Resume. -Les spectres Mossbauer des complexes organometalliques (6-aminopurine-Fe, adenosine-3'-phosphate-Fe) et (guanosine3'-phosphate-Fe) ont et6 BtudiCs sur des echantillons bruts et irradies aux UV. Le deplacement du maximum d'absorption dans les spectres optiques et les changements observes dans les parambtres des spectres Mossbauer des complexes prkcitds ont permis de supposer que l'interaction dans les &chantillons irradies aux UV a lieu dans la partie de la base organique complexe au

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... tact direct des ions fer. Abstract. -The Mossbauer spectra of organo-metallic complexes (6-aminopurine-Fe, adenosine-3'-phosphate-Fe and guanosine-3'-phosphate-Fe) of native and UV-irradiated samples have been studied. The shift of absorption maximum in light spectrum and the identified changes of Mossbauer spectra parameters of the above mentioned complexes show that the interaction of UV-irradiated samples takes place at that part of the complex organic base is in direct moiety with iron ions. Article published online by EDP Sciences and available at http://dx.