Paintable Hybrids with Thermally Stable Dual Emission Composed of Tetraphenylethene-Integrated POSS and MEH-PPV for Heat-Resistant White-Light Luminophores

Abstract

Thermally stable dual emission followed by white-light luminescence from hybrid materials is reported. Hybrid films were prepared with a spin-coating method with the mixture solution containing tetraphenylethene (TPE)-integrated polyhedral oligomeric silsesquioxane (POSS) and poly­[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene vinylene] (MEH-PPV). TPE-tethered POSS (TPE-POSS) showed high compatibility with MEH-PPV. Therefore, homogeneous films with variable concentrations of TPE-POSS were obtained. Owing to good dispersion of rigid silica cubes into matrices, POSS-containing films demonstrated high thermal stability toward molecular rearrangement by annealing as well as pyrolysis, similar to conventional polymer hybrids. Furthermore, it was found that TPE-POSS was able to enhance emission efficiencies, probably by suppressing chain aggregation. By modulating introduction ratios of TPE-POSS, dual-emission properties followed by white-light luminescence composed of cyan and orange emissions from TPE-POSS and MEH-PPV, respectively, were accomplished. It should be noted that these color balances can be preserved even in the high-temperature region (425 K). Finally, white-light luminescent materials with thermal durability were obtained.

Design strategies and applications of novel functionalized phenazine derivatives: a review

“…These interesting molecules have been extensively investigated in the fields of sensors, white-light-emitting materials and other multicolor smart materials. 81–90…”

Recent Progress on Designable Hybrids with Stimuli‐Responsive Optical Properties Originating from Molecular Assembly Concerning Polyhedral Oligomeric Silsesquioxane

“…Recent reports show that POSS derivatives with conjugated substituents can exhibit high affinity toward π‐conjugated polymers. As a result, by using these POSS derivatives as a filler, thermally‐stable polymer hybrids with π‐conjugated polymers can be obtained [6e,44f,g] . Furthermore, by modifying polyurethane ends with POSS, thermal stability and dispersibility of π‐conjugated polymer into polyurethane (PU) films can be enhanced without significant losses of elasticity.…”

Highly Sensitive Photopolymer for Holographic Data Storage Containing Methacryl Polyhedral Oligomeric Silsesquioxane

“…As a special family of organic–inorganic hybrid material, , polyhedral oligomeric silsesquioxane (POSS) (RSiO 1.5 ) n has a cage-shaped core, a rigid, three-dimensional structure, and a switchable branch (such as alkyl, aryl, vinyl, acrylate, epoxide, and so on) at each of the Si sites. − A benefit to the organic–inorganic structure, POSS shows a huge potential for polymer performance modification according to the high solubility in most organic solutions. − The POSS-grafting polymers can be prepared by free radical polymerization, ,, and the method has been used to acquire POSS–PMMA using R-POSS with CC bond branches during thermal polymerization with methyl methacrylate (MMA). − The POSS-containing material with star-shaped or network structure in the polymer matrix can dramatically optimize the properties (Scheme ). ,,− Considering our previous report, which shows that photosensitizer PQ can react with the CC bond of MMA more effectively, the Ma-POSS with eight methacryl (Ma) branches was selected to enhance the holographic performance of the PQ/PMMA photopolymer.…”