TY - JOUR
T1 - Thermoreversible luminescent organogels doped with Eu(TTA)3phen complex
AU - Di Lorenzo, Maria Laura
AU - Cocca, Mariacristina
AU - Gentile, Gennaro
AU - Avella, Maurizio
AU - Gutierrez, David
AU - Della Pirriera, Monica
AU - Kennedy, Manus
AU - Ahmed, Hind
AU - Doran, John
PY - 2013/5/15
Y1 - 2013/5/15
N2 - This manuscript details the preparation and characterization of luminescent organogels in toluene. Gels were prepared by using 12-hydroxystearic acid (12HSA) as gelator and different amounts of thenoyltrifluoroacetonato 1,10-phenanthroline europium(III) complex (Eu(TTA)3phen). The gelation properties and the thermoreversible behavior from solid-like to liquid systems were investigated by differential scanning calorimetry. At higher concentration, an interaction of Eu complex with the polar group of the gelator was revealed by DSC and FTIR analyses. The spectroscopic behavior of the complex was investigated in toluene solution and in the gel state. TEM analysis revealed that 12HSA is able to solvate the Eu diketonate complex inducing a remarkable increase in the Eu-Eu distance. The Eu(TTA)3phen in the gel state exhibits a very high emission quantum yield, Φ, which was found to be independent of Eu complex concentration, at least for the composition range analyzed. These results indicate that 12HSA organogels containing Eu(TTA)3phen are promising materials for optical applications.
AB - This manuscript details the preparation and characterization of luminescent organogels in toluene. Gels were prepared by using 12-hydroxystearic acid (12HSA) as gelator and different amounts of thenoyltrifluoroacetonato 1,10-phenanthroline europium(III) complex (Eu(TTA)3phen). The gelation properties and the thermoreversible behavior from solid-like to liquid systems were investigated by differential scanning calorimetry. At higher concentration, an interaction of Eu complex with the polar group of the gelator was revealed by DSC and FTIR analyses. The spectroscopic behavior of the complex was investigated in toluene solution and in the gel state. TEM analysis revealed that 12HSA is able to solvate the Eu diketonate complex inducing a remarkable increase in the Eu-Eu distance. The Eu(TTA)3phen in the gel state exhibits a very high emission quantum yield, Φ, which was found to be independent of Eu complex concentration, at least for the composition range analyzed. These results indicate that 12HSA organogels containing Eu(TTA)3phen are promising materials for optical applications.
KW - 12-Hydroxystearic acid
KW - Europium complex
KW - FTIR
KW - Luminescent organogel
KW - Luminescent quantum yield
KW - Morphology
KW - Thermoreversible gel
UR - https://www.scopus.com/pages/publications/84876501254
U2 - 10.1016/j.jcis.2013.02.012
DO - 10.1016/j.jcis.2013.02.012
M3 - Article
AN - SCOPUS:84876501254
SN - 0021-9797
VL - 398
SP - 95
EP - 102
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -