N.C.S.R. "Demokritos"

Research

Department of Materials Science

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Molecular Magnetic and Bio-inorganic Spectroscopy

Researcher in charge: Y. Sanakis

The project aims toward (a) the understanding and synthetic simulation of the function of active centers in biological systems, which catalyze important processes (conversion of light energy to electric charge separation, water oxidation, electron/proton transfer etc), and (b) the study of the electronic and magnetic properties of synthetic multinuclear complexes of transition metals.
Emphasis is given in to the study of the tetranuclear Mn complex, which oxidizes water and constitutes part of the so called Photosystem II. In contemporary terminology Photosystem II could be characterized as a model multi-functional nanostructured system, whereas the Mn4 complex exhibits interesting analogies with the molecular magnets.
Members of the family of mixed valence transition metal complexes of biological interest are iron sulfur (Fe-S) clusters. Our research aims at the characterization and identification of such centers in recently isolated proteins.
Many synthetic multinuclear complexes of transition metals exhibit interesting properties, which render them candidates for technological applications in the field of magnetic data storage, magnetic cooling, quantum computing, or in their use as magnetic resonance contrast agents.

 

Infrastructure:
Instrumentation:
Upgraded cw Χ-band (9.5 GHz) EPR spectrometer (Bruker ER-200D). Temperature range: 2.0 – 300K.
Q-band (34 GHz) EPR spectrometer (comprised of several off-the-shelf units from a range of different manufacturers). Temperature range: 2.0 – 300K.
Mössbauer spectrometers:more

Software:
Simulation-Fitting of EPR spectra: SpinCount, Prof. Michael P. Hendrich, Dept Chemistry, Carnegie Mellon University, Pittsburgh, PA, U.S.A.
Simulation-Fitting of Mössbauer spectra: WMOSS, Dr T. Kent, SEE co, Edina, Minnesota, U.S.A.
Home built software

Research Topics

Personnel

NameProfessionRoleEmail addressTelephone
Vassilis PetrouleasPhysicistResearcher Avpetr@ims.demokritos.gr210 6503344
Ioannis SanakisPhysicistResearcher Asanakis@ims.demokritos.gr210 6503345
N. IoannidisChemistResearch Officernioannid@ims.demokritos.gr210 6503314
Haris GousiasVisiting Scientistharis@ims.demokritos.gr210 6503312
Dionyssios KoulougliotisVisiting Scientist
Georgia ZahariouVisiting Scientist210 6503312
Theodora TzimaPhD Studentdora@ims.demokritos.gr210 6503345
Department of Materials Science, N.C.S.R. "Demokritos", 153 10 Aghia Paraskevi, Attiki, phone: +30 210 6503381, fax: +30 210 6519430
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