnTPPC4-) was studied at the polarizable water|1,2-dichloroethane (DCE) interface by surface second harmonic (SH) generation and quasi-elastic laser scattering (QELS). The intense SH responses were analyzed as a function of the ZnTPPC4- concentration and of the Galvani potential difference. It was confirmed that the coverage of ZnTPPC increases as the Galvani potential difference approaches the formal ion transfer potential. In this potential range, the high interfacial concentration induces the formation of J-aggregates at the interface. The aggregation phenomena manifest itself by a red-shift of the SH response resonant to the Soret band and an overall increase in the SH intensity. At potentials more positive than the formal transfer potential, the SH spectrum exhibits a maximum at the same wavelength of absorption of ZnTPPC in solution, suggesting a low extent. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2004
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