Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 120, Issue 37, Pages 7294-7300Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpca.6b08405
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Funding
- National Science Foundation [CHE-1055397, DMR-1212842]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1212842] Funding Source: National Science Foundation
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The triplet excited-state formation efficiency in a flavin derivative was increased by the introduction of iodine into the molecular framework. The transient absorption measurements showed that the intersystem crossing rate was 1.1 X 10(10) s(-1) significantly faster than in the parent flavin compound. Furthermore, the photocatalytic efficiency of iodoflavin was evaluated using the oxidation of benzyl alcohol as a model reaction. The benzaldehyde product yields were higher when iodoflavin was used as a photocatalyst, showing that the increased triplet yield directly translates into improved photocatalysis. The iodoflavin catalyst also allowed the use of higher substrate concentrations (since the undesired electron transfer from singlet excited state was minimized), which is expected to improve the practical aspects of photocatalysis by flavins.
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