Antinolo, M. published the artcilePhotochemistry of CF3(CH2)2CHO in air: UV absorption cross sections between 230 and 340 nm and photolysis quantum yields at 308 nm, Recommanded Product: 3,3,3-Trifluoropropan-1-ol, the publication is Journal of Photochemistry and Photobiology, A: Chemistry (2012), 231(1), 33-40, database is CAplus.
This work constitutes the first study on the photochem. degradation process of CF3(CH2)2CHO. First, the wavelength and temperature dependence of the UV absorption cross sections, σλ, was determined The n → π* electronic transition band of C=O chromophore was characterized between 230 and 340 nm in the 269-323 K range. A hyperchromic effect was observed in the structured part of the band when the temperature decreases. The pulsed laser photolysis of a stationary mixture of CF3(CH2)2CHO/cyclohexane (OH-scavenger)/air or N2 was carried out at 308 nm. Online Fourier transform IR (FTIR) spectroscopy was employed to monitor the decay of CF3(CH2)2CHO and to obtain the photolysis quantum yield as a function of total pressure (20.5-760 Torr). A slight curvature in the Stern-Volmer plot was observed at pressures lower than 75 Torr. At high pressures, the pressure dependence of can be described by a Stern-Volmer relationship. Photodissociation of CF3(CH2)2CHO at 308 nm can produce HCO and CF3(CH2)2 radicals , CF3CH2CH3 and CO and CF3(CH2)2CO radicals and H atoms. HCO radicals are rapidly converted into CO in the presence of O2. Formation of CF3CH2CHO and CF3CH2CH2OH evidences the importance of secondary chem. involving CF3(CH2)2 radicals formed in channel . Further photodegradation of CF3CH2CHO yields mainly CF3CHO. Small quantities of HC(O)OH were also detected. CF3(CH2)2C(O)OH was only observed in the absence of OH-scavenger, implying that formation of CF3(CH2)2CO radicals in channel is not an important photolysis pathway. Consequently, photodissociation of CF3(CH2)2CHO in the actinic region is a source of shorter fluorinated oxygenated compounds, but it is not expected to be a source of fluorinated acids.
Journal of Photochemistry and Photobiology, A: Chemistry published new progress about 2240-88-2. 2240-88-2 belongs to alcohols-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Aliphatic hydrocarbon chain,Alcohol, name is 3,3,3-Trifluoropropan-1-ol, and the molecular formula is C3H5F3O, Recommanded Product: 3,3,3-Trifluoropropan-1-ol.
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