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- W1968405756 abstract "The first luminescent linear europium(III) Schiff-base polyelectrolytes with europium in the polymer backbone have been synthesized and characterized. Europium-containing polyelectrolytes with ligand triplet states at or above the 5D0 state of europium luminesce with high quantum yields, consistent with the intramolecular energy-transfer mechanism established for europium(III) complexes. New [NaY(tstm)]n polyelectrolytes, where tstm4- is the anionic ligand derived from N,N‘,N‘‘,N‘‘‘-tetrasalicylidene-3,4,3‘,4‘-tetraaminodiphenylmethane, were synthesized with n values (up to 21 600) based on NMR end-group analysis. Intrinsic viscosities provide Mark−Houwink constants of a = 0.52 and K = 0.066 cm3/g for [NaY(tstm)]n. Mixed-metal [NaYxEu1-x(tstm)]n polyelectrolytes provide enhanced emission over [NaEu(tstm)]n. The intensity is most enhanced for polyelectrolytes with Y:Eu ratios between 1:2.5 and 1:9, probably by intrachain energy transfer from the yttrium units of the polyelectrolytes to the EuIII ions. [NaY0.2Eu0.8(tstm)]n (Y:Eu = 1:4) luminesces more strongly than any other compound investigated and has a quantum yield of 0.74 at 77 K." @default.
- W1968405756 created "2016-06-24" @default.
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- W1968405756 date "1996-01-01" @default.
- W1968405756 modified "2023-10-16" @default.
- W1968405756 title "Synthesis and Characterization of Linear Luminescent Schiff-Base Polyelectrolytes with Europium(III) in the Backbone<sup>1a</sup>" @default.
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- W1968405756 doi "https://doi.org/10.1021/ma951470u" @default.
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