131545-72-7Relevant academic research and scientific papers
Palladium-catalyzed oxidative homocoupling of potassium alkenyltrifluoroborates: synthesis of symmetrical 1,3-dienes
Weber, Minéia,Singh, Fateh V.,Vieira, Adriano S.,Stefani, Hélio A.,Paix?o, Marcio W.
experimental part, p. 4324 - 4327 (2009/10/26)
Herein, we describe a convenient method for the synthesis of symmetrical 1,3-dienes employing an oxidative palladium-catalyzed homocoupling of potassium alkenyltrifluoroborates providing products in good yields relative to existing methodologies. This is the first report of a cross-dimerization of potassium alkenyltrifluoroborates.
Free Enthalpy Dependence of Free Radical Yield of Photoincuced Electron Transfer in Acetonitrile
Kikuchi, Koichi,Takahashi, Yasutake,Hoshi, Masato,Niwa, Taeko,Katagiri, Tomoharu,Miyashi, Tsutomu
, p. 2378 - 2381 (2007/10/02)
The free enthalpy dependence of the free-radical yield ΦR of the electron-transfer (ET) fluorescence quenching was studied in acetonitrile by using anthracenecarbonitriles as the electron-accepting fluorescer and 1,4-diphenyl-1,3-butadienes as the electron-donating quencher. ΦR decreases, passes through a minimum, increases with increase of ΔGf, the free enthalpy change involved in the actual ET process, and then suddenly falls when ΔGf goes beyond -0.25 eV.Switchover of the quenching mechanism was suggested for the ET fluorescence quenching: The radical pairs are exclusively produced by the full ET in the encounter state bet ween the fluorescer and the quencher when ΔGf is smaller than -0.4 eV, but in contrast through the partial ET, i.e., the exciplex formation as the primary quenching products when ΔGf is larger than -0.4 eV.
