A New Family of Photoluminescent Polymers with Dual Chromophores

Hu, Chenxi; Guo, Zhaoyan; Ru, Yue; Song, Wenbo; Liu, Zhenjie; Zhang, Xiaohong; Qiao, Jinliang

doi:10.1002/marc.201800035

Cited by 25 publications

(25 citation statements)

References 38 publications

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“…( Figure A). The quantum yield of PP2 in THF was measured as ≈2% which is comparable to that of nonconventional polymeric chromophores . Deprotected polymers are soluble in water and can exhibit blue fluorescence in organic solvents as well as in water with an emission peak centered at 422 nm upon excitation at 339 nm (Figure B).…”

Section: Resultsmentioning

confidence: 99%

“…The quantum yield of PP2 in THF was measured as ≈2% which is comparable to that of nonconventional polymeric chromophores. [31] Deprotected polymers are soluble in water and can www.advancedsciencenews.com www.mcp-journal.de exhibit blue fluorescence in organic solvents as well as in water with an emission peak centered at 422 nm upon excitation at 339 nm ( Figure 5B). The generation of fluorescence from the polymers having nonfluorescent monomers is because of the "through space" π-π interaction between the benzene ring and the neighboring carbonyl group of the maleimide unit into the copolymer chain.…”

Section: Resultsmentioning

confidence: 99%

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Alternating Placement of d‐ and l‐Alanine Moieties in the Polymer Side‐Chains

Goswami

Saha

Mete

et al. 2018

Macro Chemistry & Physics

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Synthesis of a sequence‐controlled polymer via reversible addition‐fragmentation chain transfer polymerization is reported herein, using an N‐substituted maleimide monomer bearing tert‐butyl carbamate (Boc)‐protected l‐alanine (M1) and Boc‐d‐alanine appended styrenic monomer (M2). The monomer sequence distribution along the polymer chain is thoroughly studied by 1H and 13C NMR spectroscopy and matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry, confirming the alternating placement of l‐alanine and d‐alanine throughout the polymer chain. Copolymers display fluorescence properties in various organic solvents. After the deprotection of Boc‐groups, the copolymers show fluorescence activity in water (and also in several organic solvents), and pH‐responsiveness in aqueous medium due to the protonation/deprotonation of the side‐chain ‐NH2 groups at varying aqueous solution pH. In addition, the presence of different enantiomeric structures of alanine in the side‐chain enables us to investigate the chiroptical properties of the polymers.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Alternating Placement of d‐ and l‐Alanine Moieties in the Polymer Side‐Chains

Goswami

Saha

Mete

et al. 2018

Macro Chemistry & Physics

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“…24 Interestingly, Qiao et al found that ring-opened PMV could also generate strong blue and red dual photoemission after interacting with acetone and metal hydroxide. 25 They confirmed that the Na carboxylate group was the blue luminescence group with the excitation-dependent property, and the bulky carboxylic ester group was the red luminescence group with the excitation-independent property. Very recently, they realized the precisely regulation of the emission wavelength of hydrolyzed PMV from cyan to red by controlling the pH value.…”

Section: Introductionmentioning

confidence: 87%

Hydrated Hydroxide Complex Dominates the AIE Property of Nonconjugated Polymeric Luminophores

Yang

Zhou²,

Shan³

et al. 2021

Preprint

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Nontraditional intrinsic luminescence (NTIL) which always accompanied with aggregation-induced emission (AIE) features has received considerable attention due to their importance in the understanding of basic luminescence principle and potential practical applications. However, the rational modulation of the NTIL of nonconventional luminophores remains difficult, on account of the limited understanding of emission mechanisms. Herein, the emission colour of nonconjugated poly(methyl vinyl ether-alt-maleic anhydride) (PMVEMA) could be readily regulated from blue to red by controlling the alkalinity during the hydrolysis process. The nontraditional photoluminescence with AIE property was from the new formed p-band state, resulting from the strong overlapping of p orbitals of the clustered O atoms though space interactions. Hydrated hydroxide complexes embedded in the entangled polymer chain make big difference on the clustering of O atoms which dominates the AIE property of nonconjugated PMVEMA. These new insights into the photoemission mechanism of NTIL should stimulate additional experimental and theoretical studies and could benefit the molecular-level design of nontraditional chromophores for optoelectronics and other applications.

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“…More recently, Qiao et al prepared a new family of nonconjugated AIE polymers from low-cost poly(maleic anhydridealt-vinyl acetate) (PMV), acetone, and metal hydroxide (NaOH, LiOH, or KOH). [37] Taking PMV/Na as an example (Figure 10a), the nonconventional luminescence of PMV/Na polymer can be ascribed to the clusterization-triggered emission of both the sodium carboxylate groups and bulky carboxylic ester groups. Similar to PPRO, the fluorescence intensity of PMV/Na can also be enhanced by external forces due to the denser and more rigidified clusteroluminogens under the stimulus of mechanical forces.…”

Section: Mechanochromic Fluorescent Polymers Containing Nonconventionmentioning

confidence: 99%

Section: Mechanochromic Fluorescent Polymers Containing Nonconventionmentioning

confidence: 99%

Mechanochromic Fluorescent Polymers Enabled by AIE Processes

Han

Liu

Wang

et al. 2020

Macromol. Rapid Commun.

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Polymeric materials are susceptible to the chain re‐conformation, reorientation, slippage, and bond cleavage upon mechanical stimuli, which are likely to further grow into macro‐damages and eventually lead to the compromise or loss of materials performance. Therefore, it is of great academic importance and practical significance to sensitively detect the local mechanical states in polymers and monitor the dynamic variations in polymer structures and properties under external forces. Mechanochromic fluorescent polymers (MFP) are a class of smart materials by utilizing sensitive fluorescent motifs to detect polymer chain events upon mechanical stimuli. Taking advantage of the unique aggregation‐induced emission (AIE) effect, a variety of MFP systems that can self‐report their mechanical states and mechano‐induced structural and property changes through fluorescence signals have been developed. In this feature article, an overview of the recent progress on MFP systems enabled by AIE process is presented. The main design principles, including physically doping dispersed or microencapsulated AIE luminogens (AIEgens) into polymer matrix, chemically linking AIEgens in polymer backbones, and utilizing the clusterization‐triggered emission of polymers containing nonconventional luminogens, are discussed with representative examples. Perspectives on the existing challenges and problems in this field are also discussed to guide future development.

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A New Family of Photoluminescent Polymers with Dual Chromophores

Cited by 25 publications

References 38 publications

Alternating Placement of d‐ and l‐Alanine Moieties in the Polymer Side‐Chains

Alternating Placement of d‐ and l‐Alanine Moieties in the Polymer Side‐Chains

Hydrated Hydroxide Complex Dominates the AIE Property of Nonconjugated Polymeric Luminophores

Mechanochromic Fluorescent Polymers Enabled by AIE Processes

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