- Recycling by-products in new small molecular electrochromic materials with ultra bistability
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The potential of three arylamine based molecules for electrochromic applications is investigated herein. The latter, by-product of a Buchwald-Hartwig reaction were fully characterized, instead of being thrown away, due to their structural analogy with well-known electrochromic analogues. It turns out that impressive and stable color changes were recorded when embedded in electrochromic devices. Finally, a flexible patterned electrochromic demonstrator was also fabricated, preliminary steps toward a potential and more environmental friendly signposting mass application.
- Jiang, Yue,Xian, Zhike,Meng, Yuying,Zhou, Guofu,Cabanetos, Clément,Roncali, Jean,Liu, Jun-ming,Gao, Jinwei
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- Condensations of 1,4-Cyclohexanediones and Secondary Aromatic Amines. The Formation of Alkyldiarylamines and Triarylamines
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Condensation of 1,4-cyclohexanedione with N-alkylarylamines gives N-alkyl-N-arylanilines, and that with diarylamines gives triarylamines.A mechanism involving dehydration of monoenamines of the 1,4-dione is proposed for the reaction.Relative rates of substituted N-ethylanilines on competitive reactions plotted vs.Hammet's ? values gave -2.0 as the ρ value.In separate reactions, however, a different tendency is noted for the yield, that is, the ease of reactions with p-chloro and p-nitro derivatives.This discrepancy is explained in terms of acidities of the conjugate acids of the amines used as the actual catalysts.
- Haga, Kazuo,Oohashi, Masayuki,Kaneko, Ryohei
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- On attempted oxidative cyclisation of isomeric N,N'-diphenylphenylenediamines and their N,N'-dimethyl derivatives by palladium(II) acetate and UV light
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The cyclisation of N,N'-diphenyl-o-, m- and p-phenylenediamines and their N,N'-dimethyl derivatives by palladium(II) acetate and UV light separately led to both bis-cyclisation, furnishing indolocarbazoles, and mono-cyclisations with cleavage as well as retention of one substituent, producing substituted carbazoles.
- Chakrabarty,Batabyal,Khasnobis
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p. 3651 - 3668
(2007/10/03)
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- 2,3-c.
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Of the five possible indolocarbazoles the title compound (CC) is the only unknown isomer. It is easily prepared photochemically from N,N prime -diphenyl-1,4-phenylenediamine (AA). Steady-state and flash experiments have shown that the reaction takes place
- Weller,Grellmann
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p. 6268 - 6273
(2007/10/02)
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