Functional hyperbranched polymers with advanced optical, electrical and magnetic properties

Wu, Wenbo; Tang, Runli; Li, Qianqian

doi:10.1039/c4cs00224e

Cited by 341 publications

(217 citation statements)

References 247 publications

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“…[1][2][3][4][5][6][7][8] These luminescent polymers have demonstrated to possess some obvious advantages as 30 compared with the fluorescent inorganic nanoparticles (FINs) and fluorescent proteins. [9][10][11][12][13][14] The LONs can effectively overcome the toxicity and nonbiodegradability of FINs, and the high cost and photobleahcing of fluorescent proteins.…”

Section: Introductionmentioning

confidence: 99%

Stimulus responsive cross-linked AIE-active polymeric nanoprobes: fabrication and biological imaging application

Wan

Wang

et al. 2015

Polym. Chem.

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The combination of functional polymers and hydrophobic AIE dyes to prepare luminescent organic nanoparticles (LONs) with strong fluorescence, great water dispersibility and desirable biocompatibility have received numerous attentions for their potential applications in cell imaging and theranostics. Although great effort has been devoted to preparing AIE dye based LONs through both covalent and 10 noncovalent strategies, the fabrication of cross-linked AIE dye based LONs with stimulus responsive behavior has not been reported previously. In this work, the AIE dye based LONs were constructed via cross-linking aldehyde-containing polymers and AIE dye (2,2'-diaminotetraphenyl ethylene) with two amino groups through formation of Schiff base, which is a well known dynamic bond with pH responsiveness. After successful incorporation of the hydrophobic AIE dye into the copolymers, cross-15 linked core-shell lunminescent nanoparticles can be formed. The obtained AIE dye based LONs exhibited strong fluorescence and high water dispersiblity because the AIE dye was aggregated in the core and the hydrophilic polymers were covered on the shell. Biological evaluation results demonstrated that the AIE dye based LONs exhibited excllent biocompatibility and biological imaging properties. More importantly, these AIE dye based LONs exhibited desirable pH responsiveness, implied that these polymeric LONs are 20 potentially utilized for pH sensor and controlled drug delivery. Combination of the dynamic crosslinking and pH responsiveness, the obtained AIE dye based LONs should be of great significance for biomedical application.

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Section: Introductionmentioning

confidence: 99%

Stimulus responsive cross-linked AIE-active polymeric nanoprobes: fabrication and biological imaging application

Wan

Wang

et al. 2015

Polym. Chem.

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“…When acting as the electron donor material in BHJ-PSCs, a power conversion efficiency of 0.014% was obtained 148. The post-synthetic modification of linear opto-electric polymers at the end of main chains.Hyperbranched polymer (HBP) is a new kind of alternative polymers to dendrimers with spherical shape and similar properties, which could be prepared in one pot synthesis 6. In contrast, only a few examples have been reported for the polymers with the introduced functional groups in the main chains, possibly due to the limitation of the suitable chemical reactions.…”

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confidence: 99%

The utilization of post-synthetic modification in opto-electronic polymers: an effective complementary approach but not a competitive one to the traditional direct polymerization process

2015

Polym. Chem.

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In addition to the powerful direct polymerization of monomers, the post-synthetic modification route, involving the reaction between the polymer reactive intermediate and small molecule, is another approach for the preparation of functional polymers, which might not be yielded from their corresponding monomers through the direct polymerization. This article reviews the recent progress of the utilization of the post functional strategy, for the preparation of new opto-electronic polymers, discusses the design and functionality of these polymers, and gives some outlooks for the further exploration in this field at the end of this paper. 2 exhibited interesting, even exciting in some cases, optical or electrical properties, with huge potential applications in the fields of light-emitting diodes (LEDs), solar cells, sensors, non-linear optics (NLO) and so on. 4-7 Generally, different functionalities could be realized by different functional blocks introduced to the polymer systems as side chains or in the main chains. As a result, functional groups were frequently implanted in the predesigned monomers, and then embedded into the yielded functional polymers, during the polymerization process. [8][9][10] However, this synthetic approach does not always work successfully, since the functional group may poison the catalysts to hamper the growth of the polymer chain, or the corresponding monomers are inherently instable or could not be stable under the polymerization conditions.Fortunately, an alternative strategy, the post functional strategy, makes up most of the pities of the traditional direct polymerization approach. 11-13 As a typical example in industry, polyvinyl alcohol (PVA) could only be yielded through the post functional approach (Chart 1), as its corresponding monomer, vinyl alcohol, is not stable. Similar cases existed in the preparation of many opto-electronic polymers, by utilizing various reactions including the frequently used ones of the azo coupling, esterfication, knoevengel condensation, Heck and "click" reactions. 14-17 Chart 1 The synthesis of PVA by post synthetic modificationIn comparison with the direct polymerization approach, as the post functional reactions take place on the polymers, the complete conversion from one reactive group to another is not so easy.However, the post functional strategy could tolerate many functional groups containing high polarity, or reactive moieties, or special kinds of atoms, achieving the missions inaccessible from the direct polymerization approach. In recent years, more and more functional polymers were obtained from the post functional strategy, vastly enriching the family of functional polymers 3 with new offered functionalities, including some special optical and electrical properties. Herein, in this paper, we would like to review the recent progress of optical and electrical polymers, which were obtained through the post functional strategy, and mainly focus on the modification of the linear polymers with post-synthesis in the side chains, and the detail...

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Section: Introductionmentioning

confidence: 99%

“…Compared with their linear counterparts, the outstanding structures of these kinds of polymers result in outstanding properties: soluble in solvents though they are highly branched; low viscosity in solution due to their compact shape [1][2][3]. Therefore, the polymers have found a variety of practical or potential applications in many fields such as coatings [4], drug delivery [5,6], optical and electrical polymers [1], etc. Synthesis of hyperbranched polymers usually involves three methods: one is copolymerization of commercially available mono-vinyl monomers with small amount of bi-or multi-vinyl monomers; the second is polymerization of bi-or multi-vinyl monomers in the presence of excess initiator, which can guarantee low molecular weight of the polymers and avoid crosslinking by controlling feedstocks; the third is self-condensing vinyl polymerization via use of a species called inimer [7].…”

Section: Introductionmentioning

confidence: 99%

Preparation of hyperbranched polymer via single electron transfer living radical polymerization

Zhang

Chen

et al. 2015

IOP Conf. Ser.: Mater. Sci. Eng.

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Functional hyperbranched polymers with advanced optical, electrical and magnetic properties

Cited by 341 publications

References 247 publications

Stimulus responsive cross-linked AIE-active polymeric nanoprobes: fabrication and biological imaging application

Stimulus responsive cross-linked AIE-active polymeric nanoprobes: fabrication and biological imaging application

The utilization of post-synthetic modification in opto-electronic polymers: an effective complementary approach but not a competitive one to the traditional direct polymerization process

Preparation of hyperbranched polymer via single electron transfer living radical polymerization

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