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  1. AU="Thai, Linh Duy"
  2. AU=Walker Scott C
  3. AU="Sheridan, Katherine"
  4. AU="Brown, Sharlie B"
  5. AU=Walker Kathleen
  6. AU="Miller, Donald G"
  7. AU="Sendino, O"
  8. AU="Rao, Arya"
  9. AU="Wong, Gary K W"

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  1. Artikel: Photo- and halochromism of spiropyran-based main-chain polymers.

    Thai, Linh Duy / Kammerer, Jochen A / Mutlu, Hatice / Barner-Kowollik, Christopher

    Chemical science

    2024  Band 15, Heft 10, Seite(n) 3687–3697

    Abstract: Advanced functional polymeric materials based on spiropyrans (SPs) feature multi-stimuli responsive characteristics, such as a change in color with exposure to light (photochromism) or acids (halochromism). The inclusion of stimuli-responsive molecules ... ...

    Abstract Advanced functional polymeric materials based on spiropyrans (SPs) feature multi-stimuli responsive characteristics, such as a change in color with exposure to light (photochromism) or acids (halochromism). The inclusion of stimuli-responsive molecules in general - and SPs in particular - as main-chain repeating units is a scarcely explored macromolecular architecture compared to side chain responsive polymers. Herein, we establish the effects of substitution patterns on SPs within a homopolymer main-chain synthesized
    Sprache Englisch
    Erscheinungsdatum 2024-01-26
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2559110-1
    ISSN 2041-6539 ; 2041-6520
    ISSN (online) 2041-6539
    ISSN 2041-6520
    DOI 10.1039/d3sc06383f
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Access to Main-Chain Photoswitching Polymers via Hydroxyl-yne Click Polymerization.

    Thai, Linh Duy / Kammerer, Jochen A / Théato, Patrick / Mutlu, Hatice / Barner-Kowollik, Christopher

    ACS macro letters

    2024  , Seite(n) 681–687

    Abstract: Main-chain stimuli-responsive polymers synthesized via polymerization techniques that do not rely on metal-based catalysis are highly desirable for economic reasons and to avoid metal-polymer interactions. Herein, we introduce a metal-free head-to-tail ... ...

    Abstract Main-chain stimuli-responsive polymers synthesized via polymerization techniques that do not rely on metal-based catalysis are highly desirable for economic reasons and to avoid metal-polymer interactions. Herein, we introduce a metal-free head-to-tail organobase-catalyzed hydroxyl-yne click polymerization of an AB-type monomer to realize photoswitchable polymers featuring α-bismines as main-chain repeating units. The prepared main-chain α-bisimine-based polymers show excellent photoswitching in solution. We further post-functionalize the obtained polymers with various thiol compounds via thiol-Michael reactions to significantly lower the glass transition temperature (
    Sprache Englisch
    Erscheinungsdatum 2024-05-16
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 2161-1653
    ISSN (online) 2161-1653
    DOI 10.1021/acsmacrolett.4c00216
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Molecular Photoswitching of Main-Chain α-Bisimines in Solid-State Polymers.

    Thai, Linh Duy / Guimaraes, Thiago R / Chambers, Lewis C / Kammerer, Jochen A / Golberg, Dmitri / Mutlu, Hatice / Barner-Kowollik, Christopher

    Journal of the American Chemical Society

    2023  Band 145, Heft 27, Seite(n) 14748–14755

    Abstract: Photoisomerization of chromophores usually shows significantly less efficiency in solid polymers than in solution as strong intermolecular interactions lock their conformation. Herein, we establish the impact of macromolecular architecture on the ... ...

    Abstract Photoisomerization of chromophores usually shows significantly less efficiency in solid polymers than in solution as strong intermolecular interactions lock their conformation. Herein, we establish the impact of macromolecular architecture on the isomerization efficiency of main-chain-incorporated chromophores (i.e., α-bisimine) in both solution and the solid state. We demonstrate that branched architectures deliver the highest isomerization efficiency for the main-chain chromophore in the solid state─remarkably as high as 70% compared to solution. The macromolecular design principles established herein for efficient solid-state photoisomerization can serve as a blueprint for enhancing the solid-state isomerization efficiency for other polymer systems, such as those based on azobenzenes.
    Sprache Englisch
    Erscheinungsdatum 2023-06-28
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.3c03242
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Main-chain Macromolecular Hydrazone Photoswitches.

    Thai, Linh Duy / Fanelli, Julian / Munaweera, Rangika / O'Mara, Megan L / Barner-Kowollik, Christopher / Mutlu, Hatice

    Angewandte Chemie (International ed. in English)

    2023  Band 63, Heft 4, Seite(n) e202315887

    Abstract: Hydrazones-consisting of a dynamic imine bond and an acidic NH proton-have recently emerged as versatile photoswitches underpinned by their ability to form thermally bistable isomers, (Z) and (E), respectively. Herein, we introduce two photoresponsive ... ...

    Abstract Hydrazones-consisting of a dynamic imine bond and an acidic NH proton-have recently emerged as versatile photoswitches underpinned by their ability to form thermally bistable isomers, (Z) and (E), respectively. Herein, we introduce two photoresponsive homopolymers containing structurally different hydrazones as main-chain repeating units, synthesized via head-to-tail Acyclic Diene METathesis (ADMET) polymerization. Their key difference lies in the hydrazone design, specifically the location of the aliphatic arm connecting the rotor of the hydrazone photoswitch to the aliphatic polymer backbone. Critically, we demonstrate that their main photoresponsive property, i.e., their hydrodynamic volume, changes in opposite directions upon photoisomerization (λ=410 nm) in dilute solution. Further, the polymers-independent of the design of the individual hydrazone monomer-feature a photoswitchable glass transition temperature (T
    Sprache Englisch
    Erscheinungsdatum 2023-12-20
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202315887
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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