dc.contributor.author | Kaiwar, Sharada | en_US |
dc.contributor.author | Vodacek, Anthony | en_US |
dc.contributor.author | Blough, Neil | en_US |
dc.contributor.author | Pilato, Robert | en_US |
dc.date.accessioned | 2007-07-05T15:46:45Z | en_US |
dc.date.available | 2007-07-05T15:46:45Z | en_US |
dc.date.issued | 1997-04-09 | en_US |
dc.identifier.citation | Journal of the American Chemical Society 119N14 (1997) 3311-3316 | en_US |
dc.identifier.issn | 0002-7863 | en_US |
dc.identifier.uri | http://hdl.handle.net/1850/4362 | en_US |
dc.description | RIT community members may access full-text via RIT Libraries licensed databases: http://library.rit.edu/databases/ | |
dc.description.abstract | The complexes (dppe)M{S2C2(2-quinoxaline)(R)}, where dppe = (diphenylphosphinoethane, M = Ni,
Pd, and Pt, and R = H and Me, have as their lowest-energy band an intraligand charge transfer transition (ILCT).
Excitation of deaerated solutions of (dppe)Pt{S2C2(2-quinoxaline)(R)} lead to emissions from an 1ILCT* and an
3ILCT*. The lifetimes of these excited states (ô) and the quantum yields for the emissions ( ) for (dppe)Pt{S2C2(2-
quinoxaline)(H)} in CH3CN are 1ô = 0.16 ns,1 () = 0.005 and 3ô = 3.3, 3 () = 0.01, respectively. The 3ILCT* of
these quinoxaline-substituted complexes can undergo a diverse suite of excited state reactions, including electron,
proton, and hydrogen atom transfers. The second order rate constants (kq) for the quenching of the 3ILCT* emission
by acids increases with the thermodynamic driving force for the excited state proton transfer, an observation consistent
with excited state electron and hydrogen atom transfers. Dihydroquinone and p-methoxyphenol are substantially
better quenching agents than excited state proton transfer would predict and thermodynamic calculations suggest
that they quench the 3ILCT* by hydrogen atom transfer (Refer to PDF file for exact formulas). | en_US |
dc.description.sponsorship | We are indebted to the American Chemical
Society, Petroleum Research Fund (grant no. 28499-G3),
the Exxon Education Foundation, and the Office of the Naval
Research (N00014-95-10201) for supporting this work. | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | American Chemical Society (ACS) | en_US |
dc.relation.ispartofseries | vol. 119 | en_US |
dc.relation.ispartofseries | no. 4 | en_US |
dc.title | Excited state properties of Quinoxaline-substituted Platinum 1,2-Enedithiolates | en_US |
dc.type | Article | en_US |
dc.identifier.url | http://dx.doi.org/10.1021/ja9626998 | |