Detail of "121207-31-6"

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Interaction mechanism in pyrromethene dye/photoacid generator photosensitive system for high-speed photopolymer

All Rights Reserved. Interaction mechanism in pyrromethene dye/photoacid generator photosensitive system for high-speed photopolymer. Suzuki, Shota; Allonas, Xavier; Fouassier, Jean-Pierre; Urano, Toshiyuki; Takahara, Shigeru; Yamaoka, Tsuguo (Department de Photochimie Generale, Ecole Nationale Superieure de Chimie de Mulhouse, Mulhouse 68093, Fr.). Journal of Photochemistry and Photobiology, A: Chemistry, 181(1), 60-66 (English) 2006 Elsevier B.V. CODEN: JPPCEJ. ISSN: 1010-6030. DOCUMENT TYPE: Journal CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) The sensitization mechanism of a photoacid generator (PAG), N-(trifluoromethanesulfonyloxy)-1,8-naphthalimide (NIOTf) by a pyrromethene sensitizing dye, such as 1,3,5,7,8-pentamethyl pyrromethene BF2 complex (HMP), 2,6-diethyl-1,3,5,7,8-pentamethylpyrromethene BF2 complex (EMP), and 2,6-diethyl-8-phenyl-1,3,5,7-tetramethylpyrromethene BF2 complex (EPP), was studied by means of absorption and fluorescence spectroscopies, product anal. and nanosecond laser flash photolysis. For all the systems pyrromethene/NIOTf, the fluorescence quenching was nearly diffusion-controlled. This reaction involves an electron-transfer process from the excited singlet state of the pyrromethene deriv. to NIOTf, as supported by the neg. values of the Gibbs free energy change and the observation of the pyrromethene radical cations. The triplet state of the pyrromethene dyes was found to be unreactive toward NIOTf. 85342-62-7 and 121207-31-6 which are cas registry numbers of chemicals are mentioned. Photoacid generation quantum yields for the sensitization were also measured and they showed a correlation with the electron-transfer rate const. from the dye singlet excited state. Finally, the system EPP/NIOTf was applied to printing technol. with an appropriate binder polymer bearing an acetal protection group. By controlling the exposure energy and the post-exposure baking (PEB) process, a printing plate was obtained with a high resoln. .