Head:   Dr.Gabriel M. Bilmes Members:             • Lic. Mariana Mesaros             • Ing. Anibal Laquidara

History

Work topics

• Study of photophysics and photochemical processes of molecules in solution by using lasers as excitation sources and photoacoustic, spectroscopic and luminescence techniques for their characterization and analysis.
• Identification of energy conversion mechanisms to transient states (tripletes, fotoisómeros, etc.); characterization of absorption  and radiation emission processes, stimulated emission, absorption of excited states and multiphotonic processes in:
• Development and implementation of high-resolution and high-sensitivity laser techniques (laser-induced photoacoustics, time-resolved photoacoustics, laser-induced fluorescence and absorption ) for the realization of the proposed studies.
• Study of cavitation processes in plants using acoustic detection.

The most relevant works

• New photocalorimetric references for UV excitation.
  Chemical Physics Letters 250, 198-202(1996).
• A Photophysical study of purines and theophylline by using laser induced photoacoustic spectroscopy
  Photochemistry and Photobiology 64, 777-784(1996).
• Non toxic, water soluble photocalorimetric reference compounds for UV and visible excitation.
  Chemical Physics Letters 304, 167-172(1999).
• Photophysics of Rhodamine B interacting with silver spheroids
  Journal of colloid and Interface Science 218, 112-117(1999).
• Photophysical properties of Corrphycenes Spectrochemica.
  Acta A56, 2043-2048(2000).
• Volume and Enthalpy Changes of Peroxodiphosphate Dissociation.
  Chemical Physics Letters 373, 176-181(2003).
• The photophysics of nitrocarbazoles studied by using spectroscopic, photoacoustic and luminescence techniques.
  Photochemical and Photobiological Sciences 2, 808-816(2003).
• The photophysics of some UV-MALDI matrices studied by using spectroscopic, photoacoustic and luminescence techniques.
  Chemical Physics Letters. 426, 334 (2006).

Collaboration with other Institutions and Research groups

• Max fur Strahlenchemie, Mulheim a.d. Ruhr, Alemania (Prof. S.E. Braslavsky).
• Universidad de Parma, Italia, Depto.de Física (Prof. C. Viappiani).
• Universidad de Santander, Bucaramanga, Colombia (Prof.Orlando Haya).
• CIHIDECAR-CONICET, Q. Orgánica, FCEyN-UBA Argentina (Prof. R.Erra Balsells).
• INIFTA-UNLP-La Plata, Argentina (Dr. Daniel Martire).
• INQIMAE- FCEyN-UBA (Dr. Pedro Aramendia).
• Facultad de Agronomía y Agroindustrias, UNSE, Argentina ( Dr. Claudio Borsarelli).
• IFEVA–Facultad de Agronomía- UBA.

Available equipament

• Pulsed Nd-YAG lasers (1064 nm, 532 nm, 355 nm, 266 nm) and OPO.
• A CW Argon laser, continuous wave dye laser.
• Systems for photoacoustics measurements (cells, mounts detectors, processing).
• A system for singlet oxigen detection.

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