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|
| Type |
Poster Presentation |
| Area |
Physical Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
PHYS.P-198 |
| Subject |
Structural Determination of a Transient Isomer of CH2I2 by Time-resolved X-ray Solution Scattering |
| Authors |
Sungjun Park, Hyotcherl Ihee*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
|
| Abstract |
We have investigated the structural dynamics of photolysis of CH2I2 in methanol solution by using time-resolved X-ray solution scattering. Reaction mechanism of photolysis of CH2I2 were elucidated with high accuracy at both short and long time delays. Upon 267 nm photoexcitation, CH2I2 rapidly dissociates via both radical and isomer pathways with a 45:55 branching ratio. After 300 ps, iso-CH2I-I is converted into CH2I + I or CH2I2, and at the same time iodine radical undergoes non-geminate recombination and electron transfer with surrounding methanol molecules. At longer time delays, CH2I radical and I2- ion are dominant reaction intermediates. With the aid of time-resolved X-ray solution scattering technique, we established accurate and detailed reaction mechanism of photolysis of CH2I2 in methanol. In addition, detailed structural dynamics for the changes in the solvent temperature and density as a function of time were also revealed. |
| E-mail |
mnb0707@gmail.com |
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121st General Meeting of the KCS