A Simple Dyad Exhibiting Microsecond Charge-Separation in Non-Polar Solvents

Kenneth P. Ghiggino; James A. Hutchison; Steven J. Langford; Melissa J. Latter; Marcia A.-P. Lee; Makoto Takezaki

doi:10.1071/CH06011

RESEARCH FRONT

A Simple Dyad Exhibiting Microsecond Charge-Separation in Non-Polar Solvents

Kenneth P. Ghiggino ^A , James A. Hutchison ^A , Steven J. Langford ^B ^D , Melissa J. Latter ^B , Marcia A.-P. Lee ^B and Makoto Takezaki ^A ^C

+ Author Affiliations

- Author Affiliations

^A School of Chemistry, University of Melbourne, Melbourne VIC 3010, Australia.

^B School of Chemistry, Monash University, Melbourne VIC 3800, Australia.

^C Current address: Department of Applied Chemistry, Okayama University of Science, Okayama 700-0005, Japan.

^D Corresponding author. Email: steven.langford@sci.monash.edu.au

Australian Journal of Chemistry 59(3) 179-185 https://doi.org/10.1071/CH06011
Submitted: 20 December 2005 Accepted: 26 February 2006 Published: 24 March 2006

Abstract

A simple photovoltaic device in which two chromophoric components are assembled by Zn–N coordination yields a charge-separated state with microsecond lifetime upon photoexcitation in non-polar solvents. Characterization of the electron transfer dynamics using time-resolved fluorescence and transient absorption spectroscopy suggests that the unusual longevity is due to charge recombination occurring between states with different electron spin character. Control of electron spin may provide a novel paradigm for optimizing light-induced charge-separation processes.

Acknowledgements

This work was supported by the Australian Research Council through the Discovery Grant Scheme (DP0210193). J.A.H. acknowledges an Australian Postgraduate Award from the Australian Government. M.T. acknowledges support from the Okayama University of Science and The Promotion and Mutual Aid Corporation for Private Schools of Japan. Support of the Victorian Institute for Chemical Sciences High Performance Computing Facility is gratefully acknowledged. We thank Andrew Mariotti for assistance with electrochemical measurements and Gary Fallon for assistance in solving the X-ray structure of 1·ZnTPP₂.

References

A Simple Dyad Exhibiting Microsecond Charge-Separation in Non-Polar Solvents

Abstract

Acknowledgements

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