TY - JOUR
T1 - A Case of Self-Organization in Highly Emissive EuIII Ionic Liquids
AU - Leal, João P.
AU - Outis, Mani
AU - Casimiro, Maria H.
AU - Ferreira, Luis M.
AU - Fernandes, Fábio
AU - Monteiro, Bernardo
AU - Laia, César A. T.
AU - Pereira, Cláudia C.L.
N1 - We thank the Fundacao para a Ciencia e Tecnologia (FCT) for financial support through the UID/Multi/04349/2013 project and the grants SFRH/BPD/108959/2015 (C. C. L. P.) and SFRH/BPD/47087/2008 (B. M.). The NMR spectrometers are part of The National NMR Facility, supported by the FCT (RECI/BBB-BQB/0230/2012). F. F. acknowledges the FCT for the grant IF/00386/2015. This work was also supported by the Associated Laboratory for Sustainable Chemistry - Clean Processes and Technologies - LAQV, which is financed by national funds from the FCT/MEC (UID/QUI/50006/2013) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007265).
PY - 2017
Y1 - 2017
N2 - Intrinsic photoluminescent ionic liquids based on europium(III) tetrakis(β-diketonate) complexes with a tetraalkylphosphonium as the counterion were synthesized. Two are room temperature ionic liquids; [P6,6,6,14][Eu(fod)4] (1) {fod is 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyloctane-4,6-dionate} and [P6,6,6,14][Eu(fod)3(dbm)] (2) {dbm is dibenzoylmethanate}, while calorimetric measurements showed a melting point at 415 K for [P6,6,6,14][Eu(dbm)4] (3). The luminescence quantum yields determined for 1, 2, and 3 are 34, 59 %, and 64 %, respectively. The photoluminescence and thermochemical properties of the complexes were investigated in detail and the influence of the long chain tetraalkylphosphonium counterion, together with the aromatic diketone ligand, on the unusual thermal behavior of 2 is discussed.
AB - Intrinsic photoluminescent ionic liquids based on europium(III) tetrakis(β-diketonate) complexes with a tetraalkylphosphonium as the counterion were synthesized. Two are room temperature ionic liquids; [P6,6,6,14][Eu(fod)4] (1) {fod is 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyloctane-4,6-dionate} and [P6,6,6,14][Eu(fod)3(dbm)] (2) {dbm is dibenzoylmethanate}, while calorimetric measurements showed a melting point at 415 K for [P6,6,6,14][Eu(dbm)4] (3). The luminescence quantum yields determined for 1, 2, and 3 are 34, 59 %, and 64 %, respectively. The photoluminescence and thermochemical properties of the complexes were investigated in detail and the influence of the long chain tetraalkylphosphonium counterion, together with the aromatic diketone ligand, on the unusual thermal behavior of 2 is discussed.
KW - Europium
KW - Ionic liquids
KW - Photochemistry
KW - Thermochemistry
KW - Trihexyltetradecylphosphonium
UR - http://www.scopus.com/inward/record.url?scp=85026666929&partnerID=8YFLogxK
U2 - 10.1002/ejic.201700649
DO - 10.1002/ejic.201700649
M3 - Article
AN - SCOPUS:85026666929
SN - 1434-1948
VL - 2017
SP - 3429
EP - 3434
JO - European Journal of Inorganic Chemistry
JF - European Journal of Inorganic Chemistry
IS - 28
ER -