1391420-84-0Relevant articles and documents
Fast photodriven electron spin coherence transfer: A quantum gate based on a spin exchange J-jump
Kobr, Lukas,Gardner, Daniel M.,Smeigh, Amanda L.,Dyar, Scott M.,Karlen, Steven D.,Carmieli, Raanan,Wasielewski, Michael R.
, p. 12430 - 12433 (2012)
Photoexcitation of the electron donor (D) within a linear, covalent donor-acceptor-acceptor molecule (D-A1-A2) in which A 1 = A2 results in sub-nanosecond formation of a spin-coherent singlet radical ion pair state, 1(D+?- A1-?-A2), for which the spin-spin exchange interaction is large: 2J = 79 ± 1 mT. Subsequent laser excitation of A1-? during the lifetime of 1(D +?-A1-?-A2) rapidly produces 1(D+?-A1-A2 -?), which abruptly decreases 2J 3600-fold. Subsequent coherent spin evolution mixes 1(D+?-A1-A 2-?) with 3(D+?-A 1-A2-?), resulting in mixed states which display transient spin-polarized EPR transitions characteristic of a spin-correlated radical ion pair. These photodriven J-jump experiments show that it is possible to use fast laser pulses to transfer electron spin coherence between organic radical ion pairs and observe the results using an essentially background-free time-resolved EPR experiment.