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Linking Single‐Molecule Blinking to Chromophore Structure and Redox Potentials
Author(s) -
Stein Ingo H.,
Capone Stella,
Smit Jochem H.,
Baumann Fabian,
Cordes Thorben,
Tinnefeld Philip
Publication year - 2012
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201100820
Subject(s) - chromophore , redox , chemistry , photochemistry , ascorbic acid , ion , oxygen , molecule , inorganic chemistry , organic chemistry , food science
Intensity fluctuations between an ON‐state and an OFF‐state, also called blinking, are common to all luminescent objects when studied at the level of individuals. We studied blinking of three dyes from a homologous series (Cy3, Cy5, Cy7). The underlying radical anion states were induced by removing oxidants (i.e. oxygen) and by adding the reductant ascorbic acid. We find that for different conditions with distinct levels of oxidants in solution the OFF‐state lifetime always increases in the order Cy3