Hurley M D, Ball J C, Wallington T J
Systems Analytics & Environmental Sciences Department, Ford Motor Company, Mail Drop SRL-3083, Dearborn, Michigan 48121-2053, USA.
J Phys Chem A. 2007 Oct 4;111(39):9789-95. doi: 10.1021/jp0753530. Epub 2007 Sep 13.
Smog chamber/FTIR techniques were used to study the atmospheric chemistry of the Z and E isomers of CF3CF=CHF, which we refer to as CF3CF=CHF(Z) and CF3CF=CHF(E). The rate constants k(Cl + CF3CF=CHF(Z)) = (4.36 +/- 0.48) x 10-11, k(OH + CF3CF=CHF(Z)) = (1.22 +/- 0.14) x 10-12, and k(O3 + CF3CF=CHF(Z)) = (1.45 +/- 0.15) x 10-21 cm3 molecule-1 s-1 were determined for the Z isomer of CF3CF=CHF in 700 Torr air diluent at 296 +/- 2 K. The rate constants k(Cl + CF3CF=CHF(E)) = (5.00 +/- 0.56) x 10-11, k(OH + CF3CF=CHF(E)) = (2.15 +/- 0.23) x 10-12, and k(O3 + CF3CF=CHF(E)) = (1.98 +/- 0.15) x 10-20 cm3 molecule-1 s-1 were determined for the E isomer of CF3CF=CHF in 700 Torr air diluent at 296 +/- 2 K. Both the Cl-atom and OH-radical-initiated atmospheric oxidation of CF3CF=CHF give CF3C(O)F and HC(O)F in molar yields indistinguishable from 100% for both the Z and E isomer. CF3CF=CHF(Z) has an atmospheric lifetime of approximately 18 days and a global warming potential (100 year time horizon) of approximately 6. CF3CF=CHF(E) has an atmospheric lifetime of approximately 10 days and a global warming potential (100 year time horizon) of approximately 3. CF3CF=CHF has a negligible global warming potential and will not make any significant contribution to radiative forcing of climate change.
利用烟雾箱/傅里叶变换红外光谱技术研究了CF3CF=CHF的Z型和E型异构体（分别称为CF3CF=CHF(Z)和CF3CF=CHF(E)）的大气化学。在700托空气稀释剂中，于296±2K下测定了CF3CF=CHF(Z)异构体的速率常数：k(Cl + CF3CF=CHF(Z)) = (4.36 ± 0.48)×10-11、k(OH + CF3CF=CHF(Z)) = (1.22 ± 0.14)×10-12和k(O3 + CF3CF=CHF(Z)) = (1.45 ± 0.15)×10-21 cm3·分子-1·秒-1。在700托空气稀释剂中，于296±2K下测定了CF3CF=CHF(E)异构体的速率常数：k(Cl + CF3CF=CHF(E)) = (5.00 ± 0.56)×10-11、k(OH + CF3CF=CHF(E)) = (2.15 ± 0.23)×10-12和k(O3 + CF3CF=CHF(E)) = (1.98 ± 0.15)×10-20 cm3·分子-1·秒-1。对于CF3CF=CHF(Z)和CF3CF=CHF(E)异构体，由氯原子和羟基自由基引发的CF3CF=CHF大气氧化反应生成CF3C(O)F和HC(O)F的摩尔产率均与100%无明显差异。CF3CF=CHF(Z)的大气寿命约为18天，全球变暖潜能值（100年时间跨度）约为6。CF3CF=CHF(E)的大气寿命约为10天，全球变暖潜能值（100年时间跨度）约为3。CF3CF=CHF的全球变暖潜能值可忽略不计，不会对气候变化的辐射强迫产生任何显著贡献。
