MARILENA VASILESCU
- laboratory head -
senior researcher I
e-mail: mvasilescu@icf.ro
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MARILENA VASILESCU |
EDUCATION
1988 - Ph.D. in Physics
Department of Physics, Bucharest University
with thesis entitled:
Contributions to the Fluorescence Quenching and Polarization in Condensed Media
June 1965, B.S., Physics
Department of Physics (Specialization: Spectroscopy)
University of Bucharest, Romania
PROFESIONAL EXPERIENCE
Head of the Laboratory of Quantum Chemistry and Molecular Structure (2003 –present)
Institute of Physical Chemistry, Bucharest.
Senior Researcher I (1998 - present)
Institute of Physical Chemistry, Bucharest.
Senior Researcher II (1992 - 1998)
Institute of Physical Chemistry, Bucharest.
Senior Researcher III (1990 - 1992)
Institute of Physical Chemistry, Bucharest.
Researcher (1969 - 1990)
Center of Physical Chemistry, Bucharest.
Researcher (1965 - 1969)
Institute of Physics, Bucharest.
Lectures on luminescence spectroscopy for doctoral students (as appointed by Romanian Academy) 2005- present.
AWARDS
The Romanian Academy Award in Chemistry “Ilie Murgulescu”, 1998, for the group of papers published in the field of:
Intermolecular Interactions and Structure of Microheterogeneous Systems Studied by Time Resolved Fluorescence Method.
The Ministry of Education and Research (MEC-CNCSIS) award/ 2007 for the papers:
Synthesis and Characterisation of Europium activated Yttrium Oxide Fine Powders
and
Synthesis and properties of some new 4-amino-7-nitrobenzoxadiazole derivatives.
INTERNATIONAL RESEARCH CO-OPERATION PROGRAMS
University of Helsinki, Department of Physical Chemistry, Helsinki (Finland)
Prof. Helge Lemmetyinen
1992 - 1995
Studies on the aggregation of some surfactants using the fluorescence and spin probe technique
University of Uppsala, Department of Physical Chemistry, Uppsala (Sweden)
Prof. Mats Almgren
1992-2002
Studies on the dynamics and structure of reversed micelles
Technical University of Technology (Tampere, Finland) Department of Chemistry
Prof. Helge Lemmetyinen
1996 - 2003
Study of Self-Assembled Surfactant Aggregates, Using Fluorescence and Spin Probe Techniques
Technical University of Technology (Tampere, Finland)-Institute of Materials Chemistry
Prof. Helge Lemmetyinen
2004-2007
Structure and Dynamics of Pyrrolic Derivatives in Solutions and Self-assemblies, Studied by Spectroscopic Techniques
Technical University of Technology (Tampere, Finland)-Institute of Materials Chemistry
Prof. Helge Lemmetyinen
2005-2007
Dynamics of fast processes: from solutions to self assemblies, studied by spectrophotometric techniques
Superior Technical Institute, Technical University of Lisbon, Portugal
Prof. Luis Felipe Vieira Ferreira
Characterization by Advanced Techniques of Tetrapyrrolic Derivatives in Various Environments
Department of Chemical Engineering of the University of Patras (Greece)
Prof. Georgios Staikos
2008 - 2010
Core-shell colloidal nanoparticles, studied by fluorescence techniques (2008-2010).
MOST IMPORTANT FOREIGN VISITS
In the frame of the mentioned scientific cooperations, I have been invited many times for short and medium visits (3-4 months) in Sweden in the period 1992-2002, in Finland for short and medium visits in the period 1992-2007, and in Greece for 1 week in 1997.
PROFESSIONAL AFFILIATIONS
Romanian Society of Chemistry
RESEARCH ACTIVITY:
Photophysics:
Photophysical studies of
fluorescent aromatic molecules,
organometallic complexes,
luminophors,
exciplexes,
semiconductors and
conjugated polymers.
Photophysical research, studying fluorescence, phosphorescence, and excitation energy transfer.
Photophysical phenomena in micellar solutions, in particular fluorescence quenching.
Fluorescence probing of organized molecular assemblies, gels and macromolecules.
Light emission and amplification.
Photoluminescence and Chemiluminescence.
Colloids and Surfaces:
Structure and dynamics of micelles, microemulsions and lipid vesicles.
Self-organization of nonionic surfactants in solution and in thin films.
Interaction of proteins with surfactants.
Growth of organic or inorganic particles in organized molecular assemblies.
Water-soluble polymers.
Core-shell colloidal nanoparticles.
Materials:
Chlorophylls and porphyrins.
Rare earth oxysulphide phosphors.
Medicaments.
Sol-gel chemistry.
Semiconductor nanoparticles.
Organic-inorganic nanocomposite gels.
Bulk materials and thin films.
Organic light-emitting diodes.
New materials for light emission and amplification.
Photosensitive membranes.
Photocatalysis:
Heterogeneous photocatalysis for water and air purification.
Dye-sensitized photoelectrochemical solar cells.
Principal methods used:
* Steady-state Fluorescence spectroscopy and UV-VIS absorption spectroscopy
* Time-resolved Fluorescence Techniques
* Fluorescence Probe Method
- Fluorescence probe technique in the study of the aggregation of non-ionic surfactants
- Structural information (local polarity, microviscosity, order degree, penetrability) regarding reverse micelle in the follwing systems:
water/polyoxyethylene(4)nonylphenolcyclohexane,
water/Brij 30/decane,
water/polyoxyethylene(4)-dodecylether/decane
- Study of solubilization in the shell of micelles in the polyoxyethylene(9)nonylphenol/water system
- Structural characterization of the inverse suspension of cyclohexane/polyoxyethylene(4) nonylphenol/ acrylamide/water as the initial system for acrylamide polymerization
- Micellization and Micellar structure of poly(ethylene oxide)/poly(propylene oxide)/polyethylene oxide) triblock copolymer in water solution
- Dynamics of proteins in reverse micelles
* Chemiluminescence
LABORATORY EXPERIENCE
- Preparation of anorganic luminophors by chemical means
- Fluorescence and Chemiluminescence basic research with both organic and anorganic substances, colloids and mesoporous solids
- Experienced with vacuumm techniques
- Adsorption of various compounds on surfaces under activation conditions
- Experienced with spectrochemical analysis
- Data taking over, storage and process including IBM-PC compatible facilities
INTERNATIONAL GRANTS
- NATO Science for Peace Grant - Synthesis of mesoporous aluminas and their application
as catalyst support, 2000-2003.
NATIONAL GRANTS AND PROJECTS
Project manager of the following grants (for the last five years):
The study of the structure and properties of some tetrapirrolic meso-substituted compounds
2005-2007
MEC-CNCSIS
The effect of trivalent counterions on the intermicellar aggregates interactions and on the stability of colloidal system
Romanian Academy Grant
2003-2004
1,3-dipolar cycloaddition in the case of new heterocyclic mesoionic system. New compounds with fluorescent properties
MEC-CERES
2002-2004
Basic principles of the obtaining of the polymer- anorganic filmogen nanohybrides
MEC-CERES
2002-2004
The characterization by luminescence spectroscopy of some materials with luminescent properties
MEC-MATNANTECH
2005-2006
-The mixed condensed systems with phtalocyanines and others metallic complexes with biomedical and ecological applications
MEC-CEEX
2005-2008
The luminescent materials for opto-electronic devices
MEC-CEEX
2005-2008
-Composite chromogen-polymeric systems for photoinduced superficial structures and ion-selective sensors
MEC-CEEX
2006-2008
PUBLICATIONS
More than 100 scientific publications, three Romanian patents, and over 80 participations at conferences.