Titre : |
Synthesis and photochemical reaction of benzo[a]quinoxalino[2,3-c]phenazine dyes |
Type de document : |
texte imprimé |
Auteurs : |
Radoslaw Podsiadly, Auteur ; Jolanta Sokolowska, Auteur ; Jolanta Kolinska, Auteur ; Aleksandra Grzelakowska, Auteur |
Année de publication : |
2017 |
Article en page(s) : |
p. 498-505 |
Note générale : |
Bibliogr. |
Langues : |
Anglais (eng) |
Catégories : |
Analyse spectrale Colorants -- Synthèse Photochimie Photoréactivité Photoréticulation
|
Index. décimale : |
667.3 Teinture et impression des tissus |
Résumé : |
Novel dyes based on the benzo[a]quinoxalino[2,3-c]phenazine skeleton and necessary intermediates (benzo[a]phenazine-5,6-diones) were synthesized. The heterocyclic dyes and benzo[a]phenazine-5,6-diones were characterized using 1H nuclear magnetic resonance (NMR) spectroscopy and chemical ion (CI) mass spectrometry. Their spectral properties, such as absorption and emission spectra and fluorescence quantum yield, were also measured. Experimental results demonstrated that photolysis of benzo[a]quinoxalino[2,3-c]phenazine dyes in 2-propanol and cyclohexene oxide leads to dihydro derivatives. The same product is formed during irradiation of dye/iodonium salt photoredox pairs in monomers. These compounds absorb incident light at longer wavelength and act as in situ sensitizers. Thus, when a composition was irradiated with a xenon lamp through a 395 cutoff filter, higher conversion was achieved than under monochromatic light. |
Note de contenu : |
- EXPERIMENTAL : General - Quantum chemical calculations - Synthesis - Photochemical experiments
- RESULTS AND DISCUSSION : Synthesis and spectroscopic characterization of benzo[a]quinoxalino[2,3-c]phenazine dyes 8 - Photoreaction and photopolymerization |
DOI : |
10.1111/cote.12300 |
En ligne : |
https://drive.google.com/file/d/1ta69j7mDmdNTGqyeKydC8Sl_WMhHyTGv/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29497 |
in COLORATION TECHNOLOGY > Vol. 133, N° 6 (12/2017) . - p. 498-505