Polyampholytic graft copolymers based on polydehydroalanine (PDha) – synthesis, solution behavior and application as dispersants for carbon nanotubes

Max, Johannes B.; Pergushov, Dmitry V.; Sigolaeva, Larisa V.; Schacher, Felix H.

doi:10.1039/c8py01390j

Cited by 24 publications

(48 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Poly(dehydroalanine) (PDha), a polyampholyte featuring high charge density and both amine and carboxylate moieties in every repeat unit, [ 28 ] was introduced recently as a versatile platform to obtain tailor‐made copolymers with defined hydrophilicity, [ 29,30 ] as a building block in double hydrophilic block copolymers, [ 31 ] or as a template for the pH‐controlled formation of Au/Ag alloy nanoparticles. [ 32 ] Hereby, the polyampholytic PDha backbone offers pH‐dependent net charge and a high density of functional groups as anchoring points for grafts or as binding sites for metal ions.…”

Section: Methodsmentioning

confidence: 99%

Triple‐Responsive Polyampholytic Graft Copolymers as Smart Sensors with Varying Output

Max

Nabiyan

Eichhorn

et al. 2020

Macromol. Rapid Commun.

Self Cite

View full text Add to dashboard Cite

Three triggers result in two measurable outputs from polymeric sensors: multiresponsive polyampholytic graft copolymers respond to pH‐value and temperature, as well as the type and concentration of metal cations and therefore, allow the transformation of external triggers into simply measurable outputs (cloud point temperature (TCP) and surface plasmon resonance (SPR) of encapsulated silver nanoparticles). The synthesis relies on poly(dehydroalanine) (PDha) as the reactive backbone and gives straightforward access to materials with tunable composition and output. In particular, a rather high sensitivity toward the presence of Cu2+, Co2+, and Pb2+ metal cations is found.

show abstract

Section: Methodsmentioning

confidence: 99%

Triple‐Responsive Polyampholytic Graft Copolymers as Smart Sensors with Varying Output

Max

Nabiyan

Eichhorn

et al. 2020

Macromol. Rapid Commun.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Polymeric materials of amphiphilic nature can provide good dispersibility of MWCNTs in aqueous media and ensure long-term colloidal stability of such systems, as we demonstrated earlier for polymers of various structure and composition, such as imidazolium-based poly(ionic liquid)s [ 23 ], cationic poly(1,2-butadiene)- block -poly(2-(dimethylamino)ethyl methacrylate) diblock copolymers [ 34 ], anionic poly( n -butylacrylate)- block -poly(acrylic acid) diblock copolymers [ 36 ], and poly(dehydroalanine)-based graft copolymers [ 38 ]. The amphiphilic nature of the polymer is of key importance for successful dispersing of superhydrophobic carbon nanomaterials to individual fragments (particles) in aqueous media.…”

Section: Resultsmentioning

confidence: 98%

Rational Design of Amphiphilic Diblock Copolymer/MWCNT Surface Modifiers and Their Application for Direct Electrochemical Sensing of DNA

et al. 2020

View full text Add to dashboard Cite

We demonstrate the application of amphiphilic ionic poly(n-butylmethacrylate)-block- poly(2-(dimethylamino)ethyl methacrylate) diblock copolymers (PnBMA40-b-PDMAEMA40, PnBMA40-b-PDMAEMA120, PnBMA70-b-PDMAEMA120) for dispersing multiwalled carbon nanotubes (MWCNTs) in aqueous media, a subsequent efficient surface modification of screen-printed electrodes (SPEs), and the application of the modified SPEs for DNA electrochemistry. Stable and fine aqueous dispersions of MWCNTs were obtained with PnBMAx-b-PDMAEMAy diblock copolymers, regardless of the structure of the copolymer and the amount of MWCNTs in the dispersions. The effect of the diblock copolymer structure was important when the dispersions of MWCNTs were deposited as modifying layers on surfaces of SPEs, resulting in considerable increases of the electroactive surface areas and great acceleration of the electron transfer rate. The SPE/(PnBMAx-b-PDMAEMAy + MWCNT) constructs were further exploited for direct electrochemical oxidation of the guanine (G) and adenine (A) residues in a model salmon sperm double-stranded DNA (dsDNA). Two well-defined irreversible oxidation peaks were observed at about +600 and +900 mV, corresponding to the electrochemical oxidation of G and A residues, respectively. A multi-parametric optimization of dsDNA electrochemistry enables one to get the limits of detection (LOD) as low as 5 μg/mL (0.25 μM) and 1 μg/mL (0.05 μM) for G and A residues, respectively. The achieved sensitivity of DNA assay enables quantification of the A and G residues of dsDNA in the presence of human serum and DNA in isolated human leukocytes.

show abstract

“…In our case, we chose ap oly(dehydroalanine)-graftpoly(ethylene glycol) graft copolymer (PDha-g-PEG), as this exhibits ac harged backbone, broad solubility in water over the entire pH range and has been shown to solubilize both hydrophobic carbon nanotubes as well as to serve as templatef or the formation of AgAu alloy nanoparticles. [61,62] Additionally, the presence of aw ater-soluble polymerics urfactant has also shown to stabilize the catalyst. For that purpose, PMI 10-12 were dispersed in aqueous solution containingP Dha-g-PEG.…”

Section: Light-driven Hydrogen Evolution Catalysismentioning

confidence: 99%

1,7,9,10‐Tetrasubstituted PMIs Accessible through Decarboxylative Bromination: Synthesis, Characterization, Photophysical Studies, and Hydrogen Evolution Catalysis

Costabel

Skabeev

Nabiyan

et al. 2021

Chemistry A European J

View full text Add to dashboard Cite

In this work, we present an ew synthetics trategy for fourfold-substituted perylene monoimides via tetrabrominated perylene monoanhydrides. X-ray diffraction analysis unveiled the intramolecular stacking orientation between the substituents and semicircular packing behavior.W eo bserved the remarkable influence of the substituent on the longevity and nature of the excited state upon visible light excitation.I nt he presenceo fp oly(dehydroalanine)-graftpoly(ethylene glycol)g raft copolymers as solubilizing template, the chromophores are capable of sensitizing [Mo 3 S 13 ] 2À clustersi na queous solution for stable visible light driven hydrogen evolution over three days.

show abstract

Polyampholytic graft copolymers based on polydehydroalanine (PDha) – synthesis, solution behavior and application as dispersants for carbon nanotubes

Abstract: We herein introduce a versatile platform of graft copolymers featuring a polyampholytic backbone and side chains of varying length and polarity using post-polymerization modification of polydehydroalanine (PDha).

Cited by 24 publications

References 73 publications

Triple‐Responsive Polyampholytic Graft Copolymers as Smart Sensors with Varying Output

Triple‐Responsive Polyampholytic Graft Copolymers as Smart Sensors with Varying Output

Rational Design of Amphiphilic Diblock Copolymer/MWCNT Surface Modifiers and Their Application for Direct Electrochemical Sensing of DNA

1,7,9,10‐Tetrasubstituted PMIs Accessible through Decarboxylative Bromination: Synthesis, Characterization, Photophysical Studies, and Hydrogen Evolution Catalysis

Contact Info

Product

Resources

About