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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-248 |
| Subject |
Photoinduced bond formation reaction dynamics of silver dicyanide (Ag(CN)2) by time-resolved X-ray liquidography (TRXL) |
| Authors |
Seonggon Lee, Hyotcherl Ihee*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
|
| Abstract |
Direct observation of bond formation has been long-cherished grudge for physical chemists due to its fundamental implication in understanding chemical reactions. In this article, based on time-resolved X-ray liquidography (TRXL) technique, I analyzed photoinduced bond formation dynamics of Ag(CN)2 under water solvent. Kinetic analysis of difference X-ray scattering data revealed that, under 267-nm laser excitation, silver dicyanide complex sequentially forms singlet trimer (S1) and trimer (T1) within 169 fs and 1.38 ps, respectively. This trimer complex slowly converts into tetramer with the time constant of 335 ps, and then restores to the ground state in 177 ns. We were also able to extract four species-associated curves (SAC), which conceals structural information of each intermediate, from singular value decomposition (SVD) and related kinetic analysis. Combined structure fit of SACs regarding Debye scattering equation, solute-solvent cage contribution, and solvent heat experiment will reveal exact structural dynamics in the future. |
| E-mail |
infinite_l@kaist.ac.kr |
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121st General Meeting of the KCS