• Login
    View Item 
    •   Home
    • Research
    • Articles
    • View Item
    •   Home
    • Research
    • Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of KAUSTCommunitiesIssue DateSubmit DateThis CollectionIssue DateSubmit Date

    My Account

    Login

    Quick Links

    Open Access PolicyORCID LibguidePlumX LibguideSubmit an Item

    Statistics

    Display statistics

    Ultrafast Photoinduced Electron Transfer in a π-Conjugated Oligomer/Porphyrin Complex

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Type
    Article
    Authors
    Aly, Shawkat Mohammede cc
    Goswami, Subhadip
    Alsulami, Qana cc
    Schanze, Kirk S.
    Mohammed, Omar F. cc
    KAUST Department
    Chemical Science Program
    KAUST Solar Center (KSC)
    Physical Science and Engineering (PSE) Division
    Ultrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
    Date
    2014-09-18
    Online Publication Date
    2014-09-18
    Print Publication Date
    2014-10-02
    Permanent link to this record
    http://hdl.handle.net/10754/594103
    
    Metadata
    Show full item record
    Abstract
    Controlling charge transfer (CT), charge separation (CS), and charge recombination (CR) at the donor-acceptor interface is extremely important to optimize the conversion efficiency in solar cell devices. In general, ultrafast CT and slow CR are desirable for optimal device performance. In this Letter, the ultrafast excited-state CT between platinum oligomer (DPP-Pt(acac)) as a new electron donor and porphyrin as an electron acceptor is monitored for the first time using femtosecond (fs) transient absorption (TA) spectroscopy with broad-band capability and 120 fs temporal resolution. Turning the CT on/off has been shown to be possible either by switching from an organometallic oligomer to a metal-free oligomer or by controlling the charge density on the nitrogen atom of the porphyrin meso unit. Our time-resolved data show that the CT and CS between DPP-Pt(acac) and cationic porphyrin are ultrafast (approximately 1.5 ps), and the CR is slow (ns time scale), as inferred from the formation and the decay of the cationic and anionic species. We also found that the metallic center in the DPP-Pt(acac) oligomer and the positive charge on the porphyrin are the keys to switching on/off the ultrafast CT process.
    Citation
    Aly SM, Goswami S, Alsulami QA, Schanze KS, Mohammed OF (2014) Ultrafast Photoinduced Electron Transfer in a π-Conjugated Oligomer/Porphyrin Complex. The Journal of Physical Chemistry Letters 5: 3386–3390. Available: http://dx.doi.org/10.1021/jz5018174.
    Sponsors
    S.M.A. is grateful for the postdoctoral fellowship provided by Saudi Basic Industries Corporation (SABIC). The work reported here was supported by the King Abdullah University of Science and Technology. Work at the University of Florida was supported by the U.S. National Science Foundation (Grant No. CHE-115164).
    Publisher
    American Chemical Society (ACS)
    Journal
    The Journal of Physical Chemistry Letters
    DOI
    10.1021/jz5018174
    PubMed ID
    26278449
    ae974a485f413a2113503eed53cd6c53
    10.1021/jz5018174
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Solar Center (KSC)

    entitlement

    Related articles

    • Energy and electron transfer in beta-alkynyl-linked porphyrin-[60]fullerene dyads.
    • Authors: Vail SA, Schuster DI, Guldi DM, Isosomppi M, Tkachenko N, Lemmetyinen H, Palkar A, Echegoyen L, Chen X, Zhang JZ
    • Issue date: 2006 Jul 27
    • Molecular-structure Control of Ultrafast Electron Injection at Cationic Porphyrin-CdTe Quantum Dot Interfaces.
    • Authors: Aly SM, Ahmed GH, Shaheen BS, Sun J, Mohammed OF
    • Issue date: 2015 Mar 5
    • Ultrafast photoinduced charge transport in Pt(II) donor-acceptor assembly bearing naphthalimide electron acceptor and phenothiazine electron donor.
    • Authors: Sazanovich IV, Best J, Scattergood PA, Towrie M, Tikhomirov SA, Bouganov OV, Meijer AJ, Weinstein JA
    • Issue date: 2014 Dec 21
    • Ultrafast relaxation dynamics of 5,10,15,20-meso-tetrakis pentafluorophenyl porphyrin studied by fluorescence up-conversion and transient absorption spectroscopy.
    • Authors: Kumar PH, Venkatesh Y, Siva D, Ramakrishna B, Bangal PR
    • Issue date: 2015 Feb 26
    • Electron transfer dynamics and excited state branching in a charge-transfer platinum(II) donor-bridge-acceptor assembly.
    • Authors: Scattergood PA, Delor M, Sazanovich IV, Bouganov OV, Tikhomirov SA, Stasheuski AS, Parker AW, Greetham GM, Towrie M, Davies ES, Meijer AJ, Weinstein JA
    • Issue date: 2014 Dec 21
    DSpace software copyright © 2002-2021  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service hosted by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items. For anonymous users the allowed maximum amount is 50 search results.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.