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Thermal stability of amino acid-(tyrosine and tryptophan) coated magnetites

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Abstract

The thermal stability of two amino acid-(tyrosine and tryptophan) coated magnetite and their corresponding precursors, [Fe III2 FeII(Tyr)8]·9H2O and [Fe III2 FeII(Trp)2(OH)4](NO3)2·8H2O (where tyrosine=Tyr and tryptophan=Trp), was analyzed in comparison with free amino acids. The complexes present a lower thermal stability relative to the free ligand, due to the catalytic effect introduced by the iron cation and the presence of NO −3 groups. The presence of NO −3 group determines also a different degradation’s stoichiometry of the amino acid anion comparative with the one expressed by the free ligand molecule. The amino acid bonded to magnetite decomposes in two steps, its presence inducing an increasing of γ-Fe2O3→Fe2O3 conversion temperature.

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References

  1. O. Z. Yeşilel and H. Ölmez, J. Therm. Anal. Cal., 86 (2006) 211.

    Article  Google Scholar 

  2. N. T. Madhu, P. K. Radhakrishnan, E. Williams and W. Linert, J. Therm. Anal. Cal., 79 (2005) 157.

    Article  CAS  Google Scholar 

  3. M. Badea, R. Olar, D. Marinescu, G. Vasile and S. Stoleru, J. Therm. Anal. Cal., 80 (2005) 679.

    Article  CAS  Google Scholar 

  4. A. Ito, M. Shimkai, H. Honda and T. Kobayashi, J. Biosci. Bioenerg., 100 (2005) 1.

    Article  CAS  Google Scholar 

  5. S. Mornet, S. Vasseur, F. Grasset and E. Duguet, J. Mater. Chem., 14 (2004) 2161.

    Article  CAS  Google Scholar 

  6. S. Yu and G. H. Chow, J. Mater. Chem., 14 (2004) 2781.

    Article  CAS  Google Scholar 

  7. N. Fauconnier, J. N. Pons and A. Bee, J. Colloid Interface Sci., 194 (1997) 427.

    Article  CAS  Google Scholar 

  8. M. H. Sousa, J. C. Rubbin and F. A. Tourinho, J. Magn. Magn. Mater., 225 (2001) 67.

    Article  CAS  Google Scholar 

  9. K. Nakamoto, ’Infrared and Raman Spectra of Inorganic Compounds’, Ed. 4, J. Wiley&Sons, 1986, p. 223.

  10. O. Carp, L. Patron, L. Diamandescu and A. Reller, Thermochim. Acta, 390 (2002) 169.

    Article  CAS  Google Scholar 

  11. N. J. Tang, W. Zhong, H. Y. Jiang, X. L. Wu, W. Liu and Y. W. Du, J. Mag. Mag., 282 (2004) 92.

    Article  CAS  Google Scholar 

  12. O. Carp, D. Gingasu, I. Mindru and L. Patron, Thermochim. Acta (in press).

  13. M. Sikorska-Iwan, R. Mrozek and Z. Rzączyńska, J. Therm. Anal. Cal., 60 (2000) 139.

    Article  CAS  Google Scholar 

  14. R. R. Mahajan, P. S. Makashir and J. P. Agrawal, J. Therm. Anal. Cal., 65 (2001) 935.

    Article  CAS  Google Scholar 

  15. I. M. M. Kenawy, M. A. Hafez and R. R. Lashein, J. Therm. Anal. Cal., 65 (2001) 723.

    Article  CAS  Google Scholar 

  16. K. Mészáros Szécsény, V. M. Leovac, Ž. K. Jaćimović and G. Pokol, J. Therm. Anal. Cal., 74 (2003) 943.

    Article  Google Scholar 

  17. B. N. Sivasankar and L. Ragunath, Thermochim. Acta, 397 (2003) 237.

    Article  CAS  Google Scholar 

Download references

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Authors and Affiliations

  1. Institute of Physical Chemistry ‘Ilie Murgulescu’, Splaiul Independentei, No. 202, 060021, Bucharest, Romania

    L. Patron, G. Marinescu, D. Culita & O. Carp

  2. Institute of Atomic Physics, National Institute of Material Physics, P.O.Box MG-7, 76900, Bucharest, Romania

    L. Diamandescu

Authors
  1. L. Patron
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  2. G. Marinescu
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  3. D. Culita
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  4. L. Diamandescu
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  5. O. Carp
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Correspondence to O. Carp.

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Patron, L., Marinescu, G., Culita, D. et al. Thermal stability of amino acid-(tyrosine and tryptophan) coated magnetites. J Therm Anal Calorim 91, 627–632 (2008). https://doi.org/10.1007/s10973-006-8082-4

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  • DOI: https://doi.org/10.1007/s10973-006-8082-4

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