Spectroscopic study of a bis(imidazole) (octaethylporphyrinato)iron(III) complex

• Autorzy: Rutkowska I. , Dziliński K. , Kaczmarzyk T. , Stanek J.
• Konferencja: Electron Magnetic Resonance Forum EMR-PL (2; 16-18.05.2013; Częstochowa-Hucisko, Poland )
• Języki publikacji: EN

Abstrakty

EN

Low-spin ferric octaethylporphyrinatoiron complex with two imidazole axial ligands [Fe(III)(OEP)(Im)2]+ has been investigated by electron paramagnetic resonance (EPR) and Mössbauer spectroscopies. It was found that the ground spin state corresponds to the electron configuration (dxy)2 (dxz, dyz)3 and planes of the imidazole axial ligands have a parallel mutual orientation. Ethyl groups bonded to pyrrole rings, as peripheral substituents, effect on the ground electron spin state of the complex studied and the relative orientation of the the imidazole axial ligands in a similar way like the phenyl substituents bonded to meso-carbon atoms of the porphyrin macrocycle. The temperature dependence of the Mössbauer spectra is discussed in terms of magnetic relaxation processes.

Słowa kluczowe

EN

electron paramagnetic resonance (EPR) spectroscopy; Mössbauer spectroscopy; low-spin iron porphyrin; imidazole axial ligands

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2013
• Tom: Vol. 58, No. 3
• Strony: 419--423
• Opis fizyczny: Bibliogr. 25 poz., rys.

Twórcy

autor

Rutkowska I.

• Institute of Physics, Częstochowa University of Technology, 19 Armii Krajowej Ave., 42-200 Częstochowa, Poland, Tel.: [phone]

autor

Dziliński K.

• Institute of Physics, Częstochowa University of Technology, 19 Armii Krajowej Ave., 42-200 Częstochowa, Poland, Tel.: [phone]

autor

Kaczmarzyk T.

• Institute of Physics, Częstochowa University of Technology, 19 Armii Krajowej Ave., 42-200 Częstochowa, Poland, Tel.: [phone]

autor

Stanek J.

• Marian Smoluchowski Institute of Physics, Jagiellonian University, 4 Reymonta Str., 30-059 Kraków, Poland

Bibliografia

• 1. Bizzari AR, Iakovleva OA, Parak F (1995) Spin-lattice relaxation in Mössbauer spectra of metmyoglobin: investigation of crystals, water and water-glycerol solutions. Chem Phys 191:185–194
• 2. Blume M, Tjon J (1968) Mössbauer spectra in fluctuating enviroment. Phys Rev A 152:345–357
• 3. Debrunner PG (1989) Mössbauer spectroscopy of iron porphyrins. In: Lever ABP, Gray HB (eds) Iron porphyrins. Part III. VCH Publishers, New York, pp 140–234
• 4. Dolphin DH, Sams JR, Tsin TB (1977) Intermediate-spin (S=3/2) porphyrinato-iron(III) complexes. Inorg Chem 16:711–713
• 5. Dziedzic-Kocurek K, Okła D, Stanek J (2013) Inter- and intramolecular dynamics of iron porphyrins. Nukleonika 58;1:83–86
• 6. Galstyan AS, Zaric SD, Knapp E-W (2005) Computetional studies on imidazole heme conformations. J Biol Inorg Chem 10:343–354
• 7. Geiger DK, Lee YJ, Scheidt WR (1984) Control of spin state in (porphinato)iron(III) complexes. An axial ligand orientation effect on the spin state in bis(2-methylimidazole)( octaethylporphinato)iron(III) perchlorate. J Am Chem Soc 106:6339–6343
• 8. Goldanskii VI, Herber RH (eds) (1968) Chemical applications of Mössbauer spectroscopy. Academic Press, New York
• 9. Gutlich P, Link R, Trautwein A (eds) (1978) Mössbauer spectroscopy and transition metal chemistry. Springer, Berlin, pp 4–40
• 10. Kaczmarzyk T, Jackowski T, Dzilinski K, Sinyakov GN (2007) Asymmetry in Mössbauer spectra of Fe(III)-azaporphyrin complexes. Nukleonika 52;Suppl 1:S93–S98
• 11. Kadish KM, Smith KM, Guilard G (eds) (2000) The porphyrin handbook. Vol. 6. Applications: Past, present and future. Academic Press, San Diego
• 12. Kadish KM, Smith KM, Guilard G (eds) (2003) The porphyrin handbook. Vol. 11: Bioinorganic and bioorganic chemistry. Academic Press, Amsterdam
• 13. Kadish KM, Smith KM, Guilard R (2010) Electronic and magnetic structures of iron porphyrin complexes. In: Kadish KM, Smith KM, Guilard R (eds) Handbook of porphyrin science. Vol. 7. Word Scientific, New Jersey, London, pp 22–57
• 14. Liao M-S, Huang M-J, Watts JD (2010) Iron porphyrins with different imidazole ligands. A theoretical comparative study. J Phys Chem A 114:9554–9569
• 15. Mitiga CT, Iwazumi M (1981) Low-temperature EPR studies of highly anisotropic low-spin (protoporphyrinato) iron(III) complexes. J Am Chem Soc 103:4378–4381
• 16. Ogoshi H, Watanabe E, Yosida L et al. (1973) Synthesis and far-infrared spectra of ferric octaethylporphyne complexes. J Am Chem Soc 98:2845–2849
• 17. Palmer G (1983) Electron paramagnetic resonance of hemoproteins. In: Lever ABP, Gray HB (eds) Iron porphyrins. Part II. Addison-Wesley Publishing, London, pp 52–64
• 18. Shenoy GK, Wagner FE, Kalvius GM (1978) The measurement of the isomer shift. In: Shenoy GK, Wagner FE (eds) Mössbauer isomer shifts. North-Holland Publishing, Amsterdam, pp 49–110
• 19. Stanek J, Dziedzic-Kocurek K (2010) Magnetism of ferriprotoporphyrin IX monomers and dimers. J Magn Magn Mater 332:999–1003
• 20. Teschner T, Yatsunyk L, Schunemann V et al. (2006) Models of the membrane-bound cytochromes: Mössbauer spectra of crystalline low-spin ferriheme complexes having axial ligand plane dihedral angles ranging from 0° to 90°. J Am Chem Soc 128:1379–1389
• 21. Walker FA (1999) Magnetic spectroscopic (EPR, ESEEM, Mössbauer, MCD and NMR) studies of low-spin ferriheme centers and their corresponding heme proteins. Coord Chem Rev 185/186:471–534
• 22. Walker FA (2000) Proton NMR and EPR spectroscopy of paramagnetic metalloporphyrins. In: Kadish KM, Smith KM, Guilard R (eds) The porphyrin handbook. Vol. 5. Academic Press, San Diego, pp 81–183
• 23. Walker FA (2004) Models of the bis-histidine-ligated electron-transferring cytochromes. Comparative geometric and electronic structure of low-spin ferro- and ferrihemes. Chem Rev 104:589–615
• 24. Walker FA, Reis D, Balke VL (1984) Models of the cytochromes b. EPR Studies of low-spin iron(III) tetraphenylporphyrins. J Am Chem Soc 106:6888–6898
• 25. Yatsunyk LA, Carducci MD, Walker AF (2003) Low-spin ferriheme models of the cytochromes: correlation of molecular structure with EPR spectral type. J Am Chem Soc 125:15986–16005