Well-defined novel fluorene-containing polymers: Synthesis, fluorescent properties, and micellar nanoparticles

Lin, Yi-Pin; Zheng, Zhicheng; Hogen‐Esch, Thieo E.; Ling, Jun; Shen, Zhiquan

doi:10.1016/j.jcis.2012.09.055

Cited by 7 publications

(6 citation statements)

References 38 publications

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“… 23 For example, the aggregation of dye labeled polymers can cause quenching processes to be enhanced or inhibited, leading upon micellization to decreased or increased emission, respectively. 24 , 25 The degradation of polymer micelles derived from intrinsically fluorescent copolymers has also been observed by detecting a decrease in emission, 26 while the loss of mobility upon BCP micelle gelation has allowed for the glass transition temperature and critical micelle temperature to be measured by changes in emission from a covalently attached fluorophore. 27 Changes in the morphology of BCP assemblies can also be observed by measuring emission from fluorescent labels.…”

Section: Introductionmentioning

confidence: 99%

Fluorescent Block Copolymer Micelles That Can Self-Report on Their Assembly and Small Molecule Encapsulation

et al. 2016

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Block copolymer micelles have been prepared with a dithiomaleimide (DTM) fluorophore located in either the core or shell. Poly(triethylene glycol acrylate)-b-poly(tert-butyl acrylate) (P(TEGA)-b-P(tBA)) was synthesized by RAFT polymerization, with a DTM-functional acrylate monomer copolymerized into either the core forming P(tBA) block or the shell forming P(TEGA) block. Self-assembly by direct dissolution afforded spherical micelles with Rh of ca. 35 nm. Core-labeled micelles (CLMs) displayed bright emission (Φf = 17%) due to good protection of the fluorophore, whereas shell-labeled micelles (SLMs) had lower efficiency emission due to collisional quenching in the solvated corona. The transition from micelles to polymer unimers upon dilution could be detected by measuring the emission intensity of the solutions. For the core-labeled micelles, the fluorescence lifetime was also responsive to the supramolecular state, the lifetime being significantly longer for the micelles (τAv,I = 19 ns) than for the polymer unimers (τAv,I = 9 ns). The core-labeled micelles could also self-report on the presence of a fluorescent hydrophobic guest molecule (Nile Red) as a result of Förster resonance energy transfer (FRET) between the DTM fluorophore and the guest. The sensitivity of the DTM fluorophore to its environment therefore provides a simple handle to obtain detailed structural information for the labeled polymer micelles. A case will also be made for the application superiority of core-labeled micelles over shell-labeled micelles for the DTM fluorophore.

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Section: Introductionmentioning

confidence: 99%

Fluorescent Block Copolymer Micelles That Can Self-Report on Their Assembly and Small Molecule Encapsulation

et al. 2016

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“…Polyfl uorene (PF) is an excellent blue light-emitting conjugated polymer, since it has wide-band-gaps ( E g ) between 2.8 and 3.5 eV, great thermal stability, high photoluminescent quantum effi ciency (over 0.8), good charge transport properties, and good solubility in common organic solvents. [1][2][3][4][5][6][7][8] As a high band-gap polymer, it is often used as a donor to obtain green and red emission via either charge transfer or energy transfer. [9][10][11][12] For example, 2,1,3-benzothiadiazole and 4,7-di(2-thienyl)-2,1,3-benzothiadiazole are two commonly used acceptors to obtain green and red emission.…”

Section: Introductionmentioning

confidence: 99%

Amphiphilic Copolymers of Polyfluorene Methacrylates Exhibiting Tunable Emissions for Ink‐Jet Printing

Deng

Ling

2016

Macromol. Rapid Commun.

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Functionalized polyfluorene receives more and more attention due to its wide applications. Here, the syntheses of three novel polyfluorene-based methacrylate macromonomers exhibiting a vast flexibility for further applications are reported. Their emissions strongly depend on the end groups and thus the macromonomers provide blue, green, and red emissions simultaneously with the same excitation light of 365 nm. Their well-defined copolymers with 2-(dimethylamino) ethyl methacrylate via reversible addition-fragmentation chain transfer polymerization are investigated in detail. These copolymers exhibit high quantum yields in solid film (up to 0.8), and self-assemble into photoluminescent nanoparticles in aqueous solutions with pure blue, green, and red emissions. By simply mixing them, perfect white light emission with high quality is obtained. These aqueous nanoparticles solutions are ready for ink-jet printing to produce exquisite bright and colorful fluorescent pictures.

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“…On the other hand, vinyl backbone polymers with pendant p-conjugated oligomers are synthesized from styrene-and methacrylate-based monomers via conventional radical (co)polymerization. [12][13][14][15][16][17] These vinyl conjugated polymers have a considerable advantage as they exhibit excellent solubility and easily form uniform films. 18,19 Furthermore, it is feasible to design macromolecular architectures or change the composition to adjust their electronic and optoelectronic properties, which is a challenge in the above-mentioned main chain p-conjugated polymers.…”

Section: Introductionmentioning

confidence: 99%

“…The corresponding polymers obtained from macromonomers show unique selfassembly behavior and tunable properties. 14,17,19,[34][35][36] In this work, we report novel amphiphilic vinyl p-conjugated copolymers containing PF pendant groups (Scheme 1) as functional scaffolds for photoluminescent nanoparticles (NPs) in aqueous solution. Hydrophobic dyes including coumadin 6 (C6), Nile red (NR) and ( 4…”

Section: Introductionmentioning

confidence: 99%

Photoluminescent nanoparticles in water with tunable emission for coating and ink-jet printing

et al. 2015

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Well-defined novel fluorene-containing polymers: Synthesis, fluorescent properties, and micellar nanoparticles

Cited by 7 publications

References 38 publications

Fluorescent Block Copolymer Micelles That Can Self-Report on Their Assembly and Small Molecule Encapsulation

Fluorescent Block Copolymer Micelles That Can Self-Report on Their Assembly and Small Molecule Encapsulation

Amphiphilic Copolymers of Polyfluorene Methacrylates Exhibiting Tunable Emissions for Ink‐Jet Printing

Photoluminescent nanoparticles in water with tunable emission for coating and ink-jet printing

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