Project/scholarship details
- Project/scholarship ID
66250
- Reference
PTDC/QUI/66250/2006
- FundRef URI
- Funder
FCT - Fundação para a Ciência e a Tecnologia, I.P.
- Funder's country
Portugal
- Funding program
5876-PPCDTI
- Funding amount
110,100.00 €
- Start date
2008-01-01
- End date
2011-06-30
Documents
Synthesis, characterization and metal ion detection of novel fluoroionophores b...
Costa, Susana P. G.; Oliveira, Elisabete; Lodeiro, Carlos; Raposo, M. Manuela M.The synthesis of new fluorescent probes containing the thiophene and benzoxazole moieties combined with an alanine residue is described. The resulting highly fluorescent heterocyclic alanine derivatives respond via a quenching effect, with paramagnetic Cu(II) and Ni(II) metal ions and with diamagnetic Hg(II), as shown by the absorption and steady-state fluorescence spectroscopy studies. The formation of mononuc...
New oligothienyl-imidazo-phenanthroline chromophores for NLO applications
Batista, Rosa Maria Ferreira; Costa, Susana P. G.; Lodeiro, Carlos; Belsley, M.; Gomes, E. Matos; Raposo, M. Manuela M.A new series of oligothienyl-imidazo-phenanthrolines 3 were synthesised in good to excellent yields by condensation of 5,6-phenantroline-dione 2 with formyl-thiophene derivatives 1 in the presence of ammonium acetate in glacial acetic acid. Furthermore, their solvatochromism and molecular optical nonlinearities were determined and comparatively studied. The experimental results indicate that phenanthrolines 3, ...
Heteroaromatic alanine derivatives bearing (oligo)thiophene units : synthesis a...
Costa, Susana P. G.; Oliveira, M. Elisabete; Lodeiro, Carlos; Raposo, M. Manuela M.A series of new benzoxazolylalanine derivatives bearing (oligo)thiophene units at the side chain were synthesized in good yields. The photophysical characterization of these amino acids was performed by UV-vis absorption and fluorescence emission studies and revealed that some of the compounds display high fluorescent quantum yields, making them good candidates for application as fluorescent probes.; Fundação p...
Synthesis and evaluation of bipendant-armed (oligo)thiophene crown ether deriva...
Batista, Rosa Maria Ferreira; Oliveira, M. Elisabete; Costa, Susana P. G.; Lodeiro, Carlos; Raposo, M. Manuela M.Three new (oligo)thiophene bipendant-armed ligands 2a-c, derived from 2-(aminomethyl)-15-crown-5, have been synthesized and characterized. Compounds 2a-c were prepared by reductive amination of the corresponding macrocycle with formyl thiophene derivatives 1a-c in the presence of NaBH(OAc)3 in fair to good yields. The photophysical properties of ligands 2a-c were studied and they were also evaluated as chemosen...
Synthesis and characterization of novel (oligo)thienyl-imidazo-phenanthrolines ...
Batista, Rosa Maria Ferreira; Costa, Susana P. G.; Belsley, M.; Lodeiro, Carlos; Raposo, M. Manuela M.A series of new heterocyclic chromophores 3-6 were synthesised in moderate to excellent yields by condensation of 5,6-phenantroline-dione with formyl-thiophene derivatives 1-2 in the presence of ammonium acetate in glacial acetic acid. These chromophores possess a (oligo)thienyl- π-conjugated system attached to an imidazophenanthroline moiety. These derivatives were evaluated concerning their solvatochromic pro...
Unnatural benz-X-azolyl asparagine derivatives as novel fluorescent amino acids...
Esteves, Cátia I. C.; Silva, Ana M. F.; Raposo, M. Manuela M.; Costa, Susana P. G.A family of new asparagine derivatives bearing benzothiazole and benzimidazole units, functionalised with electron donor or acceptor groups, were synthesized in good to excellent yields. The photophysical characterization of these new heterocyclic amino acids was performed by UV-visible absorption and fluorescence emission studies and revealed that the compounds displayed remarkably high fluorescence quantum yi...
Synthesis and evaluation of new thienyl and bithienyl-bis-indolylmethanes as co...
Batista, Rosa Maria Ferreira; Oliveira, M. Elisabete; Nuñez, Cristina; Costa, Susana P. G.; Lodeiro, Carlos; Raposo, M. Manuela M.The synthesis and full characterization of new bis-indolylmethanes containing thienyl and bithienyl moieties are reported. The sensor ability of the compounds in the presence of halide ions (F-, Cl-, Br- and I-), NO3-, ClO4-, SO42-, CN- and OH- ions was investigated in acetonitrile. The experimental results indicate that they could act as selective chromogenic-sensing molecules for the most basic anions F-, CN-...
Synthesis and evaluation of the optical properties of novel thermally stable ph...
Batista, Rosa Maria Ferreira; Costa, Susana P. G.; Belsley, M.; Raposo, M. Manuela M.Six new hyperpolarizable chromophores 3-4 based on functionalized arylthiophene donors and an imidazo-phenanthroline acceptor moiety have been designed and synthesized for the first time in good to excellent yields by condensation of 5,6-phenantroline-dione 2 with formyl-arylthiophene derivatives 1 in the presence of ammonium acetate in glacial acetic acid. The thermal stability, solvatochromic and nonlinear op...
Exploring the emissive properties of new azacrown compounds bearing aryl, furyl...
Oliveira, Elisabete; Baptista, Rosa M. F.; Costa, Susana P. G.; Raposo, M. Manuela M.; Lodeiro, CarlosThree new compounds bearing furyl, aryl or thienyl moieties linked to an imidazo-crown ether system (1, 2 and 3) were synthesized and fully characterized by elemental analysis, infrared, absorption and emission spectroscopy, X-ray crystal diffraction, and MALDI-TOF-MS spectrometry. The interaction towards metal ions (Ca2+, Cu2+, Ni2+ and Hg2+) and F- has been explored in solution by absorption and fluorescence ...
Synthesis and characterization of the ground and excited states of tripodal-lik...
Pina, João; Melo, J. Sérgio Seixas de; Batista, Rosa Maria Ferreira; Costa, Susana P. G.; Raposo, M. Manuela M.Six new thiophene oligomers, here designated as tripodal-like oligothienyl imidazoles, were synthesized and have been investigated in ethanol solution at room and low temperature. The oligomers bear a common core where two or more thiophenes are linked to one or more imidazole unit which further links through its alpha position to a different number of incremental thiophene units. The study involves a comprehen...
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