Comment on "Engineering coherence among excited states in synthetic heterodimer systems"

Alexei Halpin; Philip J M Johnson; R J Dwayne Miller

doi:10.1126/science.1250926

Comment on "Engineering coherence among excited states in synthetic heterodimer systems"

Science. 2014 Jun 6;344(6188):1099. doi: 10.1126/science.1250926.

Authors

Alexei Halpin¹, Philip J M Johnson¹, R J Dwayne Miller²

Affiliations

¹ Institute for Optical Sciences and Departments of Chemistry and Physics, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada.
² Institute for Optical Sciences and Departments of Chemistry and Physics, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada. Max Planck Institute for the Structure and Dynamics of Matter, Atomically Resolved Dynamics Division, Building 99 (CFEL), Luruper Chaussee 149, 22761 Hamburg, Germany. dwayne.miller@mpsd.mpg.de.

PMID: 24904149
DOI: 10.1126/science.1250926

Abstract

Hayes et al. (Reports, 21 June 2013, p. 1431) used two-dimensional (2D) electronic spectroscopy to study molecular heterodimers and reported a general mechanism for the prolongation of electronic coherences, consistent with previous interpretations of 2D spectra for light-harvesting systems. We argue that the dynamics attributed to electronic coherences are inconclusive based on experimental inconsistencies arising from limited sample characterization and insufficient control measurements.

Publication types

Research Support, Non-U.S. Gov't
Comment

MeSH terms

Electromagnetic Phenomena*
Energy Transfer*
Fluoresceins / chemistry*

Substances

Fluoresceins