TY - JOUR
T1 - Luminescence enhancement of the Tb(III) ion with the thenoyltrifluoroacetonate ligand acting as an efficient sensitizer
AU - Teotonio, Ercules E. S.
AU - Silva, Francisco A.
AU - Pereira, Dariston K. S.
AU - Santo, Lidiaine M.
AU - Brito, Hermi F.
AU - Faustino, Wagner M.
AU - Felinto, Maria Claudia F. C.
AU - Santos, Regina Helena
AU - Moreno-Fuquen, Rodolfo
AU - Kennedy, Alan R.
AU - Gilmore, Denise
PY - 2010/12
Y1 - 2010/12
N2 - The synthesis, structural investigation, and photophysical properties of the complex [Tb(TTA)(2)(NO3) (TPPO)(2)] are reported. Unlike the analog tris-diketonate complex [Tb(TTA)(3)(TPPO)(2)], the new complex presents abnormally high luminescence intensity centered on the terbium ion. Our results clearly suggest a higher energy transfer efficiency from the TEA antenna ligand to the Tb(III) ion in the bis-diketonate complex compared with that in the tris-diketonate complex. A mechanism involving the increasing of triplet state energy when one TTA ligand is replaced by the NO3- group in the first coordination sphere is suggested and experimentally investigated to explain the anomalous luminescence properties of the new complex [Tb(TTA)(2)(NO3)(TPPO)(2)].
AB - The synthesis, structural investigation, and photophysical properties of the complex [Tb(TTA)(2)(NO3) (TPPO)(2)] are reported. Unlike the analog tris-diketonate complex [Tb(TTA)(3)(TPPO)(2)], the new complex presents abnormally high luminescence intensity centered on the terbium ion. Our results clearly suggest a higher energy transfer efficiency from the TEA antenna ligand to the Tb(III) ion in the bis-diketonate complex compared with that in the tris-diketonate complex. A mechanism involving the increasing of triplet state energy when one TTA ligand is replaced by the NO3- group in the first coordination sphere is suggested and experimentally investigated to explain the anomalous luminescence properties of the new complex [Tb(TTA)(2)(NO3)(TPPO)(2)].
KW - terbium
KW - luminescence
KW - thenoyltrifluoroacetonate
KW - sensitizer
KW - energy transfer
KW - intramolecular energy-transfer
KW - complexes
KW - photoluminescent
KW - excitation
KW - spectra
UR - http://www.scopus.com/inward/record.url?scp=78649324701&partnerID=8YFLogxK
U2 - 10.1016/j.inoche.2010.07.043
DO - 10.1016/j.inoche.2010.07.043
M3 - Article
VL - 13
SP - 1391
EP - 1395
JO - Inorganic Chemistry Communications
JF - Inorganic Chemistry Communications
SN - 1387-7003
IS - 12
ER -