Probing Single-molecule Interfacial Electron Transfer Dynamics Of Porphyrin On Tio2 Nanoparticles

Author(s)

Yuanmin Wang
Xuefei Wang
Sujit Kumar Ghosh
H. Peter Lu, Bowling Green State UniversityFollow

Document Type

Article

Abstract

Single-molecule interfacial electron transfer (ET) dynamics has been studied by using single-molecule fluorescence spectroscopy and microscopic imaging. For a single-molecule zinc-tetra (4-carboxyphenyl) porphyrin (ZnTCPP)/TiO2 nanoparticle system, the single-molecule fluorescence trajectories show strong fluctuation and blinking between bright and dark states. The intermittency and fluctuation of the single-molecule fluorescence are attributed to the variation of the reactivity of interfacial electron transfer. The nonexponential autocorrelation function and the power-law distribution of the probability density of dark times imply the dynamic and static inhomogeneities of the interfacial ET dynamics. On the basis of the power-law analysis, the variation of single-molecule interfacial ET reactivity is analyzed as a fluctuation according to the Levy statistics.

Copyright Statement

Publisher PDF

Repository Citation

Wang, Yuanmin; Wang, Xuefei; Ghosh, Sujit Kumar; and Lu, H. Peter, "Probing Single-molecule Interfacial Electron Transfer Dynamics Of Porphyrin On Tio2 Nanoparticles" (2009). Chemistry Faculty Publications. 104.
https://scholarworks.bgsu.edu/chem_pub/104

Publication Date

2-2009

Publication Title

Journal Of The American Chemical Society

DOI

https://doi.org/10.1021/ja806988d

Start Page No.

1479

End Page No.

1487