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Study of ion-ion energy transfer in heteroleptic and heterodinuclear complexes of lanthanide ions as a function of donor-acceptor distance

Grant number: 17/08098-0
Support type:Scholarships in Brazil - Master
Effective date (Start): August 01, 2017
Effective date (End): February 28, 2019
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Fernando Aparecido Sigoli
Grantee:Deborah Asbahr de Lima
Home Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:13/22127-2 - Development of novel materials strategic for integrated analytical devices, AP.TEM

Abstract

The present project aims the synthesis of the complexes [Ln1(hfa)3(tppo)-(¼-L)-Ln2(hfa)3(tppo)], which Ln1 = Tb(III) and Ln2 = Eu(III); hfa = 1,1,1,5,5,5-hexafluoropentane-2,4-dione; tppo = triphenylphosphine oxide; and the bridge ligand L = [(diphenylphosphoryl)R](diphenyl)phosphine oxide (R = methyl, ethyl, propyl or butyl). It will be evaluated the efficiency of the energy transfer/retro-transfer processes between Tb(III) and Eu(III) ions, the emissions intensities and lifetimes according to the distance between the two metallic centers. The complexes will be characterized by NMR, FT-IR, Elemental Analysis, Thermogravimetric Analysis, Complexometric Titration, Raman spectroscopy, Electronic Spectroscopy of UV-VIS, Photoluminescence Spectroscopy, Photochemical Stability, Modeling and Semi-Empirical Calculations for complexes. The complexes may be used for temperature sensing. (AU)