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나노물질 및 화학반응 연구단
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Direct observation of bond formation in solution with femtosecond X-ray scattering Highly Cited Paper

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Title
Direct observation of bond formation in solution with femtosecond X-ray scattering
Author(s)
Kyung Hwan Kim; Jong Goo Kim; Nozawa S.; Sato T.; Key Young Oang; Tae Wu Kim; Hosung Ki; Junbeom Jo; Sungjun Park; Song C.; Sato T.; Ogawa K.; Togashi T.; Tono K.; Yabashi M.; Ishikawa T.; Kim J.; Ryong Ryoo; Kim J.; Hyotcherl Ihee; Adachi S.-I.
Publication Date
2015-02
Journal
NATURE, v.518, no.7539, pp.385 - 389
Publisher
NATURE PUBLISHING GROUP
Abstract
The making and breaking of atomic bonds are essential processes in chemical reactions. Although the ultrafast dynamics of bond breaking have been studied intensively using time-resolved techniques, it is very difficult to study the structural dynamics of bond making, mainly because of its bimolecular nature. It is especially difficult to initiate and follow diffusion-limited bond formation in solution with ultrahigh time resolution. Here we use femtosecond time-resolved X-ray solution scattering to visualize the formation of a gold trimer complex, [Au(CN) 2-[ 3 in real time without the limitation imposed by slow diffusion. This photoexcited gold trimer, which has weakly bound gold atoms in the ground state, undergoes a sequence of structural changes, and our experiments probe the dynamics of individual reaction steps, including covalent bond formation, the bent-to-linear transition, bond contraction and tetramer formation with a time resolution of â 1/4500 femtoseconds. We also determined the three-dimensional structures of reaction intermediates with sub-ångström spatial resolution. This work demonstrates that it is possible to track in detail and in real time the structural changes that occur during a chemical reaction in solution using X-ray free-electron lasers and advanced analysis of time-resolved solution scattering data
URI
https://pr.ibs.re.kr/handle/8788114/1607
ISSN
0028-0836
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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