Photodissociation of formic acid
文献类型：期刊论文
| 作者 | Su, HM; He, Y; Kong, FN; Fang, WH; Liu, RZ |
| 刊名 | JOURNAL OF CHEMICAL PHYSICS
 |
| 出版日期 | 2000-08-01 |
| 卷号 | 113期号:5页码:1891-1897 |
| ISSN号 | 0021-9606 |
| 英文摘要 | The photodissociation of formic acid has been studied experimentally and theoretically. Ab initio calculations were performed to study the dissociative profiles of five reaction channels on the S-0, S-1, and T-1 potential energy surfaces. The vibrationally excited nascent products were detected using a time-resolved Fourier transform infrared spectrometer after laser photolysis at 248 or 193 nm. In the 248 nm photolysis, the HCOOH molecule was first excited to the S-1 state, but it was found that the dissociation takes place on the S-0 surface after internal conversion. The products of the vibrationally excited CO, CO2(v(3)) and H2O(v(1)) were detected. During the dissociation process the vibrationally energized molecule is geometrically memorized and dynamically controlled, with the yield preference of CO and H2O over that of CO2 and H-2. The ratio of CO(v greater than or equal to 1)/CO2(v greater than or equal to 1) is estimated as < 7.5. Vibrationally excited CO (v) and CO2(v(3)) are also found in the 193 nm photolysis but the CO/CO2 ratio increases to 11. Most of the dissociation is thought to occur on the S-0 state. At this wavelength another dissociation channel which produces OH and HCO radicals on S-1 surface has been identified. The dissociation is unlikely to occur on the T-1 surface, as the energy barriers are fairly high. (C) 2000 American Institute of Physics. [S0021-9606(00)00620-6]. |
| 语种 | 英语 |
| WOS记录号 | WOS:000088269400030 |
| 出版者 | AMER INST PHYSICS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/76019]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Kong, FN |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China 2.Beijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, HM,He, Y,Kong, FN,et al. Photodissociation of formic acid[J]. JOURNAL OF CHEMICAL PHYSICS,2000,113(5):1891-1897. |
| APA | Su, HM,He, Y,Kong, FN,Fang, WH,&Liu, RZ.(2000).Photodissociation of formic acid.JOURNAL OF CHEMICAL PHYSICS,113(5),1891-1897. |
| MLA | Su, HM,et al."Photodissociation of formic acid".JOURNAL OF CHEMICAL PHYSICS 113.5(2000):1891-1897. |
入库方式： OAI收割
来源：化学研究所
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