Coordination Assembly and Characterization of Red‐Emitting Europium (III) Organic/Inorganic Polymeric Hybrids

Abstract

Novel luminescent ternary organic-inorganic-polymeric hybrid material has been assembled by Eu(3+) complex incorporating into poly (methyl methacrylate) (PMMA) matrix. The functionalized silylated precursor PDC-Si derived from PDC (2,6-pyridinedicarboxylic acid chloride) behaves as the coordination units of Eu(3+) ion. The organic polymer was introduced into the system by directly dissolving PMMA in solution of Eu(PDC-Si)(3) complex and N-N-Dimethyl Formamide (DMF) with subsequent addition of tetraethoxysilane to promote hydrolysis and condensation. The structure and photophysical properties of the resulting hybrids are characterized by Fourier transform infrared spectra, X-ray diffraction (XRD), scanning electronic microscopy and photoluminescence spectra. The luminescence quantum yield was calculated based on the emission spectra and luminescence lifetimes. XRD reveals its amorphous structure. Efficient energy transfer process occurs between PMMA and Eu(3+), and replacement of water molecule by PMMA in the first coordination sphere was confirmed by comparing with the binary hybrid.

Influence of Baking and Acid Cleaning on the Morphology and Composition of Diatom Biosilica

“…3a and 3b. The intense bands located at 470, 810 and 1090 cm -1 are due to the bending vibration, and the symmetric and asymmetric stretching vibration of Si-O-Si network of the biosilica [23], while the shoulder in the 1100-1200 cm -1 region is related to the out-of-phase Si-O stretching vibrations [25]. Another similarities are the broad band observed around 3435 cm -1 and the weak band located at 1640 cm -1 , they are ascribed to the O-H stretching and bending vibration of hydroxyl groups of surface-bound water and water adsorbed in the porous structures [19,24], which also includes the H-O-Si configuration [13].…”

Synthesis and Characterization of Luminescence Eu³⁺/Polyurethane Composite Material

“…[6] Among various organic ligands, organic ligands with carbonyl has been as good candidates for chelates and sensitization of rare earth ions because it has strong absorption ability of UV-visible light in wide range for its π-π* transition and transfer the light to central rare earth ions efficiently. [7] In this paper, we report on the lanthanide ion Eu 3+ coordinated with the organic ligand 2,6-pyridinedicarboxamide through react with the organic polymeric chains (CONH) using the phenyl isocyanate (MDI) and 1, 4-butanediol as the chain extender simultaneously. For demonstrate the luminescence properties and the thermal stability, the ternary hybrid Eu(PDCA-PU) 3 phen were measured in detail.…”

Photophysical Properties of Sol–gel derived Luminescent Silicone Hybrids Synthesized via Facile Amino‐Ene Reaction

“…Siloxane lanthanide is a key ligand to obtain novel functional hybrid materials. Various siloxane precursors have been prepared via modification reactions, such as amino‐ (25,26), carboxylic‐ (27–29), sulfide‐modification (30,31) and other reactions (32–34). However, the siloxane lanthanide ligands available are still limited.…”