Photoswitchable Sensitization of Porphyrin Excited States

Stephen D. Straight; Yuichi Terazono; Gerdenis Kodis; Thomas A. Moore; Ana L. Moore; Devens Gust

doi:10.1071/CH05310

RESEARCH FRONT

Photoswitchable Sensitization of Porphyrin Excited States

Stephen D. Straight ^A , Yuichi Terazono ^A , Gerdenis Kodis ^A , Thomas A. Moore ^A ^B , Ana L. Moore ^A ^B and Devens Gust ^A ^B

+ Author Affiliations

- Author Affiliations

^A Department of Chemistry and Biochemistry, Center for the Study of Early Events in Photosynthesis, Arizona State University, Tempe AZ 85287, USA.

^B Corresponding authors. Email: gust@asu.edu; tom.moore@asu.edu; amoore@asu.edu

Australian Journal of Chemistry 59(3) 170-174 https://doi.org/10.1071/CH05310
Submitted: 17 November 2005 Accepted: 12 January 2006 Published: 24 March 2006

Abstract

Light-driven molecular switches consisting of a porphyrin covalently linked to a fulgimide photochrome antenna have been prepared. Light absorbed by the cyclic form of the fulgimide is transferred to the porphyrin with ≥ 95% efficiency, generating the porphyrin first excited singlet state. Irradiation with visible light photoisomerizes the fulgimide to the open form, which does not absorb above 450 nm, and antenna function is abolished. UV irradiation converts the fulgimide back into the cyclic form, re-establishing efficient energy transfer. Photoisomerization of the fulgimide thus controls generation of the porphyrin excited state, which may then be used to carry out a variety of useful photochemical processes.

Acknowledgments

This work was supported by the US National Science Foundation (CHE-0352599). This is publication 649 from the ASU Center for the Study of Early Events in Photosynthesis.

References

Photoswitchable Sensitization of Porphyrin Excited States

Abstract

Acknowledgments

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