Dynamics of ultrafast singlet and triplet charge transfer in anthraquinone-DNA conjugates

Frederick D. Lewis; Arun K. Thazhathveetil; Tarek A. Zeidan; Josh Vura-Weis; Michael R. Wasielewski

doi:10.1021/ja908470d

Dynamics of ultrafast singlet and triplet charge transfer in anthraquinone-DNA conjugates

Frederick D. Lewis, Arun K. Thazhathveetil, Tarek A. Zeidan, Josh Vura-Weis, Michael R. Wasielewski

Research output: Contribution to journal › Article › peer-review

Abstract

(Chemical Equation Presented) The efficiency of singlet and triplet charge radical ion-pair formation and the dynamics of radical-pair charge recombination in DNA-anthraquinone conjugates have been investigated by means of femtosecond time-resolved transient absorption spectroscopy. Singlet charge separation is more efficient than intersystem crossing, resulting in inefficient formation of the long-lived triplet radical ion pair. Both singlet charge separation and charge recombination are faster when guanine rather than adenine is the neighboring purine base.

Original language	English (US)
Pages (from-to)	444-445
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	132
Issue number	2
DOIs	https://doi.org/10.1021/ja908470d
State	Published - Jan 20 2010
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
Biochemistry
Catalysis
Colloid and Surface Chemistry

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10.1021/ja908470d

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AU - Zeidan, Tarek A.

AU - Vura-Weis, Josh

AU - Wasielewski, Michael R.

PY - 2010/1/20

Y1 - 2010/1/20

N2 - (Chemical Equation Presented) The efficiency of singlet and triplet charge radical ion-pair formation and the dynamics of radical-pair charge recombination in DNA-anthraquinone conjugates have been investigated by means of femtosecond time-resolved transient absorption spectroscopy. Singlet charge separation is more efficient than intersystem crossing, resulting in inefficient formation of the long-lived triplet radical ion pair. Both singlet charge separation and charge recombination are faster when guanine rather than adenine is the neighboring purine base.

AB - (Chemical Equation Presented) The efficiency of singlet and triplet charge radical ion-pair formation and the dynamics of radical-pair charge recombination in DNA-anthraquinone conjugates have been investigated by means of femtosecond time-resolved transient absorption spectroscopy. Singlet charge separation is more efficient than intersystem crossing, resulting in inefficient formation of the long-lived triplet radical ion pair. Both singlet charge separation and charge recombination are faster when guanine rather than adenine is the neighboring purine base.

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Dynamics of ultrafast singlet and triplet charge transfer in anthraquinone-DNA conjugates

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