Aromatic-ring-layered polymers composed of fluorene and xanthene

Fernandes, Jonas Alves; Morisaki, Yasuhiro; Chujo, Yoshiki

doi:10.1038/pj.2011.58

Cited by 9 publications

(2 citation statements)

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“… 8 − 14 In addition, xanthene fragments have been used as an essential constituent in polymers chains. 15 − 20 Xanthene fragments are critical components for constructing polymer layered p-electron systems, 16 − 18 as well as polymers for gas separations or sorption, and membranes. 19 , 21 , 22 Among those, fluorine-containing xanthenes can be used to prepare high-performance heteroaromatic polymers, such as polyimides, 23 polyarylethers, and polybenzoxazoles.…”

Section: Introductionmentioning

confidence: 99%

“…Xanthene-containing molecules have been widely studied due to their numerous applications that take advantage of their biological and pharmacological properties. − They have also attracted interest due to their interesting photophysical properties, as some derivatives can be used as pigments, dyes, and biological sensors. − In addition, xanthene fragments have been used as an essential constituent in polymers chains. − Xanthene fragments are critical components for constructing polymer layered p-electron systems, − as well as polymers for gas separations or sorption, and membranes. ,, Among those, fluorine-containing xanthenes can be used to prepare high-performance heteroaromatic polymers, such as polyimides, polyarylethers, and polybenzoxazoles . Particularly, the introduction of −CF 3 groups in the structure has been one of the most widely used strategies to obtain solution-processable polymers, a highly desired property that enables attractive applications. , …”

Section: Introductionmentioning

confidence: 99%

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9-Trifluoromethylxanthenediols: Synthesis and Supramolecular Motifs

et al. 2022

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The synthesis of four derivatives and the single-crystal X-ray structures of six 9-trifluoromethylxanthenediols (TFXdiols) I – VI are analyzed in this work. These compounds were obtained through superacid-catalyzed condensation of dihydroxybenzenes with 1,1,1-trifluoroacetone or 2,2,2-trifluoroacetophenone. The title molecules have a convex molecular structure due to their three fused rings of the xanthene moiety. We have found that, similar to resorcinol, the configuration of the hydroxyl groups is of great relevance for the crystal packing favoring either interactions above and below their molecular plane or lateral interactions that create layers. Considering that reports of TFXdiols are very scarce, our findings contribute to a better understanding of the molecular conformation and intermolecular interactions in their crystal structures. A similar analysis was extended to a fortuitous cocrystal obtained between 9-trifluoromethyl-9-(4′-fluorophenyl)-xanthenediol and 1,4-dihydroxybenzene, showing that these structures might be used to obtain cocrystals in the future.

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