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dc.contributor.authorAlsulami, Qana
dc.contributor.authorAly, Shawkat Mohammede
dc.contributor.authorGoswami, Subhadip
dc.contributor.authorAlarousu, Erkki
dc.contributor.authorUsman, Anwar
dc.contributor.authorSchanze, Kirk S.
dc.contributor.authorMohammed, Omar F.
dc.date.accessioned2015-06-28T13:31:42Z
dc.date.available2015-06-28T13:31:42Z
dc.date.issued2015-07-07
dc.identifier.citationUltrafast Excited-State Dynamics of Diketopyrrolopyrrole (DPP)-Based Materials: Static versus Diffusion-Controlled Electron Transfer Process 2015:150625161622008 The Journal of Physical Chemistry C
dc.identifier.issn1932-7447
dc.identifier.issn1932-7455
dc.identifier.doi10.1021/acs.jpcc.5b03905
dc.identifier.urihttp://hdl.handle.net/10754/558582
dc.description.abstractSinglet-to-triplet intersystem crossing (ISC) and photoinduced electron transfer (PET) of platinum(II) containing diketopyrrolopyrrole (DPP) oligomer in the absence and presence of strong electron-acceptor tetracyanoethylene (TCNE) were investigated using femtosecond and nanosecond transient absorption spectroscopy with broadband capabilities. The role of platinum(II) incorporation in those photophysical properties was evaluated by comparing the excited-state dynamics of DPP with and without the metal centers. The steady-state measurements reveal that platinum(II) incorporation facilitates dramatically the interactions between DPP-Pt(acac) and TCNE, resulting in charge transfer (CT) complex formation. The transient absorption spectra in the absence of TCNE reveal ultrafast ISC of DPP-Pt(acac) followed by their long-lived triplet state. In the presence of TCNE, PET from the excited DPP-Pt(acac) and DPP to TCNE, forming the radical ion pairs. The ultrafast PET which occurs statically from DPP-Pt(acac) to TCNE in picosecond regime, is much faster than that from DPP to TCNE (nanosecond time scale) which is diffusion-controlled process, providing clear evidence that PET rate is eventually controlled by the platinum(II) incorporation.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b03905
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b03905.
dc.titleUltrafast Excited-State Dynamics of Diketopyrrolopyrrole (DPP)-Based Materials: Static versus Diffusion-Controlled Electron Transfer Process
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentUltrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
dc.identifier.journalThe Journal of Physical Chemistry C
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Chemistry, University of Florida, P.O . Box 117200, Gainesville, Florida 32611, United States
kaust.personAly, Shawkat Mohammede
kaust.personAlarousu, Erkki
kaust.personUsman, Anwar
kaust.personMohammed, Omar F.
kaust.personAlsulami, Qana
refterms.dateFOA2016-06-25T00:00:00Z
dc.date.published-online2015-07-07
dc.date.published-print2015-07-16


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