|Departamento de Engenharia Química e
Instituto Superior Técnico
Universidade Técnica de Lisboa
Av. Rovisco Pais - 1049-001
phone: (+351) 21 8419606
beginning of my
scientific career, the different research projects in which I have had
opportunity to participate allowed me to acquire a broad experience
with a large variety of optical techniques that I had to deal with,
particularly laser induced fluorescence.
The collaboration with several research groups gave me an invaluable experience in interdisciplinary areas, including chemical physics, biophysics, photonics, always with the use of spectroscopy techniques as common denominator.
Currently, I am studying energy transfer mechanisms and conformational relaxation processes in conjugated polymers, and new luminescent metal complexes and their composites with conjugated polymers, for potential application in light emitter diodes (LED). In order to provide deeper insight into the relaxation along the polymer chain, different oligomers are been used as model compounds.
The structural relaxation of these compounds is studied by picosecond time-resolved fluorescence techniques in solvents of differing viscosity. The multiexponential fluorescence decays observed in both films and solution contain information on the processes resulting from excitation. The incorporation of metal complexes containing species that convert a high fraction of the input electric charge to emitted light, might be used to reach an important improvement in the performance of LEDs. Therefore, new luminescent metal complexes including the use of conjugated polymer hosts are being examined in order to evaluate potential applications of these materials in photonic devices.
Domain of specializations
Optical Spectroscopy of Materials.
Present research interests
fingerprinting of multiheme cytochromes from the cytochrome c3 family”
Roberto E. Di Paolo, Patrícia M. Pereira, Inês Gomes, Filipa M.A. Valente, Inês A.C. Pereira, and Ricardo Franco. J. Biol. Inorg. Chem., 2006 11: 217-224.
“On-centered growth of periodically poled LiNbO3:Er3+:Yb3+ crystals”
Eugenio Cantelar, Juan Antonio Sanz-García, Roberto Emir Di Paolo, Juan Enrique Muñoz-Santiuste, Fernando Cussó. Ferroelectrics, 334: 125-134, 2006.
“Spectroelectrochemistry of type II cytochrome c3 on a glycosylated self-assembled monolayer”
Inês Gomes, Roberto E. Di Paolo, Patrícia M. Pereira, Inês A.C. Pereira, Lígia M. Saraiva, Soledad Penadés, and Ricardo Franco. Langmuir, 2006, 22 (24), 9809-9811.
“Electronic Spectral and Photophysical Properties of Some p-phenylenevinylene Oligomers in Solution and Thin Films”
J. Seixas de Melo, J. Pina, H. D. Burrows, R. E. Di Paolo, and A. L. Maçanita Chemical Physics, 330 (2006) 449-456.
“Conformational Relaxation of p-Phenylenevinylene (PV) Trimers in Solution, studied by Picosecond Time-Resolved Fluorescence”
R. E. Di Paolo, J. Seixas de Melo, J. Pina, H. D. Burrows, J. Morgado and A. L. Maçanita Chem.Phys.Chem. 2007, 8, 2657-2664.
“Modulating the Emission Intensity of Poly-(9,9-bis(6'-N,N,N-trimethylammonium)hexyl)-fluorenephenylene) bromide through interaction with Sodium Alkylsulfonate surfactants” M. Monteserín, H. D. Burrows, A. J. M. Valente, V. M. M. Lobo, R. Mallavia, M. J. Tapia, I. X. García-Zubiri, R. E. Di Paolo, A. L. Maçanita, J. Phys. Chem. B, 111 (48), 13560 -13569, 2007.