de Bettencourt-Dias, Ana - University of Nevada-Reno

个人简介

Licenciatura (1993), University of Lisbon, Portugal Dr. rer. nat. (1997), magna cum laude, University of Cologne, Germany (Thomas Kruck) Gulbenkian Postdoctoral Fellow (1998-2001), University of California, Davis (Alan L. Balch)

研究领域

The luminescence of lanthanide ions has applications from display applications to bioimaging and sensing. The emission of light by these ions arises from f-f transitions, which are forbidden by selection rules. To achieve efficient light emission ligands are utilized, which absorb energy and transfer this energy through a sequence of steps to the coordinated lanthanide ion. Our group is interested in developing new ligands for highly emissive lanthanide ion complexes. We synthesize the ligands and the metal complexes and then characterize with different spectroscopic methods, such as single crystal X-ray diffraction, and absorption, excitation and emission spectroscopy. The ligands targeted in our group are organic or transition metal complexes. Emission is pursued for several different lanthanide ions, with emission in the visible or the near-infrared region of the electromagnetic spectrum. Students in our group learn the principles of organic synthesis and molecular design, as well as the synthesis of metal complexes and isolation of X-ray quality single crystals. Further, they have the opportunity to learn X-ray single crystal diffraction, as well as vibrational, absorption, excitation, emission and NMR spectroscopy.

近期论文

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de Bettencourt-Dias, A., Viswanathan, S., Rollett, A. Thiophene-derivatized Pybox and its highly luminescent lanthanide ion complexes. J. Am. Chem. Soc. 2007, 129, 15436-15437. [abstract] de Bettencourt-Dias, A. Lanthanide-based emitting materials in light-emitting diodes. Dalton Trans. 2007, 2229-2241. [abstract] de Lill, D.T., de Bettencourt-Dias, A., Cahill, C.L. Exploring Lanthanide Luminescence in Metal-Organic Frameworks: Synthesis, Structure and Guest Sensitized Luminescence of a Mixed Europium/Terbium-Adipate Framework and a Terbium-Adipate Framework. Inorg. Chem. 2007, 46, 3960-3965. [abstract] de Bettencourt-Dias, A. Small Molecule Luminescent Lanthanide Ion Complexes – Photophysical Characterization and Recent Developments. Curr. Org. Chem. 2007, 11(16), 1460-1480. [abstract] de Bettencourt-Dias, A. Poloukhtine, 'Phenylthiophene-dipicolinic acid-based with strong solution blue and solid state green emission', J. Phys. Chem. B 2006, 110(51), 25638-25645. [abstract] Viswanathan, S.; de Bettencourt-Dias, A. 'Eu(III) and Tb(III) Luminescence Sensitized by Thiophenyl-Derivatized Nitrobenzoato Antennas', Inorg. Chem. 2006. [abstract] de Bettencourt-Dias, A.; Viswanathan, S. Nitro-functionalization and quantum yield of Eu(III) and Tb(III) benzoic acid complexes. Dalton Trans. 2006, 4093-4103. [abstract] Viswanathan, S.; de Bettencourt-Dias, A. 2-Chloro-5-nitrobenzoato complexes of Eu(III) and Tb(III) - A 1 D coordination polymer and enhanced solution luminescence. Inorg. Chem. Comm. 2006, 9, 444-448. [abstract] de Bettencourt-Dias, A.; Viswanathan, S.; Ruddy, K. Intermolecular forces and functional group effects in the packing structure of thiophene derivatives. Cryst. Growth Des. 2005, 5(4), 1477-1483. [abstract] de Bettencourt-Dias, A. New isophthalato-based 2D coordination polymers of Eu(III), Gd(III) and Tb(III) - Enhancement of the terbium-centered luminescence through thiophene derivatization. Inorg. Chem. 2005, 44, 2734-2741. [abstract] de Bettencourt-Dias, A.; Viswanathan, S. Luminescent Ln3+ nitrobenzoato complexes: first examples of sensitization of green and red emission. Chem. Commun. 2004, 8, 1024-1025. [abstract] Plonska, M. E.; de Bettencourt-Dias, A.; Balch, A. L.; Winkler, K. Electropolymerization of 2'-Ferrocenylpyrrolidino[3',4';1,2][C60]fullerene in the Presence of Palladium Acetate. Formation of an Electroactive Fullerene-Based Film with a Covalently Attached Redox Probe. Chem. Mater. 2003, 15(21) , 4122-4131. [abstract] Olmstead, M. M.; de Bettencourt-Dias, A.; Lee, H.- M.; Pham, D.; Balch, A. L. Interactions of metalloporphyrins as donors with the electron acceptors C60, tetracyanoquinomethane (TCNQ) and trinitrofluorenylidenemalonitrile. Dalton Trans. 2003, 16 , 3227-3232. [abstract] de Bettencourt-Dias, A.; Winkler, K.; Fawcett, W. R.; Balch, A. L. The influence of electroactive solutes on the properties of electrochemically formed fullerene C60-based films. J. Electroanal. Chem. 2003, 549, 109-117. [abstract] Winkler, K.; Noworyta, K.; de Bettencourt-Dias, A.; Sobczak, J. W.; Wu, C.-T.; Chen, L.-C.; Kutner, W.; Balch, A. L. Structure and properties of C60-Pd films formed by electroreduction of C60 and palladium(II) acetate trimer: evidence for the presence of palladium nanoparticles. J. Mater. Chem. 2003, 13(3), 518-525. [abstract]