Publications

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2009
Rodriguez, L, Delgado-Pinar E, Sornosa-Ten A, Alarcon J, Garcia-Espana E, Cano M, Lima JC, Pina F.  2009.  Effect of Water/Carboxymethylcellulose Gel on the Excimer Formation of Polyamine Ligands Functionalized with Naphthalene. Journal of Physical Chemistry B. 113:15455-15459., Number 47 Abstract
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Rodriguez, L, Ferrer M, Rossell O, Duarte FJS, Santos GA, Lima JC.  2009.  Solvent effects on the absorption and emission of [Re(R(2)bpy)(CO)(3)X] complexes and their sensitivity to CO2 in solution. Journal of Photochemistry and Photobiology a-Chemistry. 204:174-182., Number 2-3 Abstract
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Cano, M, Rodriguez L, Lima JC, Pina F, Dalla Cort A, Pasquini C, Schiaffino L.  2009.  Specific Supramolecular Interactions between Zn2+-Salophen Complexes and Biologically Relevant Anions. Inorganic Chemistry. 48:6229-6235., Number 13 Abstract
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Cano, M, Rodriguez L, Lima JC, Pina F, Dalla Cort A, Pasquini C, Schiaffino L.  2009.  Specific Supramolecular Interactions between Zn2+-Salophen Complexes and Biologically Relevant Anions. Inorganic Chemistry. 48:6229-6235., Number 13 Abstract
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Frade, RFM, Rosatella AA, Marques CS, Branco LC, Kulkarni PS, Mateus NMM, Afonso CAM, Duarte CMM.  2009.  Toxicological evaluation on human colon carcinoma cell line (CaCo-2) of ionic liquids based on imidazolium, guanidinium, ammonium, phosphonium, pyridinium and pyrrolidinium cations. Green Chemistry. 11:1660-1665., Number 10 Abstract
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2008
Vidinha, P, Lourenco NMT, Pinheiro C, Bras AR, Carvalho T, Santos-Silva T, Mukhopadhyay A, Romao MJ, Parola J, Dionisio M, Cabral JMS, Afonso CAM, Barreiros S.  2008.  Ion jelly: a tailor-made conducting material for smart electrochemical devices, 2008. Chemical Communications. :5842-5844. Abstract

We present a new concept for the design of a polymeric conducting material that combines the chemical versatility of an organic salt ( ionic liquid) with the morphological versatility of a biopolymer ( gelatin); the resulting 'ion jelly' can be applied in electrochemical devices, such as batteries, fuel cells, electrochromic windows or photovoltaic cells.

Bazzicalupi, C, Bencini A, Bianchi A, Danesi A, Faggi E, Giorgi C, Lodeiro C, Oliveira E, Pina F, Valtancoli B.  2008.  Interaction of polyamine macrocycles with Zn(II) and ATP in aqueous solution. Binary and ternary systems. A potentiometric, NMR and fluorescence emission study. Inorganica Chimica Acta. 361:3410-3419., Number 12-13 Abstract
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2007
Frade, RFM, Matias A, Branco LC, Afonso CAM, Duarte CMM.  2007.  Effect of ionic liquids on human colon carcinoma HT-29 and CaCo-2 cell lines. Green Chemistry. 9:873-877., Number 8 Abstract
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2006
Bazzicalupi, C, Bencini A, Bianchi A, Borsari L, Danesi A, Giorgi C, Lodeiro C, Mariani P, Pina F, Santarelli S, Tamayo A, Valtancoli B.  2006.  Basicity and coordination properties of a new phenanthroline-based bis- macrocyclic receptor. Dalton Transactions. :4000-4010., Number 33 Abstract
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Bazzicalupi, C, Bencini A, Bianchi A, Borsari L, Danesi A, Giorgi C, Mariani P, Pina F, Santarelli S, Valtancoli B.  2006.  Coordination features of a terpyridine-containing polyamine receptor. Effect of protonation on the photophysical properties of the complexes. Dalton Transactions. :5743-5752., Number 48 Abstract
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Gago, S, Dias AS, Monteiro B, Pillinger M, Valente AA, Santos TM, Goncalves IS.  2006.  Synthesis and characterization of layered double hydroxides intercalated by an oxomolybdenum complex. Journal of Physics and Chemistry of Solids. 67:1011-1015., Number 5-6 Abstract
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2005
Bazzicalupi, C, Bencini A, Bianchi A, Danesi A, Giorgi C, Lodeiro C, Pina F, Santarelli S, Valtancoli B.  2005.  A zinc(II)-based receptor for ATP binding and hydrolysis. Chemical Communications. :2630-2632., Number 20 Abstract
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2003
Roque, A, Lodeiro C, Pina F, Maestri M, Dumas S, Passaniti P, Balzani V.  2003.  Multistate/multifunctional systems. A thermodynamic, kinetic, and photochemical investigation of the 4 '-dimethylaminoflavylium compound. Journal of the American Chemical Society. 125:987-994., Number 4 Abstract
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Albelda, MT, Aguilar J, Alves S, Aucejo R, Diaz P, Lodeiro C, Lima JC, Garcia-Espana E, Pina F, Soriano C.  2003.  Potentiometric, NMR, and fluorescence-emission studies on the binding of adenosine 5 '-triphosphate (ATP) by open-chain polyamine receptors containing naphthylmethyl and/or anthrylmethyl groups. Helvetica Chimica Acta. 86:3118-3135., Number 9 Abstract
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2002
Albelda, MT, Diaz P, Garcia-Espana E, Lima JC, Lodeiro C, de Melo JS, Parola AJ, Pina F, Soriano C.  2002.  Switching from intramolecular energy transfer to intramolecular electron transfer by the action of pH and Zn2+ co-ordination, 2002. Chemical Physics Letters. 353:63-68. Abstract

