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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 ASEP0181581
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JOstatní články
    TitleAdsorption 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 TitleJournal of Physical Chemistry. B - ISSN 1089-5647
    Roč. 107, č. 3 (2003), s. 786-790
    Number of pages5 s.
    Languageeng - English
    CountryUS - United States
    Keywordsadsorption ; polarized water ; 1,2-dichloroethane interface
    Subject RIVCF - Physical ; Theoretical Chemistry
    R&D ProjectsGA203/01/0946 GA ČR - Czech Science Foundation (CSF)
    CEZAV0Z4040901 - UFCH-W
    AnnotationThe 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.
    WorkplaceJ. Heyrovsky Institute of Physical Chemistry
    ContactMichaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
    Year of Publishing2004

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