TY - JOUR
T1 - A dinuclear europium(III) complex with thenoyltrifluoroacetonato and 1-(2-pyridylzao)-2-naphtholato ligands and its optical properties
AU - Wu, Yinglan
AU - Wang, Jiafu
AU - Kong, Xiangjian
AU - Sheng, Chuanxiang
AU - Wang, Ruiyao
AU - Peyghambarian, Nasser
AU - Norwood, Robert A.
AU - Zheng, Zhiping
N1 - Funding Information:
This work was supported by the US NSF (CHE-0238790). Portions of this work were additionally supported by the US Army Research Office MURI through the University of Central Florida under contract/grant 50372-CH-MU .
PY - 2011/5/15
Y1 - 2011/5/15
N2 - Dinuclear lanthanide complexes of the general for Ln2(TTA) 4(PAN)2 (Ln = Eu, Gd, Tb, Yb; TTA and monodeprotonated thenoyltrifluoroacetone and PAN 1-(2-pyridylazo)-2-naphthol, respectively) were prepared and structurally characterized. These novel complexes, representing the first examples of crystallographically characterized lanthanide-PAN complexes, each feature a dinuclear core with the metal atoms bridged by the phenolato O atoms of the chelating-bridging PAN ligands. Electronic spectroscopic and photoluminescence studies were carried out for the Eu(III) complex, and the results are consistent with ligand-mediated energy transfer and ligand-sensitized luminescence characteristic of Eu(III). The Eu(III) complex doped into a polymeric film was shown to effectively limit a nanosecond 523-nm laser pulse, and the limiting effect is rationalized in terms of reverse saturable absorption due to the strong absorption of the metal's excited triplet states that are populated by intersystem crossing.
AB - Dinuclear lanthanide complexes of the general for Ln2(TTA) 4(PAN)2 (Ln = Eu, Gd, Tb, Yb; TTA and monodeprotonated thenoyltrifluoroacetone and PAN 1-(2-pyridylazo)-2-naphthol, respectively) were prepared and structurally characterized. These novel complexes, representing the first examples of crystallographically characterized lanthanide-PAN complexes, each feature a dinuclear core with the metal atoms bridged by the phenolato O atoms of the chelating-bridging PAN ligands. Electronic spectroscopic and photoluminescence studies were carried out for the Eu(III) complex, and the results are consistent with ligand-mediated energy transfer and ligand-sensitized luminescence characteristic of Eu(III). The Eu(III) complex doped into a polymeric film was shown to effectively limit a nanosecond 523-nm laser pulse, and the limiting effect is rationalized in terms of reverse saturable absorption due to the strong absorption of the metal's excited triplet states that are populated by intersystem crossing.
KW - 1-(2-Pyridylazo)-2-naphthol
KW - Crystal structure
KW - Europium complex
KW - Ligand-sensitized luminescence
KW - Optical limiting
KW - Reverse saturable absorption
UR - http://www.scopus.com/inward/record.url?scp=79954579271&partnerID=8YFLogxK
U2 - 10.1016/j.ica.2011.01.096
DO - 10.1016/j.ica.2011.01.096
M3 - Article
AN - SCOPUS:79954579271
SN - 0020-1693
VL - 370
SP - 346
EP - 352
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 1
ER -