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|Title:||Molecular hybrid optical limiting materials from polyhedral oligomer silsequioxane: Preparation and relationship between molecular structure and properties|
|Citation:||Su, X., Guang, S., Li, C., Xu, H., Liu, X., Wang, X., Song, Y. (2010). Molecular hybrid optical limiting materials from polyhedral oligomer silsequioxane: Preparation and relationship between molecular structure and properties. Macromolecules 43 (6) : 2840-2845. ScholarBank@NUS Repository. https://doi.org/10.1021/ma902789g|
|Abstract:||A series of new molecular hybrids with stilbene chromophore (H1-H4) are prepared by hydrosilylation of octahydridosilsesquioxane (T8 H). AU these stilbene-containing hybrid materials are soluble in common organic solvents, such as chloroform, toluene, THF, and 1, 2-dichloroethane, and possess good film-forming properties. Their structures and properties are characterized and evaluated by FT-IR, NMR, UV, PL, TGA, DSC, nonlinear optical (NLO), and optical limiting (OL) analyses. The results show that the thermal decomposition temperatures (Td, 5 mass % loss) of the hybrids are 20 - 60 °C greater than their corresponding stilbene monomers, and the hybrids show obvious nonlinear absorption (β up to 2.56 × 10-11 m/W) and optical limiting properties. The larger excited-state absorption cross sections than corresponding ground-state absorption cross sections of the hybrids indicate that reverse saturable absorption is a major mechanism responsible for the optical limiting of the hybrids. ©2010 American Chemical Society.|
|Appears in Collections:||Staff Publications|
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