In this Communication, novel water-soluble hyperbranched polysiloxanes (WHPSs) simultaneously containing hydroxyl and primary amine groups are developed. The polymers are constructed via melt polycondensation, that is, transesterification reaction between ethoxyl groups of (3-aminopropyl)triethoxysilane and hydroxyl groups of dihydric alcohols, using a one-step process under catalyst-free conditions. Surprisingly, the resultant WHPSs can emit bright blue fluorescence in the 100% solid state under the irradiation of UV light, and their photoluminescence intensities in aqueous solutions continuously go up along with increasing concentrations. Interestingly, their hydrolyzates display more intense luminescence compared to the unhydrolyzed. The efficient and easily controllable preparation strategy provides a remarkable and versatile platform for the fabrication of neoteric fluorescent materials for various potential applications.
Frontispiece: Two blue fluorescence‐emitting hyperbranched polysiloxanes are developed. The –OH rather than –NH2 group of the polymers plays a key role in forming the luminescent centers. The emissive intensity of the one carrying the NPG moiety is stronger than that of the other bearing the MPD moiety. Interestingly, the photoluminescent intensities of the hydrolyzed polymers are enhanced compared to the unhydrolyzed ones. Further details can be found in the article by S. Niu, H. Yan,* Z. Chen, L. Yuan, T. Liu and C. Liu on page 136.
Functionalized graphene oxide with a hyperbranched POSS polymer was designed and synthesized and then compounded with dicyclopentadiene bisphenol dicyanate ester to prepare nanocomposites.
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