50614-06-7Relevant academic research and scientific papers
Photoreaction between 2-benzoylthiophene and phenol or indole
Perez-Prieto, Julia,Bosca, Francisco,Galian, Raquel E.,Lahoz, Agustin,Domingo, Luis R.,Miranda, Miguel A.
, p. 5104 - 5113 (2007/10/03)
Laser flash photolysis, density functional theory (DFT) calculations, and product studies have been performed to understand the mechanism of photoreduction of 2-benzoylthiophene (BT) in the presence of phenol or indole. Time-resolved experiments showed th
One-Electron Oxidation of Indoles and Acid-Base Properties of the Indolyl Radicals
Shen, Xinhua,Lind, Johan,Merenyi, Gabor
, p. 4403 - 4406 (2007/10/02)
The rates of attack of OH. N3., Br2.-, CO3.-, and ClO2. on indole and four methylated indoles have been determined.All primary oxidants except for OH. were found to form indolyl radicals quantitatively.The OH. radical produces 44percent indolyl radicals with indole. 3-Methylation affects this yield only slightly while 2- or N-methylation increase the yield of indolyl radicals above 60percent.The acid-base properties of the indolyl radicals have also been explored.Finally the one-electron reduction potential of the radical cation of indole has been determined to be 1.24 +/- 0.01 V.
Photochemical Reactions of Triplet Acetone with Indole, Purine, and Pyrimidine Derivatives
Kasama, Kunihiko,Takematsu, Akiko,Arai, Shigeyoshi
, p. 2420 - 2427 (2007/10/02)
The photochemical reactions of triplet acetone with indole, indole derivatives (1-methyl-, 2-methyl-, 3-methyl-, 5-methyl-, and 7-methylindole, and tryptophan), purine derivatives (caffeine, 7-methylguanine, adenine, adenosine, and guanosine), and a pyrimidine derivative (thymine) have been studied in aqueous solutions by using a KrF or ArF laser.The quenching processes of triplet acetone by indoles, being diffusion controlled, occur via the following paths: triplet-triplet energy transfer, electron transfer, photoaddition of triplet acetone to the 2-carbon atom of the indole ring, and deactivation without a chemical change.The yields of energy transfer, electron transfer, and photoaddition were determined from absorbance measurements.The transient absorptions due to triplet states were observed for caffeine, 7-methylguanine, and thymine, while weak transient absorptions which showed apparent second-order decays were observed for adenine, adenosine, and guanosine.Triplet acetone is quenched mainly via T-T energy transfer in caffeine, 7-methylguanine, and thymine.The weak absorptions may be attributed to neutral radicals in adenine and adenosine and to a cation radical in guanosine.
