“…The secondary photoproduct mediates hydrosilation to yield the cross-linked products. A similar process was recently postulated for photoactivated hydrosilation of silicone polymers with trialkyl(β-dicarbonyl) platinum(IV) complexes. , 1 Photoactivation of Pt(L) 2 Complexes in the Presence of the OMSM and TVS for Hydrosilation Cross-Linking …”
Section: Resultsmentioning
confidence: 54%
“…A similar process was recently postulated for photoactivated hydrosilation of silicone polymers with trialkyl(β-dicarbonyl) platinum-(IV) complexes. 49,50 Photolysis of the Pt(L) 2 complexes results in bleaching of the lowest energy absorption band and is a measure of step 1 in the activation process. Lewis et al conducted photolysis studies that correlated the disappearance of this band with the appearance of NMR signals for the primary photoproduct.…”
Three platinum(II) bis(β-diketonate) complexes are highly active for photocatalytic hydrosilation cross-linking of oligo[(methylsilylene)methylene] with tetravinylsilane. Platinum(II) bis(benzoylacetonate), platinum(II) bis(trifluoroacetylacetonate), and platinum(II) bis(benzoyltrifluoroacetonate) are photoactivated by visible light for catalysis, while platinum(II) bis(hexafluoroacetylacetonate) can be used as a thermal catalyst. Kinetic data from FT-IR and UV-visible spectroscopies characterizing Si-H bond conversion and catalyst photolysis are reported.
“…The secondary photoproduct mediates hydrosilation to yield the cross-linked products. A similar process was recently postulated for photoactivated hydrosilation of silicone polymers with trialkyl(β-dicarbonyl) platinum(IV) complexes. , 1 Photoactivation of Pt(L) 2 Complexes in the Presence of the OMSM and TVS for Hydrosilation Cross-Linking …”
Section: Resultsmentioning
confidence: 54%
“…A similar process was recently postulated for photoactivated hydrosilation of silicone polymers with trialkyl(β-dicarbonyl) platinum-(IV) complexes. 49,50 Photolysis of the Pt(L) 2 complexes results in bleaching of the lowest energy absorption band and is a measure of step 1 in the activation process. Lewis et al conducted photolysis studies that correlated the disappearance of this band with the appearance of NMR signals for the primary photoproduct.…”
Three platinum(II) bis(β-diketonate) complexes are highly active for photocatalytic hydrosilation cross-linking of oligo[(methylsilylene)methylene] with tetravinylsilane. Platinum(II) bis(benzoylacetonate), platinum(II) bis(trifluoroacetylacetonate), and platinum(II) bis(benzoyltrifluoroacetonate) are photoactivated by visible light for catalysis, while platinum(II) bis(hexafluoroacetylacetonate) can be used as a thermal catalyst. Kinetic data from FT-IR and UV-visible spectroscopies characterizing Si-H bond conversion and catalyst photolysis are reported.
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