Dynamics of photoinduced charge transfer in Perylene diimide DNA hairpins

ORGN 770

Tarek A. Zeidan, t-zeidan@northwestern.edu1, Richard F. Kelley2, Ra'anan Carmielli2, Michael R. Wasielewski, m-wasielewski@northwestern.edu2, and Frederick D. Lewis, fdl@northwestern.edu1. (1) Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113, (2) Department of Chemistry and Center for Nanotechnology, Northwestern University, 2145 Sheridan Rd, Evanston, IL 60208-3113
For the last decade, our group has been involved in the study of DNA molecular photonics. We have reported the absolute rate constant for charge separation and charge recombination in a series of stable synthetic B-form DNA hairpins capped with chromophores. Recently, our group has shown that a synthetic DNA hairpin structure capped with perylene diimide chromophores (Pdi) form dimeric hairpin structures in aqueous buffer as a consequence of Pdi-Pdi association. Here, we will present the dynamic and mechanism of photoinduced hole transfer through DNA base pair in Pdi-hairpin dimers using femtosecond time-resolved transient-absorption spectroscopy.

 

Physical Organic Chemistry: Calculations, Mechanisms, Photochemistry, and High Energy Species
8:00 AM-12:00 PM, Thursday, March 29, 2007 McCormick Place Lakeside -- Room E451A/B, Level 4, Oral

Division of Organic Chemistry

The 233rd ACS National Meeting, Chicago, IL, March 25-29, 2007