TY - JOUR
T1 - Single-molecule interfacial electron transfer in donor-bridge-nanoparticle acceptor complexes
AU - Jin, Shengye
AU - Snoeberger, Robert C.
AU - Issac, Abey
AU - Stockwell, David
AU - Batista, Victor S.
AU - Lian, Tianquan
PY - 2010/12/8
Y1 - 2010/12/8
N2 - Photoinduced interfacial electron transfer (IET) in sulforhodamine B (SRhB)-aminosilane-Tin oxide (SnO2) nanoparticle donor-bridge- acceptor complexes has been studied on a single molecule and ensemble average level. On both SnO2 and ZrO2, the sum of single molecule fluorescence decays agree with the ensemble average results, suggesting complete sampling of molecules under single molecule conditions. Shorter fluorescence lifetime on SnO2 than on ZrO2 is observed and attributed to IET from SRhB to SnO2. Single molecule lifetimes fluctuate with time and vary among different molecules, suggesting both static and dynamic IET heterogeneity in this system. Computational modeling of the complexes shows a distribution of molecular conformation, leading to a distribution of electronic coupling strengths and ET rates. It is likely that the conversion between these conformations led to the fluctuation of ET rate and fluorescence lifetime on the single molecule level.
AB - Photoinduced interfacial electron transfer (IET) in sulforhodamine B (SRhB)-aminosilane-Tin oxide (SnO2) nanoparticle donor-bridge- acceptor complexes has been studied on a single molecule and ensemble average level. On both SnO2 and ZrO2, the sum of single molecule fluorescence decays agree with the ensemble average results, suggesting complete sampling of molecules under single molecule conditions. Shorter fluorescence lifetime on SnO2 than on ZrO2 is observed and attributed to IET from SRhB to SnO2. Single molecule lifetimes fluctuate with time and vary among different molecules, suggesting both static and dynamic IET heterogeneity in this system. Computational modeling of the complexes shows a distribution of molecular conformation, leading to a distribution of electronic coupling strengths and ET rates. It is likely that the conversion between these conformations led to the fluctuation of ET rate and fluorescence lifetime on the single molecule level.
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U2 - 10.1021/jp911662g
DO - 10.1021/jp911662g
M3 - Article
C2 - 20225886
AN - SCOPUS:78449280126
VL - 114
SP - 14309
EP - 14319
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
SN - 1520-6106
IS - 45
ER -