| Titre : |
Synthesis and spectroscopic investigation of cationic donor-(π-bridge)-acceptor dye, 4-[N-(5,6,7,8-tetrahydroisoquinolinium-5-ylidene)methyl]-N,N-dialkylaniline iodide |
| Type de document : |
texte imprimé |
| Auteurs : |
Beata Jedrzejewska, Auteur ; Barbara Michalak, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 288-296 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Chromatographie sur couches minces
Hemicyanine
Résonance magnétique nucléaire
|
| Index. décimale : |
667.3 Teinture et impression des tissus |
| Résumé : |
The synthesis and fundamental spectroscopic properties of eight hemicyanine (HC) dyes are presented. The dyes were prepared by the condensation of N-methyl-5,6,7,8-tetrahydroisoquinolinium iodide with p-(N,N-dialkylamino)benzaldehydes. The compounds were characterised by nuclear magnetic resonance spectroscopy and their purity was checked with the use of thin-layer chromatography. The spectroscopic properties of the dyes were determined in three organic solvents. The electronic absorption spectra of the dyes demonstrate moderate sensitivity to the nature of the substituent present in the aromatic ring and low solvent polarity dependence. In contrast to this, the positions of fluorescence bands are affected by the structure of an electron donor and solvent polarity. The 4-[N-(5,6,7,8-tetrahydroisoquinolinium-5-ylidene)methyl]-N,N-dialkylaniline iodides were applied as fluorescent probes for the monitoring of the progress of free radical polymerisation. The study on the changes in the fluorescence intensity and spectroscopic shifts of the dyes was carried out during thermally initiated polymeriszation of methyl methacrylate. The purpose of these studies was to find a relationship between the changes in the shape and intensity of probe fluorescence and the degree of monomer conversion into polymer. |
| Note de contenu : |
EXPERIMENTAL : Measurements - Synthetic procedure
RESULTS AND DISCUSSION : Molecular design and synthetic procedures - Electronic absorption and emission properties - Probing of thermally initiated polymerisation of methyl methacrylate |
| DOI : |
10.1111/j.1478-4408.2011.00311.x |
| En ligne : |
http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2011.00311.x/pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12077 |
in COLORATION TECHNOLOGY > Vol. 127, N° 5 (2011) . - p. 288-296
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