A novel rubber composite of acrylonitrile-butadiene rubber (NBR) filled with gadolinium salt (GS) particles was prepared for the first time and vulcanized via coordination reactions. The resulting materials exhibit good mechanical properties. Structural analyses indicate that the composite is a kind of elastomers based on coordination cross-linking interactions between the nitrile groups (–CN) of NBR and gadolinium ions. The mechanical properties of vulcanized GS/NBR rubber are altered when the cross-link density is changed in the composites. These materials show good irradiation resistance because of the introduction of GS. POLYM. COMPOS., 34:1013–1019, 2013. © 2013 Society of Plastics Engineers

Novel luminescent silicone hybrids (LSHs) containing lanthanide ions were prepared via different sol–gel processes. The precursor, dimethyl ester-functionalized silane, was synthesized via a facile amino-ene reaction. The coordinated assembly of the ester ligands and lanthanide ions (Eu³⁺, Tb³⁺ and Dy³⁺) occurred. The ester ligands were immobilized onto the Si-O network backbone during the preparation of the silicone hybrid materials. The particle size can be controlled to ca 50 nm by adjusting the solvent ratio. The obtained materials were characterized by Fourier transform infrared, ¹H nuclear magnetic resonance spectroscopy (NMR), ¹³C NMR, ²⁸Si NMR, X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetric analysis, high-resolution scanning electronic microscopy and luminescent (excitation and emission) spectroscopy. The coordination state and photophysical performance of the compounds were studied in detail. The terbium- and europium-containing materials show sharp green and red emissions, respectively, which indicate that efficient intramolecular energy transfer took place in these LSHs.