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- W2022040811 abstract "This work reports the structural and spectroscopy characterization of poly(styrene sulfonate) (PSS) films doped with neodymium (Nd) ions. Nd–PSS films were processed using the acid of poly(styrene sulfonate) – H–PSS and neodymium nitrate – Nd(NO3)3; the maximum incorporation of Nd ions in the polymeric matrix was equal 19.3%. The absorption in the UV–Vis–NIR spectral region presents typical electronic transitions of Nd3+ ions, with well resolved peaks. The infrared spectra present the transition bands of PSS with characteristic line shape broadening, and the presence of vibrational modes of N–O groups in the range of 1400–720 cm−1, prove the permanence of Nd(NO3)x, with x = 1, 2 and/or 3, in the H–PSS matrix. UV–Vis site selective photoluminescence data indicate that the incorporation of Nd3+ introduces a blue shift in PSS emission (325–800 nm), decreasing the interaction between adjacent PSS lateral groups (aromatic rings). Nd3+ reabsorption and energy transfer effects between the PSS matrix and Nd3+ were also observed. The IR emission of Nd–PSS films at 1076 nm (4F3/2 → 4I11/2) present constant efficiency, independent on Nd3+ concentration. The Judd–Ofelt theory was employed to analyze radiative properties. The excitation spectra prove the energy transfer between the polymeric matrix and Nd3+. Complex impedance data was used to probe relaxation processes during the charge transport within the polymeric matrix." @default.
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- W2022040811 date "2008-12-01" @default.
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- W2022040811 title "Structural and spectroscopic characterization of poly(styrene sulfonate) films doped with neodymium ions" @default.
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- W2022040811 doi "https://doi.org/10.1016/j.jnoncrysol.2008.07.032" @default.
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