@Article{Tetrahedron_44_7335, author = {E. Haselbach and E. Vauthey and P. Suppan}, title = {{Comparison of Photoinduced Electron-Transfer Reactions of Aromatic Carbonyl vs. Cyano-Compounds with Electron Donors in Condensed Phase: the Importance of the Spin State of the Geminate Ion Pair for Obtaining High Ion Yield}}, journal= {Tetrahedron}, ISSN = {0040-4020}, volume= {44}, number= {24}, pages = {7335-7344}, url = {http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6THR-42M7TXM-DC&_user=779890&_handle=V-WA-A-W-WE-MsSAYZW-UUW-U-AAZZYCUADD-AAZVVBUEDD-ECDEZWVZ-WE-U&_fmt=summary&_coverDate=12%2F31%2F1988&_rdoc=1&_orig=browse&_srch=%23toc%235289%231988%23999559975%23238535!&_cdi=5289&_acct=C000043220&_version=1&_urlVersion=0&_userid=779890&md5=a0718d2d5027fb8d1e59587e883f2337}, doi= {10.1016/S0040-4020(01)86228-1}, abstract = {{Photoinduced electron transfer reactions in acetonitrile with bensopheneone, anthraquinone, 9-cyanoanthracene and 9,10-dicyanoanthracene as electron acceptors, and with 1,4-diasabicyclo[2,2,2]octane and N,N-dimethylaniline as electron donors have been studied with ns-laser flash photolysis and fluorescence quenching measurements. For these systems the resulting free ion yield depends on the spin state of the geminate ion pair: its separation is very efficient if formed in a triplet state (carbonyl compounds/donors), while it is very inefficient if formed in a singlet state (cyanoanthracenes/donors). In the triplet systems, geminate back electron transfer is limited by the rate of spin flip.}}, year = {1988} }