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    Molecular structure induced aggregation effects on the photophysical properties of perylene diimide based multilayer thin films

    Author
    Hu, Guangyu
    View/Open
    179601_Hu_rpi_0185N_11456.pdf (1021.Kb)
    Other Contributors
    Dinolfo, Peter; Tomozawa, Minoru; Ozisik, Rahmi; Ullal, Chaitanya;
    Date Issued
    2019-05
    Subject
    Materials science and engineering
    Degree
    MS;
    Terms of Use
    This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.;
    Metadata
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    URI
    https://hdl.handle.net/20.500.13015/2378
    Abstract
    Two perylene diimides (PDI) were synthesized to enable the preparation of multilayer films through a layer-by-layer (LbL) assembly technique using copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC). Multilayer films were fabricated with Ph-PDI or Pro-PDI (aniline groups or propargyl groups at the diimide positions) as perylene layers and either 1,3,5-tris(azidomethyl)benzene (L1), 1,4-bis(azidomethyl)benzene (L2) or 4,4’-di- azido-2,2’-stilbenedisulfonic acid disodium salt (L3) as linker layers. As shown from UV-Visible absorption and fluorescence spectroscopic studies, among the three linkers, PDIs with L1 displayed linear growth properties and the highest fluorescence intensity. Multilayer films of Pro-PDI with L1 had higher relative fluorescent intensity than that of Ph-PDI. Specular X-ray Reflectivity (XRR) and DFT calculations exhibited a higher tilting angle structure with less density was formed for Pro-PDI multilayer films, indicating more H-type aggregates present for Ph-PDI multilayer films. The achievable tunability of PDIs aggregation and the corresponding fluorescence properties may be illuminating for fabrication of new light harvesting arrays.;
    Description
    May 2019; School of Engineering
    Department
    Dept. of Materials Science and Engineering;
    Publisher
    Rensselaer Polytechnic Institute, Troy, NY
    Relationships
    Rensselaer Theses and Dissertations Online Collection;
    Access
    Restricted to current Rensselaer faculty, staff and students. Access inquiries may be directed to the Rensselaer Libraries.;
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    • RPI Theses Online (Complete)

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