4.6 Article

Steric Enhancement of the Chemiluminescence of Luminols

Journal

CHEMISTRY-A EUROPEAN JOURNAL
Volume 21, Issue 28, Pages 9975-9979

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201500798

Keywords

ab initio calculations; chemiluminescence; conical intersections; luminols; steric gearing

Funding

  1. Spanish MICINN/FEDER [CTQ2014-59650-P]
  2. EU [PIEF-GA-2013-625064]
  3. Humboldt Foundation of the DFG

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A surprising 20-fold increase in chemiluminescence efficiency was observed for dialkyl luminol derivatives in comparison with the parent compound. This effect could be a direct consequence of steric gearing which facilitates the transition from the intermediate endoperoxide to the electronically excited phthalate. Mechanistic aspects of this process have been supported by computational calculations (CASPT2//CASSCF).

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