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dc.contributor.authorMasih, Dilshad
dc.contributor.authorAly, Shawkat Mohammede
dc.contributor.authorUsman, Anwar
dc.contributor.authorAlarousu, Erkki
dc.contributor.authorMohammed, Omar F.
dc.date.accessioned2015-08-25T06:19:11Z
dc.date.available2015-08-25T06:19:11Z
dc.date.issued2015
dc.identifier.issn1463-9076
dc.identifier.issn1463-9084
dc.identifier.pmid25751714
dc.identifier.doi10.1039/c4cp06050d
dc.identifier.urihttp://hdl.handle.net/10754/575910
dc.description.abstractWe report on the ultrafast interfacial electron transfer ( ET) between zinc( II) porphyrin ( ZnTMPyP) and negatively charged graphene carboxylate ( GC) using state- of- the- art femtosecond laser spectroscopy with broadband capabilities. The steady- state interaction between GC and ZnTMPyP results in a red- shifted absorption spectrum, providing a clear indication for the binding affinity between ZnTMPyP and GC via electrostatic and p- p stacking interactions. Ultrafast transient absorption ( TA) spectra in the absence and presence of three different GC concentrations reveal ( i) the ultrafast formation of singlet excited ZnTMPyP*, which partially relaxes into a long- lived triplet state, and ( ii) ET from the singlet excited ZnTMPyP* to GC, forming ZnTMPyP + and GC , as indicated by a spectral feature at 650- 750 nm, which is attributed to a ZnTMPyP radical cation resulting from the ET process.
dc.publisherRoyal Society of Chemistry (RSC)
dc.titleReal-time observation of ultrafast electron injection at graphene–Zn porphyrin interfaces
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.journalPhys. Chem. Chem. Phys.
kaust.personMasih, Dilshad
kaust.personUsman, Anwar
kaust.personAly, Shawkat Mohammede
kaust.personAlarousu, Erkki
kaust.personMohammed, Omar F.


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