Synthesis, Morphology, and Luminescence Properties of Poly(urethane-acrylate) Nanowires Bonding with the Eu(III) Complex

Abstract

Photoluminescent poly(urethane-acrylate) (PUA) nanowires are designed and synthesized through copolymerization of a presynthesized-europium (Eu) complex with active vinyl groups and a vinyl functionalized PUA macromonomer matrix, initiated by azobisisobutyronitrile. This procedure provides a method to prepare PUA-Eu nanowires through in situ polymerization. Based on this, a series of PUA-Eu nanowires with diameters of 80–300 nm are successfully obtained in templates of anodized aluminum oxide by in situ polymerization. The obtained PUA-Eu nanowires display different morphologies such as sharp, round, and flat head by controlling the casting conditions. Furthermore, the PUA-Eu nanowires exhibit unique luminescence properties provided through Eu(III) elements, and the luminescence intensity significantly enhances with the increase in Eu complex concentration. PUA-Eu nanowires have longer fluorescence lifetimes than that of Eu complexes and PUA-Eu plates.

Optimizing the Superhydrophobicity of the Composite PDMS/PUA Film Produced by a R2R System

“…Figure f demonstrates FTIR spectra of the pure or PDMS-free PUA and FTPPS films. The FTIR spectrum of the pristine PUA sample [Figure f­(i)] exhibits fundamental vibrational peaks at ∼1084.6, ∼1236, and ∼1711 cm –1 , which can be assigned to the C–C stretching, amide IIINH and CH, and ester carbonyl CO stretching vibrations, respectively. ,− Meanwhile, the FTIR spectrum of the FTPPS film [Figure e­(ii)] shows two major peaks at 788 and 1011 cm –1 , which are attributed to CH 3 rocking in Si–(CH 3 ) 2 and Si–O–Si stretching, respectively. In addition, the symmetric stretching and the deformation vibrations of the methyl groupsCH 3 can be found at 1257 and 2961 cm –1 . , These mentioned Raman and FTIR analysis results further validate the successful coating of PDMS on PUA micro-posts by capillary rising.…”