Preparation of thermally stable dyes derived from diketopyrrolopyrrole pigment by polymerisation with polyisocyanate binder / Chun Yoon in COLORATION TECHNOLOGY, Vol. 131, N° 1 (02/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 1 (02/2015) . - p. 2-8 Titre : Preparation of thermally stable dyes derived from diketopyrrolopyrrole pigment by polymerisation with polyisocyanate binder Type de document : texte imprimé Auteurs : Chun Yoon, Auteur ; Hye-Sun Kwon, Auteur ; Jae-Sung Yoo, Auteur ; Hyun-young Lee, Auteur ; Ji-Hye Bae, Auteur ; Jae-Hong Choi, Auteur Année de publication : 2015 Article en page(s) : p. 2-8 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Colorants -- Solubilité Colorants -- Synthèse Pigments organiques Polyisocyanates Résines photosensibles Stabilité thermique Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Four thermally stable and solvent soluble dyes were prepared from diketopyrrolopyrrole pigment via an N-alkylation reaction. To improve the thermal stability of the dyes, a hydroxyl functional group that could react with blocked polyisocyanates was introduced into the dyes. The prepared dyes had absorption maxima near 500 nm, and the chromaticity diagrams of all synthesised dyes exhibited smaller x and y values than those of CI Pigment Red 254, indicating that the colour of the synthesised dyes was close to an orange shade. The dyes reacting with blocked polyisocyanates showed extremely high thermal stability compared with analogous dyes not reacting with polyisocyanates. Note de contenu : - EXPERIMENTAL : Materials and instrumentation - Synthesis of dyes - Preparation of a colour filter photoresist - Preparation of a colour filter photoresist without polyisocyanates - Preparation of a colour filter photoresist with polyisocyanates - Preparation of glass sheets - Solubility investigation - Measurement of spectral and chromatic properties - Thermal stability measurement - RESULTS AND DISCUSSION : Dye synthesis - Dye solubility - Characterisation of spectral properties - Chromatic properties of spin-coated colour filters - Characterisation of the thermal stability of dyes DOI : 10.1111/cote.12119 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12119 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22967 [article]

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Synthesis of quenchers to control the fluorescence of Rhodamine B and improve the contrast ratio of blue filters for LCDs / Hyun-young Lee in COLORATION TECHNOLOGY, Vol. 132, N° 4 (08/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 4 (08/2016) . - p. 310-319 Titre : Synthesis of quenchers to control the fluorescence of Rhodamine B and improve the contrast ratio of blue filters for LCDs Type de document : texte imprimé Auteurs : Hyun-young Lee, Auteur ; Hye-Sun Kwon, Auteur ; Jin-Kyu Oh, Auteur ; Hye-Min Lee, Auteur ; Jae-Hong Choi, Auteur Année de publication : 2016 Article en page(s) : p. 310-319 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale Caractérisation Colorants -- Solubilité Colorants -- Synthèse Filtres Fluorescence Stabilité thermique Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, seven quenchers (derived from either anthraquinone, phthalimidylazo, or dipyrromethene chromophores) were prepared as candidates for additives to suppress fluorescence in blue colour filters and thus improve their contrast ratio. To reduce fluorescence effectively, quenchers must have typical properties such as spectral compatibility by which the absorbance spectrum of the quencher overlaps the fluorescence emission spectrum, exhibit high molar extinction coefficients, and exert little influence on the colour of the blue filter. The seven quenchers possessed absorption maxima of approximately 570–620 nm and reduced fluorescence (by more than 24%). Those quenchers tested in filter coatings increased their contrast ratios by about 50%. They thus effectively quenched fluorescence of the blue filter but without greatly affecting the chromaticity coordinates of the filters. Note de contenu : - EXPERIMENTAL : Materials and instrumentation - Synthesis - Colour filter preparation - Investigation of solubility - Measurement of spectroscopic properties - Measurement of thermal stability - RESULTS AND DISCUSSION : Synthesis of dyes - Quencher solubility - Characterisation of quencher spectroscopic properties - Fluorescence properties and FRET efficiency - Spectroscopic and colour properties of filters - Characterisation of thermal stability DOI : 10.1111/cote.12222 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12222 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26733 [article]

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