Novel Photoimaging System Based on Photoinduced Electron Transfer in Polymers Containing Pendant Benzophenone−Borate Salts

Relative Activity of Possible Initiating Species Produced from Photolysis of Tetraphenyl and Triphenylbutyl Borates As Measured by Fluorescence Probe Techniques

“…3,[7][8][9][10] Interestingly, tetraphenylborates paired with a similar cationic partner have been observed to have similar initiating efficiencies. [11][12][13] Tetraphenylborates, when oxidized, are often prone to back electron transfer. Since phenyl radicals are produced from tetraphenylborates upon oxidation inefficiently, if at all, we have surmised that other initiating species must account for the efficiency of tetraarylborate salts.…”

“…The photochemistry of tetrasubstituted borate salts has attracted substantial recent research interest. − Triphenylbutylborates have been studied most extensively, and the butyl radical formed when they are oxidized has been found to be the dominant initiating species for radical polymerization. ,− Interestingly, tetraphenylborates paired with a similar cationic partner have been observed to have similar initiating efficiencies. − Tetraphenylborates, when oxidized, are often prone to back electron transfer. Since phenyl radicals are produced from tetraphenylborates upon oxidation inefficiently, if at all, we have surmised that other initiating species must account for the efficiency of tetraarylborate salts.…”

Novel Imaging Materials: Synthesis and Characterization of Poly[N,N-dimethyl-N-(p-benzoylbenzyl)-N-(2-methacryloylethyl)ammonium triphenylbutylborate] as a Single-Component Photoimaging System

“…The preliminary evaluation of polymer 4 acting as single-component positive-tone photoimaging system has been previously performed by us. 26 The system showed promising results as a good-quality image with slight "footing" was formed. However, the low sensitivity of polymer 4 to the incident irradiation was considered as a drawback.…”

Highly Active Visible-Light Photocatalysts for Curing a Ceramic Precursor1

“…Our interest is in using laser techniques (stereolithography) 22-26 and photoimaging − to produce shaped preceramic objects or thin-film patterns that can be converted into ceramic with retention of the photocured shapes and patterns. For this work platinum(II) bis(β-diketonate) complexes [Pt(L) 2 ] have been employed as hydrosilation photocatalysts. , The utility of Pt(L) 2 for photopolymerization and photocuring of carbosilanes was demonstrated with the UV absorbing homologue platinum(II) bis(acetylacetonate), or Pt(acac) 2 .…”

“…Highly crosslinked polymers satisfy this requirement. 21 Our interest is in using laser techniques (stereolithography) [22][23][24][25][26] and photoimaging [27][28][29][30] to produce shaped preceramic objects or thin-film patterns that can be converted into ceramic with retention of the photocured shapes and patterns. For this work platinum(II) bis(β-diketonate) complexes [Pt(L) 2 ] have been employed as hydrosilation photocatalysts.…”