Functionalized 4-(Dialkylamino)-4‘-nitrostilbenes as Reactive Fluorescent Probes for Monitoring the Photoinitiated Polymerization of MMA

Autor:	Ananda M. Sarker, Wolter F. Jager, Douglas C. Neckers
Rok vydání:	1999
Předmět:	Polymers and Plastics Tertiary amine Bulk polymerization Organic Chemistry Fluorescence spectrometry Photochemistry Fluorescence Inorganic Chemistry chemistry.chemical_compound Monomer Photopolymer chemistry Polymerization Materials Chemistry Methyl methacrylate
Zdroj:	Macromolecules. 32:8791-8799
ISSN:	1520-5835 0024-9297
Popis:	A series of reactive (2, 4) and nonreactive (3, 5) fluorescent probes based on 4-(dimethylamino)-4‘-nitrostilbene (1) have been synthesized. Substitution of a methyl on the dimethylamino group results in blue shifts in emission and increases in Φf, and corresponding reactive and nonreactive probes are indistinguishable. Emission spectra of 1−5 were recorded during the photoinitiated polymerization of methyl methacrylate (MMA). For nonreactive probes, only minor changes in emission are observed during the first 40% of the reaction, while at conversions between 50 and 90% λmax is proportional to the conversion. For reactive probes shifts of λmax during the early stages of the process are observed, enabling them to monitor the full polymerization process. It was proven that the shift in emission during the first stage of the reaction is due to covalent attachment of the reactive probes to the PMMA backbone.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0047da5d6de4a1454a70e1473c95dfd7 https://doi.org/10.1021/ma9907688 Zobrazit plný text záznamu