Maria João Seixas de Melo

Investigador Convidado
Secção de Química
(+351) 212948322
(+351) 212948550

Publicações Representativas

"Photochemistry of 2-(2-Furyl) benzimidazole (Fuberidazole®)"
M. J. Melo, F. Pina, A. L. Maçanita, E. C. Melo, C. Herrmann, R. Först(...)
Z. Naturforsch., 1992, Vol. 476, 1431-1437.

"Determination of acid-base equilibria of organic pollutants: the steady state fluorescence emission method"
M. J. Melo, E. Melo, F. Pina
Arch. Env. Cont. Tox., 1994, Vol. 26, 510-520.

"Photophysical properties and Photodegradation Mechanism 0f 2-(2(prime)-Furanyl)-1H-benzimidazole (Fuberidazole)"
M. J. Melo, A. L. Maçanita, E. C. Melo, H. Wamhoff, F. Pina
J. Photochem. Photobiol., 1994, Vol. 83, 237-244.

"The shape of acid-base fluorescence emission titration curves in the presence of buffer and quenching effects"
M. J. Melo; M. A. Bernanrdo; E. Melo; F. Pina
J. Chem. Soc. Faraday Trans, 1996, Vol. 92, 957-968.

"Photochemistry of 3,4(prime)-Dimethoxy-7-Hydroxyflavylium Chloride. Photochromism and Excited State Proton Transfer"
F. Pina, L. Benedito, M. J. Melo, A. J. Parola, M. A. Bernardo
J. Chem. Soc. Faraday Trans, 1996, Vol. 92, 1693-1699.

"An easy and inexpensive flash spectroscopy experiment"
M. Maestri, R. Ballardini, F. Pina, M. J. Melo
J. Chem. Ed., 1997, Vol. 74, 1314-1316.

"Flash Photolysis of 4(prime),7-Dihydroxyflavylium perchlorate"
F. Pina, M. J. Melo, R. Ballardini, L. Flamigni, M. Maestri
New. J. Chem., 1997, Vol. 21, 969-976.

"Photochromism of 4(prime)-methoxyflavylium perchorate. A " write-lock-read-unlock-erase" molecular switching device"
F. Pina, M. J. Melo, M. Maestri, R. Ballardini, V. Balzani
J. Am. Chem. Soc., 1997, Vol. 119, 5556-5561.

"Structural transformations of the Synthetic Salt 4(prime),7-Dihydroxyflavylium Chloride in Acid and Basic Aqueous Solutions. Part 1 - Ground-State"
F. Pina, L. Benedito, M. J. Melo, A. J. Parola, J. C. Lima e A. L. (...)
Anales de Quimica, Int. Ed., 1997, Vol. 93, 111-118.

"Excited State Proton Transfer in Synthetic Flavylium Salts. 4-Methyl-7-Hydroxyflavylium and 4(prime),7-Dihydroxyflavylium. Example of a four level molecular device to invert the population of the excited state"
F Pina, M.J. Melo, H. Santos, J. C, Lima, I. Abreu, R. Ballardini, M. (...)
New. J. Chem., 1998, 1093-1098.

"Multistate/Multifunctional Molecular-Level Systems. Light and pH Switching between the Various Forms of a Synthetic Flavylium Salt"
F. Pina, A. Roque, M. J. Melo, M. Maestri, L. Belladelli, V. Balzani
Chem. Eur. J., 1998, Vol. 4, 1184-1191.

"pH-Controlled Photochromism of Hydroxyflavylium ions"
F. Pina, M. J. Melo, A. J. Parola, M. Maestri, V. Balzani
Chem. Eur. J., 1998, Vol. 4, 2001-2007.

"Chemosensors displaying pH controlled multistage fluorescence emission"
F. Pina, M. J. Melo, M. A. Bernardo, S. V. Luis, E. Garcia-España
J. Photochem. Photobiol., 1999, Vol. 126, 65-69.

"Photo- and pH induced Transformations of Flavylium Cation: "Write-lock-read-unlock-erase" cycles"
F. Pina, M. J. Melo, M. Maestri, P. Passaniti, N. Camaioni, V. Balzani
Eur. J. Org. Chem., 1999, 3199-3207.

"Thermodynamics and Fluorescence Emission Studies on Potential Molecular Chemosensors for ATP Recognition in aqueous solution"
M. T. Albelda, M. A. Bernardo, E. Garcia-España, M. L. Godino-Salido, (...)
J. Chem. Soc. Perkin Trans. 2, 1999, 2545-2549.

"Phtodegradation of acrylic resins used in the conservation of stone"
M. J. Melo; S. Bracci; M. Camaiti; O. Chiantore; F. Piacenti
Polym. Degrad. Stab., 1999, Vol. 66, 23-30.

"Artificial Chemical systems capable of mimicking some elementary properties of neurons"
F. Pina, M. J. Melo, M. Maestri, P. Passaniti, V. Balzani
J. Am. Chem. Soc., 2000, Vol. 122, 4496-4498.

"On the red colour of Raspberry (Rubus idaeus)"
M. J. Melo, M. Moncada, F. Pina
Tetrahedron Lett., 2000, Vol. 41, 1987-1991.

"Photochemistry of Luteolinidin. Write-lock-read-unlock-erase with a natural compound"
M. J. Melo, S. Moura, A. Roque, M. Maestri, F. Pina
J. Photochem. Photobiol., 2000, Vol. 135, 33-39.

"Micelle effect on ground and excited state proton transfer reactions involving the 4-methyl, 7-hydroxyflavylium cation"
F. Pina, M. J. Melo, S. Alves, R. Ballardini, M. Maestri, P. Passaniti
New. J. Chem., 2001, Vol. 25, 747-752.

"Micelle effects on multistate/multifunctional systems based on photochromic flavylium compounds. The case of Luteolinidin"
M. J. Melo, S. Moura, M. Maestri, F. Pina,
J. Mol. Structure, 2002, Vol. 612, 245-253.

""Complexation of Aluminium(III) by Anthocyanins and Synthetic Flavylium Salts. A Source for Blue and Purple Color"."
M. C. Moncada; S. Mora; M. J. Melo; A. Roque; C. Lodeiro; F. Pina
Inorg. Chim. Acta, 2003, Vol. 356, 51-61.

"Correlating natural ageing and xenon irradiation of Paraloid B72 applied on stone"
S. Bracci; M. J. Melo
Polym. Degrad. Stab., 2003, Vol. 80, 533-541.

"Intramolecular Excimer Formation in a Tripodal Polyamine Receptor Containing Three Naphtalene Fluorophores."
M. T. Albelda, E. García-España, L. Gil, João C. Lima, C. Lodeiro, J. (...)
J. Phys. Chem. B, 2003, Vol. 107, 6573-6578.

"Selective fluorescent chemosensor for Zinc(II). Exciplex formation in solution and solid state"
A. Bencini; E. Berni; A. Bianchi; P. Fornasari; C. Giorgi; J. C. Lima;(...)
Dalton Transations, 2004, 2180-2187.