TY - JOUR
T1 - Single molecule studies of calix[4]arene-linked perylene bisimide dimers
T2 - Relationship between blinking, lifetime and/or spectral fluctuations
AU - Issac, Abey
AU - Hildner, Richard
AU - Ernst, Dominique
AU - Hippius, Catharina
AU - Würthner, Frank
AU - Köhler, Jürgen
PY - 2012/8/14
Y1 - 2012/8/14
N2 - We recorded fluorescence time traces, and simultaneously either the fluorescence lifetime or the emission spectra from single perylene bisimide (PBI) dimers embedded in a polystyrene matrix. In these traces three distinct intensity levels can be distinguished, which reflect the photo-induced radicalisation of one of the perylene subunits. Differences in the energy transfer rate between the neutral PBI and the reversibly formed radical anion give rise to variations in the chronological order of the appearance of the intensity levels, which allowed us to categorise the time traces into three distinct groups: Type 1 blinking corresponds to a high energy transfer rate, type 2 blinking to fluctuations between large and small transfer rates (dynamic quenching), and type 3 blinking results from small energy transfer rates together with Coulomb blockade. The information that we obtain from the distributions of the fluorescence lifetimes at the various signal levels allows us to relate these differences to properties of the local polymer environment of the dimers.
AB - We recorded fluorescence time traces, and simultaneously either the fluorescence lifetime or the emission spectra from single perylene bisimide (PBI) dimers embedded in a polystyrene matrix. In these traces three distinct intensity levels can be distinguished, which reflect the photo-induced radicalisation of one of the perylene subunits. Differences in the energy transfer rate between the neutral PBI and the reversibly formed radical anion give rise to variations in the chronological order of the appearance of the intensity levels, which allowed us to categorise the time traces into three distinct groups: Type 1 blinking corresponds to a high energy transfer rate, type 2 blinking to fluctuations between large and small transfer rates (dynamic quenching), and type 3 blinking results from small energy transfer rates together with Coulomb blockade. The information that we obtain from the distributions of the fluorescence lifetimes at the various signal levels allows us to relate these differences to properties of the local polymer environment of the dimers.
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U2 - 10.1039/c2cp41250k
DO - 10.1039/c2cp41250k
M3 - Article
C2 - 22751652
AN - SCOPUS:84863943680
SN - 1463-9076
VL - 14
SP - 10789
EP - 10798
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
IS - 30
ER -