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Aqueous solution and solid state interactions of lanthanide ions with a methacr...
Rubio, F.; García, F.; Burrows, H. D.; Pais, A. A. C. C.; Valente, A. J. M.; Tapia, M. J.; García, J. M.The interaction between trivalent lanthanide ions and poly(1,4,7,10,13-pentaoxacyclopentadecan-2-yl-methyl methacrylate), PCR5, in aqueous solution and in the solid state have been studied. In aqueous solution, evidence of a weak interaction between the lanthanides and PCR5 comes from the small red shift of the Ce(III) emission spectra and the slight broadening of the Gd(III) EPR spectra. From the Tb(III) lifet...
Interactions between surfactants and 1,4-phenylene-[9,9-bis(4-phenoxy-butylsulf...
Burrows, H. D.; Lobo, V. M. M.; Pina, J.; Ramos, M. L.; Melo, J. Seixas de; Valente, A. J. M.; Tapia, M. J.; Pradhan, S.; Scherf, U.; Hintschich, S. I.The interaction between the water-soluble anionic conjugated copolymer poly1,4-phenylene-[9,9-bis(4-phenoxy-butylsulfonate)]fluorene-2,7-diyl (PBS-PFP) and various surfactants has been studied in aqueous solution by UV-vis absorption spectra, fluorescence and electrical conductivity. It is suggested from the linear dependence of absorbance, fluorescence and electrical conductivity on concentration that in the a...
Interaction between the Water Soluble Poly1,4-phenylene-[9,9-bis(4-phenoxy buty...
Tapia, M. J.; Burrows, H. D.; Valente, A. J. M.; Pradhan, S.; Scherf, U.; Lobo, V. M. M.; Pina, J.; Melo, J. Seixas deThe interaction has been studied in aqueous solutions between a negatively charged conjugated polyelectrolyte poly1,4-phenylene-[9,9-bis(4-phenoxybutylsulfonate)]fluorene-2,7-diyl copolymer (PBS-PFP) and several cationic tetraalkylammonium surfactants with different structures (alkyl chain length, counterion, or double alkyl chain), with tetramethylammonium cations and with the anionic surfactant sodium dodecyl...
A comparative study of water soluble 5,10,15,20-tetrakis(2,6-dichloro-3-sulfoph...
Monteiro, Carlos J. P.; Pereira, Mariette M.; Azenha, M. Emilia; Burrows, Hugh D.; Serpa, Carlos; Arnaut, Luís G.; Tapia, M. J.; Sarakha, Mohamed5,10,15,20-Tetrakis(2,6-dichloro-3-chlorosulfophenyl)porphyrin and its tin and zinc complexes were synthesized with high yields and fully characterized. The corresponding water-soluble 5,10,15,20-tetrakis(2,6-dichloro-3-sulfophenyl)porphyrins were obtained by hydrolysis with water. An extensive photophysical study of the new water soluble porphyrinic compounds was carried out including absorption and fluorescen...
Lanthanide Ion Interaction with a Crown Ether Methacrylic Polymer, Poly(1,4,7,1...
Tapia, M. J.; Burrows, H. D.; García, J. M.; García, F.; Pais, A. A. C. C.The interaction between trivalent lanthanide ions and the polymer poly(1,4,7,10-tetraoxacyclododecan-2-ylmethyl methacrylate) (PCR4) containing pendant 1,4,7,10-tetraoxacyclododecane (12-crown-4) groups has been studied by various spectroscopic techniques, calorimetry and theoretical calculations. Evidence for the binding of Eu(III), Tb(III), and Ce(III) ions and PCR4 in solution was obtained by the lanthanide-...
Fluorescence Enhancement of the Water- Soluble Poly1,4-phenylene-[9,9-bis- (4-p...
Burrows, H. D.; Lobo, V. M. M.; Pina, J.; Ramos, M. L.; Melo, J. Seixas de; Valente, A. J. M.; Tapia, M. J.; Pradhan, S.; Scherf, U.http://dx.doi.org/10.1021/ma048780+
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