title: Effective photosensitized energy transfer of nonanuclear terbium clusters using methyl salicylate derivatives.
abstract: The photophysical properties of the novel nonanuclear Tb(III) clusters Tb-L1 and Tb-L2 involving the ligands methyl 4-methylsalicylate (L1) and methyl 5-methylsalicylate (L2) are reported. The position of the methyl group has an effect on their photophysical properties. The prepared nonanuclear Tb(III) clusters were identified by fast atom bombardment mass spectrometry and powder X-ray diffraction. Characteristic photophysical properties, including photoluminescence spectra, emission lifetimes, and emission quantum yields, were determined. The emission quantum yield of Tb-L1 (Φ(ππ*) = 31%) was found to be 13 times larger than that of Tb-L2 (Φ(ππ*) = 2.4%). The photophysical characterization and DFT calculations reveal the effect of the methyl group on the electronic structure of methylsalicylate ligand. In this study, the photophysical properties of the nonanuclear Tb(III) clusters are discussed in relation to the methyl group on the aromatic ring of the methylsalicylate ligand.
authors: Faculty of Engineering, Hokkaido University , N13 W8 Kita-ku, Sapporo, Hokkaido 060-8628, Japan.
authors: Shun
authors: S
authors: Omagari
authors: Takayuki
authors: T
authors: Nakanishi
authors: Tomohiro
authors: T
authors: Seki
authors: Yuichi
authors: Y
authors: Kitagawa
authors: Yumie
authors: Y
authors: Takahata
authors: Koji
authors: K
authors: Fushimi
authors: Hajime
authors: H
authors: Ito
authors: Yasuchika
authors: Y
authors: Hasegawa