Dyes derived from 1,4-naphthoquinone as initiators for radical and cationic photopolymerisation / Agnieszka Szymczak in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 5 (2012) . - p. 378-386 Titre : Dyes derived from 1,4-naphthoquinone as initiators for radical and cationic photopolymerisation Type de document : texte imprimé Auteurs : Agnieszka Szymczak, Auteur ; Radoslaw Podsiadly, Auteur ; Karolina Bazela, Auteur ; Jolanta Sokolowska, Auteur Année de publication : 2012 Article en page(s) : p. 378-386 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amorceurs (chimie) Colorants -- Synthèse Naphtoquinone Photochimie Photoréticulation Polyaddition Spectrométrie de masse Spectroscopie de la résonance magnétique nucléaire Index. décimale : 667.3 Teinture et impression des tissus Résumé : Several 2-phenylamino-1,4-naphthoquinone-based dyes and two related benzo[2,3-b]–phenazines were synthesised and characterised by proton nuclear magnetic resonance spectroscopy and electron ionisation mass spectrometry. The electrochemical and spectral properties of these compounds were investigated. The synthesised dyes were found to be capable photosensitisers for radical (reducible/oxidisable) and cationic polymerisations, respectively. In radical polymerization, better results in the oxidisable process were achieved. Note de contenu : - EXPERIMENTAL : General - Synthesis of 2-(4-chloroanilino)-3-chloro-1,4-naphthoquinone Id - Synthesis of 2-(4-chloroanilino)-3-bromo-1,4-naphthoquinone IId - Synthesis of 6,11-dihydro-benzo[2,3-b]phenazine-6,11-dione IIIa - Photochemical DOI : 10.1111/j.1478-4408.2012.00391.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00391.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15806 [article]

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The application of the microwave irradiation to the synthesis of azo pigments / Krzysztof Wojciechowski in PAINTINDIA, Vol. LVII, N° 3 (03/2007)

[article]  inPAINTINDIA > Vol. LVII, N° 3 (03/2007) . - p. 105-115 Titre : The application of the microwave irradiation to the synthesis of azo pigments Type de document : texte imprimé Auteurs : Krzysztof Wojciechowski, Auteur ; Zbigniew Niewiadomski, Auteur ; Agnieszka Szymczak, Auteur Année de publication : 2007 Article en page(s) : p. 105-115 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants azoïques Micro-ondes Traitement par irradiation Index. décimale : 667.9 Revêtements et enduits Résumé : Synthesis of monoazo and disazo pigments by means of microwave (mv) irradiation has been investigated. As a medium able to cause the conversion of irradiation water was used. The results of pigments synthesis with the use ofmv energy were compared with the results of synthesis of analogical dyes obtained by means of the "classic" method. The carried out examinations showed that on the yield of the reaction with the use ofmv irradiation have an influence: the kind of diazo and coupling component, the microwave power and time of irradiation. In some cases the "microwave" method appeared to be the more efficient one as the "classic" method. Note de contenu : - Experimental : Synthesis of monoazo pigments - Synthesis of disazo pigments - Spectrophotometric analysis - Discussion of results : The results of synthesis of monoazo pigments - The results of synthesis of disazo pigments - Spectrophotometric analysis Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11469 [article]

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