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- W1984200147 abstract "Reaction of sulphonated catecholate Na2C6H4S2O8 (Tiron) and terbium perchlorate with a 3:2 mole ratio in hot water resulted in the precipitation of crystalline Tb2(C6H3S2O8)2·5H2O (A) which recrystallized in water-DMF mixed solvent to obtain the title complex Tb2(C6H3S2O8)2·6DMF (B). The X-ray crystal structure determination of B indicates that Tiron and terbium ion form a chain polymer with a 1:1 mole ratio. The unique structural unit is a dimer in which two terbium ions are bridged by one oxygen atom from a deprotonated hydroxyl group of Tiron. The distance between terbium ions is 3.385 Å. The terbium ion is eight-coordinated dodecahedral. The elemental analysis data and thermographic data show that compound B loses one DMF molecule in air to become Tb2(C6H3S2O8)2·5DMF (B′). The fluorescence spectra of A and B′ have been studied. Both A and B′ have the same maximum excitation wavelength (318 nm) at which the emission fluorescence intensity of B′ is 2.5 times that of A at 543 nm. The thermogravimetric analysis and IR spectra of A and B′ have been studied." @default.
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- W1984200147 date "1995-04-01" @default.
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- W1984200147 title "Studies on a new type of terbium complex with sulphonated catecholate. The molecular structure and fluorescene properties or [Tb2(C6H3S2O8)2·6DMF]n" @default.
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- W1984200147 doi "https://doi.org/10.1016/0277-5387(94)00272-g" @default.
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