Solution studies on tetra(p-carboxyphenyl)porphyrin iron(II) using Mössbauer spectroscopy and electronic absorption spectroscopies
| Autor: | Jack Silver, Andrew Houlton, Husam Abu-Soud |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
chemistry.chemical_classification
Absorption spectroscopy biology Inorganic chemistry Substituent Quadrupole splitting biology.organism_classification Porphyrin Inorganic Chemistry Crystallography chemistry.chemical_compound chemistry Mössbauer spectroscopy Materials Chemistry Tetra Physical and Theoretical Chemistry Absorption (chemistry) Inorganic compound |
| Zdroj: | Inorganica Chimica Acta. 151:77-83 |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/s0020-1693(00)83487-8 |
| Popis: | Mossbauer (78 K) and electronic absorption spectra (298 K) of tetra( p -carboxyphenyl)porphyrin iron(II) solutions are reported and discussed. Evidence for only two iron(II) complexes, the first an intermediate spin and the second a high spin complex, is found in the Mossbauer spectra. Electronic absorption spectra show a low spin complex is present at very low concentrations. It is observed from these results that the carboxy groups on the phenyl rings of this porphyrin greatly influence the chemistry. From the difference in the quadrupole splitting for the intermediate spin complex compared to that found in the tetra( p -sulphophenyl)porphyrin iron(II) system, the substituent on the phenyl ring clearly changes the electron density on the pyrrole nitrogen atoms. |
| Databáze: | OpenAIRE |
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