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• W2912446018 endingPage "1869" @default.
• W2912446018 startingPage "1860" @default.
• W2912446018 abstract "Four tetraphenylethylenes (2 a-d) containing an electron-rich 2,3,4,6-tetrahydro-1,6-dithia-3a-azaphenalene (THDTAP) moiety have been synthesized. The 2 a-d show aggregation-induced emission (AIE) with yellowish green photoluminescence (PL) in THF-H2 O (v/v, 1:9) solution and in the solid state. Compounds 2 a-d undergo 1,2-migratory shift in oxidative cyclodehydrogenation reactions to afford the unexpected products 3 a-d which display green PL in CH2 Cl2 solution and are non-emissive in the solid state. The PL intensities of 3 a-d are clearly enhanced in the presence of meta-chloroperoxybenzoic acid (mCPBA) owing to the oxidation of the S-atoms on the THDTAP moiety. In contrast, the PL of 2 a-d in THF-H2 O (v/v, 1:9) solution is quenched by adding mCPBA, ascribable to the oxidation of the C=C bond on the ethylene moiety. It is found that the absorption of 3 a-d is distinctly red-shifted from the UV/Vis region to the NIR region upon acidification, arising from the protonation of the N-atom on the THDTAP moiety. Furthermore, 3 a-d display nonlinear optical response (NLO) and optical limiting (OL) behaviour which is superior to that of the well-known OL material C60 ." @default.
• W2912446018 created "2019-02-21" @default.
• W2912446018 creator A5003609904 @default.
• W2912446018 creator A5005385582 @default.
• W2912446018 creator A5015858067 @default.
• W2912446018 creator A5028806584 @default.
• W2912446018 creator A5043111575 @default.
• W2912446018 creator A5043446520 @default.
• W2912446018 creator A5087703044 @default.
• W2912446018 creator A5091464492 @default.
• W2912446018 date "2019-03-05" @default.
• W2912446018 modified "2023-10-13" @default.
• W2912446018 title "Migratory Shift in Oxidative Cyclodehydrogenation Reaction of Tetraphenylethylenes Containing Electron‐Rich THDTAP Moiety" @default.
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