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dc.contributor.authorZhang, Zhen
dc.contributor.authorBilalis, Panagiotis
dc.contributor.authorZhang, Hefeng
dc.contributor.authorGnanou, Yves
dc.contributor.authorHadjichristidis, Nikos
dc.date.accessioned2017-06-14T12:17:32Z
dc.date.available2017-06-14T12:17:32Z
dc.date.issued2017-05-19
dc.identifier.citationZhang Z, Bilalis P, Zhang H, Gnanou Y, Hadjichristidis N (2017) Core Cross-Linked Multiarm Star Polymers with Aggregation-Induced Emission and Temperature Responsive Fluorescence Characteristics. Macromolecules 50: 4217–4226. Available: http://dx.doi.org/10.1021/acs.macromol.7b00506.
dc.identifier.issn0024-9297
dc.identifier.issn1520-5835
dc.identifier.doi10.1021/acs.macromol.7b00506
dc.identifier.urihttp://hdl.handle.net/10754/624999
dc.description.abstractAggregation-induced emission (AIE) active core cross-linked multiarm star polymers, carrying polystyrene (PS), polyethylene (PE), or polyethylene-b-polycaprolactone (PE-b-PCL) arms, have been synthesized through an “arm-first” strategy, by atom transfer radical copolymerization (ATRP) of a double styrene-functionalized tetraphenylethene (TPE-2St) used as a cross-linker with linear arm precursors possessing terminal ATRP initiating moieties. Polyethylene macroinitiator (PE–Br) was prepared via the polyhomologation of dimethylsulfoxonium methylide with triethylborane followed by oxidation/hydrolysis and esterification of the produced PE–OH with 2-bromoisobutyryl bromide; polyethylene-block-poly(ε-caprolactone) diblock macroinitiator was derived by combining polyhomologation with ring-opening polymerization (ROP). All synthesized star polymers showed AIE-behavior either in solution or in bulk. At high concentration in good solvents (e.g., THF, or toluene) they exhibited low photoluminescence (PL) intensity due to the inner filter effect. In sharp contrast to the small molecule TPE-2St, the star polymers were highly emissive in dilute THF solutions. This can be attributed to the cross-linked structure of poly(TPE-2St) core which restricts the intramolecular rotation and thus induces emission. In addition, the PL intensity of PE star polymers in THF(solvent)/n-hexane(nonsolvent) mixtures, due to their nearly spherical shape, increased when the temperature decreased from 55 to 5 °C with a linear response in the range 40–5 °C.
dc.description.sponsorshipResearch reported in this publication was supported by King Abdullah University of Science and Technology (KAUST).
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/full/10.1021/acs.macromol.7b00506
dc.titleCore Cross-Linked Multiarm Star Polymers with Aggregation-Induced Emission and Temperature Responsive Fluorescence Characteristics
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentPolymer Synthesis Laboratory
dc.identifier.journalMacromolecules
kaust.personZhang, Zhen
kaust.personBilalis, Panagiotis
kaust.personZhang, Hefeng
kaust.personGnanou, Yves
kaust.personHadjichristidis, Nikos
dc.date.published-online2017-05-19
dc.date.published-print2017-06-13


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