Local structure and near-infrared emission features of neodymium-based amine functionalized organic/inorganic hybrids

Article Abstract:

The sol-gel derived di-urea and di-urethane cross-linked poly(oxyethylene)/ siloxane hybrids (di-ureasils and di-urethanesils, respectively) doped with neodymium triflate (Nd(CF(sub 3)SO(sub 3)(sub 3) were examined. The conclusion derived from the study is that hydrogen-bonded associations formed throughout the materials play a major role in the hybrids nanostructure and photoluminescence properties.

Author: Bermudez, V. de Zea, Carlos, L.D., Dahmouche, K., Ferreira, R.A. Sa, Santilli, C.V., Ostrovskii, D., Goncalves, M.C., Silva, N.J.O, Vilela, I.C. Correia, Craievich, A.F.
Neodymium & Compounds, Near infrared spectroscopy, Siloxanes, Amines, Neodymium

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Coordination of Eu(super 3+) ions in siliceous nanohybrids containing short polyether chains and bridging urea cross-links

Article Abstract:

The local environment of the Eu(super 3+) ions in luminescent sol-gel derived materials di-ureasils is investigated with the use of infrared and photoluminescence spectroscopies. The results showed that the coordination of the cations in the di-ureasils depends both on the guest salt concntration and on the length of the polymer chains incorporated.

Author: Bermudez, V. de Zea, Sa Ferriera, R.A., Carlos, L.D., Molina, C., Dahmouche, K., Ribeiro, S.J.L.
Optical properties, Infrared spectroscopy, Chemical synthesis

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Eu(super 3+) coordination in an organic/inorganic hybrid matrix with methyl end-capped short polyether chains

Article Abstract:

The anionic and cationic local environments in mono-urethanesils doped with europium triflate (Eu(CF3SO3)3) are examined. It was carried out with the help of Fourier Transform mid-infrared (FT-IR), Fourier Transform Raman (FT-Raman) and photoluminescence spectroscopies and Two-Dimensional (2D) Correlation Spectroscopic Analysis.

Author: Bermudez, V. de Zea, Carlos, L.D., Ferreira, R.A. Sa, Ostrovskii, D., Goncalves, M.C., Lavoryk, S.
Analysis, Spectra, Fourier transform infrared spectroscopy, Photoluminescence, Properties

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Subjects list: Usage, Chemical properties, Research, Europium
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