Photoactive Ternary Rare Earth Complex Hybrids with Sulfoxide Functionalized Silica and PMMA (or Phen)

Abstract

A series of ternary rare earth complexes were covalent grafted to the inorganic Si-O networks through the novel bifunctional silylated monomer BBMSSi (BBMS = Bis [benzoylmethyl] sulfoxide). FT-IR, NMR, XRD, TGA, SEM, DRS and photoluminescence properties were used to characterize the obtained hybrid materials. Scanning electron micrograph results revealed hybrids exhibiting homogeneous morphology with large particle size of 100-200 microm and no phase separation. Photoluminescence measurements indicated hybrids with characteristic red and green luminescence. In addition, the existence of the polymeric chain PMMA and 1,10-phenanthroline in different hybrid systems present different microstructure and luminescence behavior.

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

“…The residual of the 62% weight was mainly inorganic Si‐O silica network, which can be evidenced by the IR spectra of the residual (here the spectrum was not given). Generally, both the starting decomposition temperature and the residual weight prove that the stability of the polymeric hybrid is much higher than pure complex in previous studies (29,33).…”

“…The ν(C=O) vibration shifts to lower frequencies after complexation comparing the spectra of silylated precursor PDC‐Si with that of two hybrids (from 1663 cm −1 to 1639 and 1647 cm −1 respectively) (32). The ν(Si‐C) vibration located at 1187 cm −1 indicates that no great Si‐C bond cleavage occured during the sol‐gel process (33). The broad band around 3424 cm −1 belongs to the OH vibration of water molecule in the materials, and the relatively weak peaks around 2939 cm −1 are attributed to the vibration of methylene groups.…”

“…By comparison with the binary hybrid Eu‐PDC‐Si, there is no new diffraction peaks in ternary Eu‐PDC‐Si‐PMMA hybrid with PMMA, which indicates that macromolecule ligand brings no change in the disordered structure. Thus, determining the accurate structure of these kinds of hybrids remains a challenge until now, as they belong to a complicated huge molecular network (33).…”

A study of erbium–ytterbium‐codoped polymer waveguide amplifier

“…They can be used to compensate various losses at the optical telecommunication windows because of their near‐infrared emissions. Polymer materials [8–10] are promising candidates as hosts of rare earth ions because of their ease of fabrication, compatibility with other materials, and low optical loss in the near‐infrared wavelength range. However, the bottlenecks are the insolubility of rare earth ions in polymers and the luminescent quenching from CH and OH bonds in polymer.…”