Synthesis and stability of BODIPY-based fluorescent polymer brushes at different pHs

Cimen, Dilek; Kursun, Talya Tugana; Çaykara, Tuncer

doi:10.1002/pola.27426

Cited by 17 publications

(10 citation statements)

References 43 publications

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“…In this present work, we assumed that the direct covalent bond (SiC) to the hydrogen terminated silicon substrate provides a well‐defined organic monolayer–silicon interfaces, and the nonpolar character of this strong bond make these monolayers thermally and chemically (against solvent or acid/base treatments) very strong . Therefore, the hydrogen terminated surfaces were reacted with t ‐BOC protected AUD molecules by UV‐induced (λ = 254 nm) self‐assembly monolayer (SAM) process to give SiC linked monolayers (Scheme ).…”

Section: Resultsmentioning

confidence: 99%

Glycopolymer brushes with specific protein recognition property

Kursun¹,

Cimen

Çaykara

2017

J of Applied Polymer Sci

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Here, we report the synthesis of glycopolymer brushes on the silicon substrate by interface‐mediated reversible addition‐fragmentation chain transfer polymerization of pentafluorophenyl acrylate as well as subsequent attachment of d‐glucosamine to determine specific and nonspecific protein interactions. The root‐mean‐square roughness of the glycopolymer brushes is only about 3.1 nm, indicating unstable distribution of the collapsed glycopolymer chains on the surface. The water contact angle of glycopolymer brush was determined as ∼53° indicating a hydrophilic behavior. The results of fluorescence microscopy studies indicated that the glycopolymer brushes have specific interaction with fluorescence‐labeled Concanavalin A and nonspecific interaction with fluorescence‐labeled bovine serum albumin. The glycopolymer brushes tested here are hoped to enlarge to our knowledge of recognition phenomena at the surface of polymer brushes. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45238.

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Section: Resultsmentioning

confidence: 99%

Glycopolymer brushes with specific protein recognition property

Kursun¹,

Cimen

Çaykara

2017

J of Applied Polymer Sci

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“…They observed that more significant degrafting of 38 % occurred at a pH of 12, however 28 % degrafting was still observed at a pH of 6. The authors also note that the polymer brushes prepared here utilizing a Si−C bond are more stable under conditions of extreme pH than silanol groups [71] …”

Section: Applications Of Fluorescent Polymer Brush Materialsmentioning

confidence: 89%

“…[68] By replacing the polymerization chain end (in particular RAFT chain transfer agents) with a luminescent moiety, the effect of fluorescence quenching may thus be mitigated. Many different chemistries have been applied to the chain-end functionalization of polymer brushes, including nitroxide radical exchange [69] azide-alkyne cycloaddition (Figure 3), [65,70] and the formation of amide [67] or ester bonds [71] between the polymer chain end and dye. In 2013, Hawker and co-workers demonstrated the use of chain-end functionalization in the preparation of multifunctional photopatterned monolayers.…”

Section: Pre-and Post-polymerization Modificationmentioning

confidence: 99%

Luminescent Surface‐Tethered Polymer Brush Materials

Poisson

Hudson

2022

Chemistry A European J

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Surface-tethered polymers are unique molecular architectures that have been recently used in advanced sensors, electronics and biomedical applications. However, techniques for characterizing these materials in their surfacetethered form remain limited. The incorporation of luminescent functionality into these materials has enabled new characterization methods, while also unlocking new applications in optoelectronics, stenography and sensing. Micronscale photolithography techniques have recently enabled the preparation of high-resolution patterns, as well as architectures with unique photophysical properties. Herein, we provide an overview of the techniques used to prepare luminescent polymer brush materials and their applications in stimuli-responsive sensors, cell adhesion materials, and optoelectronics. We also provide our perspective on the promising future uses of surface-tethered polymers, as well as the shortterm challenges and opportunities in the field.

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“…Although there are many possible applications, stability of the PEBs is critical. Within the last decade, there has been an increasing number of reports about degradation of polymer brushes . A first report of Tugulu and Klok described the delamination process of poly[poly(ethylene glycol)methacrylate] brushes upon exposure to a cell culture medium .…”

Section: Introductionmentioning

confidence: 99%

Entropic death of nonpatterned and nanopatterned polyelectrolyte brushes

Menzel

Chen

Simancas

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

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The stability of nonpatterned and nanopatterned strong polyelectrolyte brushes (PEBs) is studied as a function of both brush character and the properties of a contacting liquid. High-molecularweight PEBs of poly(4-methyl vinylpyridinium iodide) (PMeVP) are synthesized using surface-initiated radical-chain polymerization. Nanopatterned brushes (NPBs) line with pattern sizes ranging from 50 to 200 nm are generated by patterning the initiator layer using deep-ultraviolet photolithography followed by brush growth initiated from the patterned layer. Homogeneous PEBs with different degrees of charging and grafting densities are exposed to water and salt solutions with different temperatures for different periods. The degradation is monitored through dry-state ellipsometry and atomic force microscopy measurements. Enhanced degrafting for more strongly swollen polymer brushes can be observed in agreement with an "entropic spring" model. Based on the results of the nonpatterned brushes, the NPBs are exposed to water at different temperatures and external salt content for varying periods of time. Counterintuitively, the NPBs show increased degrafting for smaller patterns, which is attributed to different polymer chain dynamics for nanobrushes and microbrushes. We investigate the influence of thermodynamic and kinetic parameters on the stability of (nanopatterned) PEBs and discuss the role of entanglements and formation of complexes in such films.The additional strong electrostatic interactions due to the charges are a reason for the unusual and versatile behavior of PEBs compared to their neutral peers. 12 Thus, if polymer brushes with similar structures are compared, while neutral polymer brushes can already stretch by up to 40% of their contour length, PELs can stretch even more and stretched values of more than 65% of the contour length have been observed. 13 Such strong stretching leads to a significant loss of entropy and completely changes the properties of the layers, rendering PEBs as an attractive molecular architecture. They are often used for applications in the field of biochemistry as most organic molecules synthesized by living organisms carry electrolyte groups themselves. Thus, PEBs have been used for the analysis and study of proteins, 14 DNA, 15 vitamins 16 and in gene, 16 and drug 17 delivery. In addition, they are also perfect candidates for applications in antifouling medical devices, 18 biosensing, 19 antibacterial coatings, 5 cell culture substrates, 20 stem cell Additional supporting information may be found in the online version of this article. † M. Menzel and W. -L. Chen contributed equally to this article.

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Synthesis and stability of BODIPY-based fluorescent polymer brushes at different pHs

Cited by 17 publications

References 43 publications

Glycopolymer brushes with specific protein recognition property

Glycopolymer brushes with specific protein recognition property

Luminescent Surface‐Tethered Polymer Brush Materials

Entropic death of nonpatterned and nanopatterned polyelectrolyte brushes

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