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나노물질 및 화학반응 연구단
나노물질 및 화학반응 연구단
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Solvent-dependent complex reaction pathways of bromoform revealed by time-resolved X-ray solution scattering and X-ray transient absorption spectroscopy

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Title
Solvent-dependent complex reaction pathways of bromoform revealed by time-resolved X-ray solution scattering and X-ray transient absorption spectroscopy
Author(s)
Qingyu Kong; Dmitry Khakhulin; Ilya A. Shkrob; Jae Hyuk Lee; Xiaoyi Zhang; Jeongho Kim; Kyung Hwan Kim; Junbeom Jo; Jungmin Kim; Jaedong Kang; Van-Thai Pham; Guy Jennings; Charles Kurtz; Rick Spence; Lin X. Chen; Michael Wulff; Hyotcherl Ihee
Publication Date
2019-11
Journal
STRUCTURAL DYNAMICS, v.6, no.6, pp.064902 -
Publisher
AMER INST PHYSICS
Abstract
© 2019 Author(s).The photochemical reaction pathways of CHBr3 in solution were unveiled using two complementary X-ray techniques, time-resolved X-ray solution scattering (TRXSS) and X-ray transient absorption spectroscopy, in a wide temporal range from 100 ps to tens of microseconds. By performing comparative measurements in protic (methanol) and aprotic (methylcyclohexane) solvents, we found that the reaction pathways depend significantly on the solvent properties. In methanol, the major photoproducts are CH3OCHBr2 and HBr generated by rapid solvolysis of iso-CHBr2-Br, an isomer of CHBr3. In contrast, in methylcyclohexane, iso-CHBr2-Br returns to CHBr3 without solvolysis. In both solvents, the formation of CHBr2 and Br is a competing reaction channel. From the structural analysis of TRXSS data, we determined the structures of key intermediate species, CH3OCHBr2 and iso-CHBr2-Br in methanol and methylcyclohexane, respectively, which are consistent with the structures from density functional theory calculations
URI
https://pr.ibs.re.kr/handle/8788114/6819
ISSN
2329-7778
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
Struct. Dyn. 6, 064902 (2019).pdfDownload

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