Intramolecular electron (eT) and energy transfer (ET) have shown to occur in a covalently linked donor-acceptor (CLDA) system consisting of a naphthalene donor covalently linked through a polyamine chain connector to an anthracene acceptor; the connector has been chosen in order to switch ON or OFF the energy flux as a function of its protonation state as well as by co-ordination to Zn2+. The largest energy transfer efficiency (eta = 0.61) occurs for the fully protonated form (pH < 2), while at pH > 9 (eT) from the lone pairs of the nitrogens to the excited fluorophore takes place, leading to complete quenching of the emission. On the other hand at neutral and basic pH values. coordination of Zn2+ prevents the eT quenching allowing the ET process to occur. (C) 2002 Elsevier Science B.V. All rights reserved.

de Melo, JS, Albelda MT, Diaz P, Garcia-Espana E, Lodeiro C, Alves S, Lima JC, Pina F, Soriano C.  2002.  Ground and excited state properties of polyamine chains bearing two terminal naphthalene units. Journal of the Chemical Society-Perkin Transactions 2. :991-998., Number 5 Abstract
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Pina, F, Lima JC, Lodeiro C, de Melo JS, Diaz P, Albelda MT, Garcia-Espana E.  2002.  Long range electron transfer quenching in polyamine chains bearing a terminal naphthalene unit. Journal of Physical Chemistry a. 106:8207-8212., Number 35 Abstract
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2001
Calhorda, MJ, Drew MGB, Felix V, Fonseca LP, Gamelas CA, Godinho S, Goncalves IS, Hunstock E, Lopes JP, Parola AJ, Pina F, Romao CC, Santos AG.  2001.  Metal-metal interaction in polynuclear complexes with cyanide bridges: synthesis, characterisation, and theoretical studies, 2001. Journal of Organometallic Chemistry. 632:94-106. Abstract

The reaction of the cyanide anion [M(CO)(5)CN](-) (M = Cr or Mo) with metallocenes of Groups 4 and 6 produced polynuclear complexes of the type [CpCp 'M(CO){-NC-M ' (CO)(5)}]BF4 (M = M0, W; M ' = Mo, Cr, Cp '= Cp, Ind), Cp2TiCl{-NC-Mo(CO)(5)} and Cp2Ti{-NC-Mo(CO)(5)}(2). These complexes were characterised by H-1-, C-13- and Mo-95-NMR, IR and UV-vis spectroscopies, elemental analysis and examined by cyclic voltammetry. These methods show that the [M(CO)(5)CN]- ligands shift the electron density towards the metallocene centres. The complex [Cp2W(CO){-NC-Mo(CO)(5)}](+) is additionally examined by single crystal X-ray structure determination. The Density Functional Theory (DFT) calculations with the ADF program were performed on selected compounds to understand the nature of the redox processes taking place. Compared with a nitrile, the coordination of a [M(CO)-,CN]- fragment to the metallocene moiety does not significantly change the geometrical features. but leads to the stabilisation of the HOMO of the latter. with all the oxidation processes occurring in the pentacarbonyl moiety of the binuclear species. Time-dependent DFT calculations were used to identify the band appearing in the visible spectrum of Cp2TiCl{-NC-Mo(CO)(5)} as a Mo to Ti charge transfer. (C) 2001 Elsevier Science BN. All rights reserved.

Dias, FB, Lima JC, Pierola IF, Horta A, Macanita AL.  2001.  Internal dynamics of poly(methylphenylsiloxane) chains as revealed by picosecond time resolved fluorescence. Journal of Physical Chemistry a. 105:10286-10295., Number 45 Abstract
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Albelda, MT, Bernardo MA, Diaz P, Garcia-Espana E, de Melo JS, Pina F, Soriano C, Santiago VLE.  2001.  Polyamines containing naphthyl groups as pH-regulated molecular machines driven by light. Chemical Communications. :1520-1521., Number 16 Abstract
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2000
Dias, FB, Lima JC, Macanita AL, Clarson SJ, Horta A, Pierola IF.  2000.  Anomalous fluorescence of linear poly(methylphenylsiloxane) in dilute solution at temperatures below-50 degrees C. Macromolecules. 33:4772-4779., Number 13 Abstract
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Dias, FB, Lima JC, Macanita AL, Horta A, Pierola IF.  2000.  Dynamics of cyclic methylphenyltrisiloxane in the picosecond to nanosecond time range. Journal of Physical Chemistry a. 104:17-24., Number 1 Abstract
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Elisei, F, Lima JC, Ortica F, Aloisi GG, Costa M, Leitao E, Abreu I, Dias A, Bonifacio V, Medeiros J, Macanita AL, Becker RS.  2000.  Photophysical properties of hydroxy-substituted flavothiones. Journal of Physical Chemistry a. 104:6095-6102., Number 25 Abstract
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1994
Lima, JC, DANESH P, FIGUEIREDO P, PINA FS, MACANITA A.  1994.  EXCITED-STATES OF ANTHOCYANINS - THE CHALCONE ISOMERS OF MALVIDIN 3,5-DIGLUCOSIDE. Photochemistry and Photobiology. 59:412-418., Number 4 Abstract
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