Atmospheric chemistry of 1,4-dioxane
Platz, J; Sehested, J; Mogelberg, T; Nielsen, OJ; Wallington, TJ
| HERO ID | 196086 |
|---|---|
| In Press | No |
| Year | 1997 |
| Title | Atmospheric chemistry of 1,4-dioxane |
| Authors | Platz, J; Sehested, J; Mogelberg, T; Nielsen, OJ; Wallington, TJ |
| Journal | Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases |
| Volume | 93 |
| Issue | 16 |
| Page Numbers | 2855-2863 |
| Abstract | A pulse radiolysis technique was used to measure the UV absorption spectra of c-C4H7O2 and (c-C4H7O2)O2 radicals over the range 220–320 nm, (c-C4H7O2)250 nm=(5.9±0.6)×10-18 and [(c-C4H7O2)O2 ]240nm=(4.8×0.8)×10-18 cm2 molecule-1. The observed self-reaction rate constants for the c-C4H7O2 and (c-C4H7O2)O2 radicals, defined as -d[c-C4H7O2]/dt= 2k4[c- C4H7O2]2 and -d[(c-C4H7O2)O2 ]/dt=2k5obs[(c-C4 H7O2)O2]2 were k4=(3.3±0.4)×10-11 and k5obs=(7.3±1.2)×10-1 2 cm3 molecule-1 s-1. The rate constants for reactions of (c-C4H7O2)O2 radicals with NO and NO2 were k6 (1.2±0.3)×10-11 and k7=(1.3±0.3)×10-11 cm3 molecule-1 s-1, respectively. The rate constants for the reaction of F atoms with 1,4-dioxane and the reaction of c-C4H7O2 radicals with O2, were k3=(2.4±0.7)×10-10 and k2=(8.8±0.9)×10-12 cm3 molecule-1 s-1, respectively. A relative rate technique was used to measure the rate constant for the reaction of Cl atoms with 1,4-dioxane, k17=(2.0±0.3)×10-10 cm3 molecule-1 s-1. A long-pathlength FTIR spectrometer coupled to a smog chamber system was used to show that the sole atmospheric fate of the alkoxy radical (c-C4H7O2)O is decomposition via C–C bond scission leading to the formation of H(O)COCH2CH2OC(O)H (ethylene glycol diformate). |
| Doi | 10.1039/a700598i |
| Url | http://xlink.rsc.org/?DOI=a700598i |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: Journal of the Chemical Society, Faraday Transactions |
| Is Public | Yes |
| Is Qa | No |