New Intramolecular Fluorescence Probes That Monitor Photoinduced Radical and Cationic Cross-Linking

Autor:	Bernd Strehmel, and Ananda M. Sarker, Douglas C. Neckers, John H. Malpert
Rok vydání:	1999
Předmět:	Polymers and Plastics Photoisomerization Chemistry Organic Chemistry Radical polymerization Solvatochromism Fluorescence spectrometry Cationic polymerization Photochemistry Fluorescence Ring-opening polymerization Inorganic Chemistry Intramolecular force Materials Chemistry
Zdroj:	Macromolecules. 32:7476-7482
ISSN:	1520-5835 0024-9297
Popis:	The fluorescence probes trans,trans-1,4-bis[2-(2‘,5‘-dimethoxy)phenylethenyl)-2,3,5,6-tetrafluorobenzene (1) and trans,trans-1,4-bis[2-(3‘,4‘,5‘-trimethoxy)phenylethenyl)-2,3,5,6-tetrafluorobenzene (2) show solvatochromic behavior yielding slopes in the Lippert−Mataga equation of −13 300 and −13 700 cm-1, respectively. 1 sensitively probes progress in both photoinduced radical and cationic cross-linking. Both 1 and 2 show minor tendencies for trans−cis photoisomerization. Substituted stilbenes such as trans-2-(2‘,5‘-dimethoxyphenyl)ethenyl-2,3,4,5,6-pentafluorobenzene (1r) and trans-2-(3‘,4‘,5‘-trimethoxyphenyl)ethenyl-2,3,4,5,6-pentafluorobenzene (2r) are less solvatochromic in fluorescence but evidence enhanced tendency toward photoisomerization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3bee496b66c72c046712a53b29793680 https://doi.org/10.1021/ma990773b Zobrazit plný text záznamu