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Direct Observation of a Transiently Formed Isomer during Iodoform Photolysis in Solution by Time-Resolved X-ray Liquidography

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Title
Direct Observation of a Transiently Formed Isomer during Iodoform Photolysis in Solution by Time-Resolved X-ray Liquidography
Author(s)
Chi Woo Ahn; Hosung Ki; Joonghan Kim; Jeongho Kim; Sungjun Park; Yunbeom Lee; Kyung Hwan Kim; Qingyu Kong; Jiwon Moon; Martin Nors Pedersen; Michael Wulff; Hyotcherl Ihee
Publication Date
2018-02
Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.9, no.3, pp.647 - 653
Publisher
AMER CHEMICAL SOC
Abstract
Photolysis of iodoform (CHI3) in solution has been extensively studied, but its reaction mechanism remains elusive. In particular, iso-iodoform (iso-CHI2-I) is formed as a product of the photolysis reaction, but its detailed structure is not known, and whether it is a major intermediate species has been controversial. Here, by using time-resolved X-ray liquidography, we determined the reaction mechanism of CHI3 photodissociation in cyclohexane as well as the structure of iso-CHI2-I. Both iso-CHI2-I and CHI2 radical were found to be formed within 100 ps with a branching ratio of 40:60. Iodine radicals (I), formed during the course of CHI3 photolysis, recombine nongeminately with either CHI2 or I. Based on our structural analysis, the I-I distance and the C-I-I angle of iso-CHI2-I were determined to be 2.922 ± 0.004 Å and 133.9 ± 0.8°, respectively. © 2018 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/4660
DOI
10.1021/acs.jpclett.7b03125
ISSN
1948-7185
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
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