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Title: Observing the Structural Evolution in the Photodissociation of Diiodomethane with Femtosecond Solution X-Ray Scattering

Journal Article · · Physical Review Letters
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [3];  [1];  [1]; ORCiD logo [1];  [3];  [1];  [1];  [4];  [4];  [4]; ORCiD logo [5];  [6];  [6];  [7];  [8];  [8];  [4] more »;  [9]; ORCiD logo [5];  [4];  [3]; ORCiD logo [1] « less
  1. Univ. of Gothenburg (Sweden)
  2. Technical Univ. of Denmark, Lyngby (Denmark); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Georg-August-Univ. Göttingen (Germany)
  4. Technical Univ. of Denmark, Lyngby (Denmark)
  5. Lund Univ. (Sweden)
  6. Japan Synchrotron Radiation Research Inst., Hyogo (Japan)
  7. RIKEN SPring-8 Center, Hyogo (Japan)
  8. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  9. Uppsala Univ. (Sweden)

Resolving the structural dynamics of the initial steps of chemical reactions is challenging. We report the femtosecond time-resolved wide-angle x-ray scattering of the photodissociation of diiodomethane in cyclohexane. The data reveal with structural detail how the molecule dissociates into radicals, how the radicals collide with the solvent, and how they form the photoisomer. We extract how translational and rotational kinetic energy is dispersed into the solvent. We also find that 85% of the primary radical pairs are confined to their original solvent cage and discuss how this influences the downstream recombination reactions.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); German Research Foundation (DFG); European Research Council (ERC); USDOE
Grant/Contract Number:
AC02-76SF00515; 279944; 6581802; HU 1971-1/1; HU 1971-3/1; HU 1971-4/1; 2016A8037
OSTI ID:
1724239
Alternate ID(s):
OSTI ID: 1768066
Journal Information:
Physical Review Letters, Vol. 125, Issue 22; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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