67592-95-4Relevant academic research and scientific papers
Efficient photooxygenation of olefins by a C60 derivative bearing an organofluorine tail
Nagashima, Hideo,Hosoda, Koji,Abe, Tomoaki,Iwamatsu, Shoichi,Sonoda, Takaaki
, p. 469 - 470 (2007/10/03)
A C60 derivative bearing an organofluorine tail through the dimethylsilyl moiety (1) was proved to be an efficient photosensitizer in C6F6. Photooxygenation of olefins or dienes was accomplished by catalysis of 1 (0.5 - 1.5 mo1%) at room temperature under an oxygen atmosphere.
Singlet oxygen and electron-transfer mechanisms in the dicyanoanthracene-sensitized photooxidation of 2,3-diphenyl-1,4-dioxene
Silverman, Scott K.,Foote, Christopher S.
, p. 7672 - 7675 (2007/10/02)
The 9,10-dicyanoanthracene-sensitized photooxidation of 2,3-diphenyl-1,4-dioxene in CH3CN produces ethylene glycol dibenzoate and small amounts of epoxide. Most of the diester is formed from singlet oxygen via the dioxetane, and only a small amount by electron transfer. The epoxide is a primary electron-transfer product. Various mechanistic possibilites for the electron-transfer are considered.
EFFECTS OF HETEROATOM SUBSTITUENTS ON THE PROPERTIES OF 1,2-DIOXETANES
Handley, Richard S.,Stern, Alan J.,Schaap, A. Paul
, p. 3183 - 3186 (2007/10/02)
Nitrogen and sulfur-substituted dioxetanes exhibit dramatically lower activation energies for decomposition compared to the corresponding oxygen-bearing dioxetane.A mechanism involving intramolecular electron-transfer processes is proposed for the cleavage of these unstable dioxetanes.
Novel Rose Bengal Derivatives: Synthesis and Quantum Yield Studies
Lamberts, Joseph J. M.,Schumacher, Douglas R.,Neckers, D. C.
, p. 5879 - 5883 (2007/10/02)
The synthesis of several rose bengal derivatives soluble in nonpolar solvents is described.The bis(triethylammonium salt) of rose bengal, 2, and the triethylammonium salt of the benzyl and ethyl esters of rose bengal, 10 and 11, are soluble in methylene c
DIOXETANO-CROWN ETHERS. STABILIZATION THROUGH COMPLEXATION WITH METAL IONS
Inoue, Yoshihisa,Ouchi, Mikio,Hayama, Hidekazu,Hakushi, Tadao
, p. 431 - 434 (2007/10/02)
The first members of dioxetanocrown ethers 3 and 4 were prepared in methylene blue-sensitized,photooxygenations of 9- and 18-membered stilbecrown ethers 1 and 2, and the activation paramethers for the thermolyses of 3 and 4 were obtained.Thermal decomposition of the bis-dioxetano-18-crown-6 4 was decelerated,or accelerated in the presence of alkali metal salts depending upon the nucleophilicity of the counter anion.
SUBSTITUENT EFFECTS ON THE DECOMPOSITION OF 1,2-DIOXETANES: A HAMMETT CORRELATION FOR SUBSTITUTED 1,6-DIARYL-1,5,7,8-TETRAOXABICYCLOY4.2.0(OCTANES
Schaap, Paul A.,Gagnon, Steven D.,Zaklika, K. A.
, p. 2943 - 2946 (2007/10/02)
Rates of decomposition for 1,2-dioxetanes obtained from addition of singlet oxygen to substituted 2,3-diaryl-1,4-dioxenes have been found to obey a Hammett relationship with ?=++-0.24 (n 15, r 0.92).The results are taken as support for a biradical mechanism.
Polymer-Based Sensitizers for Photochemical Reactions. Silica gel as a Support
Tamagaki, Seizo,Liesner, Cathy E.,Neckers, Douglas C.
, p. 1573 - 1576 (2007/10/02)
Silica gel has been converted to silylated derivatives which can be converted to sensitizers for singlet oxygen formationn.The silica gel sensitizers, Si>-rose bengals, are versatile and useful in both polar and nonpolar media. Si>-Rose bengal has been studied as a source of singlet oxygen and its uses in reactions of sulfite ion, tryptophan, and 2,3-diphenyldioxene are reported.Results are compared with unbound and polystyrene-based rose bengal (-rose bengal).
