Stability study of tyrosinate radical in a restricted phyllomorphous medium (Journal article)

Gournis, D./ Deligiannakis, Y./ Karakassides, M. A./ Boussac, A./ Ioannidis, N./ Petridis, D.

The elusive tyrosinate radical has been stabilized in the layers of synthetic laponite on intercalated tyrosinate ester molecules. According to EPR, XRD, and FT-IR data, the tyrosinate ester molecules adopt a horizontal orientation between the clay surfaces, with the aromatic rings almost perpendicular to the clay layers, giving an intersheet separation of 4.8 Angstrom. The radical remains stable for over two months, while it is quickly reduced by nitric oxide. The observed long-term stability of the radical is due to electrostatic interactions with the negative surface of the clay as well as to sequestration phenomena which protect the radical from polymerization.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών
Keywords: resonance raman-spectroscopy,aromatic-molecules,photosystem-ii,montmorillonite,clays,smectite,polymerization,interlayer,hectorite,sorption
URI: https://olympias.lib.uoi.gr/jspui/handle/123456789/14503
ISSN: 0743-7463
Link: <Go to ISI>://000179719600061
Publisher: American Chemical Society
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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