Mass-dependent isotopic fractionation in ozone produced by electrolysis

S. K. Bhattacharya, Joel Savarino, Boaz Luz

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

During the electrolysis of water in an acidified medium, ozone is produced, in association with oxygen, at the anode. This ozone is found to be depleted in heavy isotopes (18O and 17O), with respect to the source water, following a strict mass-dependent rule. Our experiments also suggest that the isotopes are distributed at the apex and base positions of the bent ozone molecule in a random fashion, without obeying the zero-point energy constraint. Endowed with these characteristics, the electrolytic ozone provides a source of reference that has a known internal heavy isotope distribution for spectroscopic studies. In addition, this ozone, when subjected to photolytic decomposition, can be used as a source of atomic oxygen with mass-dependent isotope ratios that can be varied by simply changing the water composition. Such an oxygen source is important for studying isotope effects in gas-phase recombination/exchange reactions such as COO + O* → [COOO*] → COO* + O.

Original languageEnglish
Pages (from-to)5226-5232
Number of pages7
JournalAnalytical Chemistry
Volume81
Issue number13
DOIs
StatePublished - 1 Jul 2009

Fingerprint

Dive into the research topics of 'Mass-dependent isotopic fractionation in ozone produced by electrolysis'. Together they form a unique fingerprint.

Cite this