Energy transfer along a sequence controlled hybrid polymer

Abstract

The present work provides an ideal model for intra‐chain energy transfer study in conjugated polymer through shielding the polymer backbone by using bulky polyhedral oligomeric silsesquioxanes (POSS). POSS provides a circumference shielding of the polymer backbone to prevent closed packing of the polymer chains, allowing the intra‐chain energy transfer dominating in large concentration range. Bi‐functional POSS (B‐POSS) is specially designed to separate donor (fluorene) and acceptor (benzothiadiazole) within the polymer chain. The dynamics of energy transfer in poly(fluorene‐POSS‐alt‐POSS‐benzothiodiazole) (PTBtTbOFl3) is studied by steady state as well as time resolved fluorescence spectroscopy at different donor/acceptor ratios. Results reveal that POSS can effectively shield inter‐chains energy transfer of the polymers, suggesting it is an effective model for energy transfer study with less inter‐chains effects. PTBtTbOFl3 works as a chemosensors is also reported in the detection of explosive derivatives. These results provide insights for optimizing nanostructured materials for use in optoelectronic devices. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1225–1233

Mechanically Robust Hybrid POSS Thermoplastic Polyurethanes with Enhanced Surface Hydrophobicity

“…The addition of POSS was reported to have significant effect in retarding the random breakage of the polymer backbone as well [ 38 ]. Comparison of the length of PCL in the hybrids with similar ratio of B-POSS indicated that PCL may also help to enhance thermal stability of the PUs because T d also depends on the molecular weight (M n ) of the polymer drastically [ 36 ], and the long-chain oligomers with POSS could enhances the thermal stability of the polyurethane by better dispersion [ 25 , 26 , 27 , 29 ]. The copolymer and neat PU exhibited similar TGA profiles, indicating that the incorporation of B-POSS had no significant effect on the degradation mechanism of the PUs backbone.…”

“…The second merit is the biocompatibility and non-toxicity of POSSs [21,22,23,24]. Moreover, according to our previous results, not only could POSS enhance thermal stability [25,26], but it could also strengthen the mechanical properties [27] and retain the optical stability of the materials [28,29] due to its special composition and cage-liked nanostructure. In addition, POSS can be introduced into a polymer matrix by using covalently bonding as a pendent side group [30,31,32,33] or as end groups [34,35].…”

Progress in the Synthesis of Bifunctionalized Polyhedral Oligomeric Silsesquioxane

“…To synthesize high-performance polymers, POSSs are often functionalized with aromatic groups [81][82][83][84]. Seino et al [69] reported that the reaction between B-POSS and diynes resulted in the formation of linear polymers via hydrosilylation polymerization.…”

Facile and Eco‐Friendly Fabrication of Multifunctional Melamine Sponge for Labeled Cr(VI) Removal and Highly Efficient Oil/Water Separation

“…[23][24][25] The produced silicones can be used to modulate the mechanical performance while maintaining or optimizing the optical properties of polymers. [26,27] Additionally, primary amino groups are widely used to enhance the affinity of materials to heavy metals [28,29] because of the strong coordination and electron-donating interaction between them. [30,31] Therefore, polyaminosiloxane (PAS) was designed and grafted onto the sponge through a nucleophilic reaction between the amine and glutaraldehyde (GLA).…”