Search results
Search for "polyelectrolytes" in Full Text gives 12 result(s) in Beilstein Journal of Organic Chemistry.
Constrained thermoresponsive polymers – new insights into fundamentals and applications
Beilstein J. Org. Chem. 2021, 17, 2123–2163, doi:10.3762/bjoc.17.138
- ][133], since the near-surface segments tend to segregate compared to the outer region. This results in a broadening of the temperature range in which the polymer chains collapse. The third class of brushes are films composed of polyelectrolytes in which long-range Coulomb interactions are dominant [134
- , have significant influence on the swelling behavior in the case of weak polyelectrolytes. In a salted brush, the concentration outside and inside the brush is approximately the same and the swelling properties are determined by excluded volume interactions between the segments. In an osmotic brush, the
- zwitterionic polymers display a very sharp phase transition in pure water, their use for biological applications is therefore limited. However, besides zwitterionic compounds, UCST behavior can also be induced in polyelectrolytes via suitable counterions [50]. Analogously, electrostatic interactions dominate
Multiswitchable photoacid–hydroxyflavylium–polyelectrolyte nano-assemblies
Beilstein J. Org. Chem. 2021, 17, 166–185, doi:10.3762/bjoc.17.17
- not rely on specific binding motifs. Here, electrostatic self-assembly was shown to yield a variety of supramolecular nanostructures [4][26][27][28][29][30][31][32][33]. We have built the nanoscale assemblies from polyelectrolytes and multiply oppositely charged molecules based on electrostatic
Fluorogenic PNA probes
Beilstein J. Org. Chem. 2018, 14, 253–281, doi:10.3762/bjoc.14.17
- oligonucleotides or analogues. One notable example is the use of a labeled PNA probe in combination with water-soluble cationic conjugated polyelectrolytes (CCP) for the FRET-based detection of DNA [114]. The CCP is typically an extended π-conjugated system, such as oligophenylene/fluorene with appending
Synthesis of naturally-derived macromolecules through simplified electrochemically mediated ATRP
Beilstein J. Org. Chem. 2017, 13, 2466–2472, doi:10.3762/bjoc.13.243
- ][36], and neurodegenerative diseases [27]. PtBA was selected as functional arm of polymer stars because it can be readily transformed to poly(acrylic acid) via deprotection, yielding polyelectrolytes. Such polymers are one of the most extensively studied, industrially important, water-soluble
Grip on complexity in chemical reaction networks
Beilstein J. Org. Chem. 2017, 13, 1486–1497, doi:10.3762/bjoc.13.147
- output, creating a binary signal. Finally, we used oppositely charged polyelectrolytes to form complex coacervates in Figure 6c. Coacervates are formed in the second CSTR only in the absence of Tr, as Tr catalyzes the lysine-functionalized polycation. This demonstrates that the relatively long
Recent advances in metathesis-derived polymers containing transition metals in the side chain
Beilstein J. Org. Chem. 2015, 11, 2747–2762, doi:10.3762/bjoc.11.296
- recent study, Tang and coworkers [52] performed a quantitative analysis of counterion exchange in cobaltocene-containing polyelectrolytes that are accessible by an initial ROMP, and subsequently derivatized with cobalt motifs. These results appear to be relevant for self-assembly and drug-delivery
- systems with this type of polyelectrolytes. An interesting cobalt-containing diblock copolymer, bearing a dicobalt hexacarbonyl complex coordinated to an alkyne, with a constant block ratio was proposed as a new magnetic material by Tew et al. [53]. Their procedure involved the synthesis of a first block
- two alternative ROMP protocols, both starting from 5-formyl-2-norbornene (14) and using the Grubbs 3rd generation catalyst, Astruc and coworkers [54] successfully prepared new redox-active cobalticenium-tethered polyelectrolytes of type 17. According to the first protocol, the norbornene monomer
Functionalized branched EDOT-terthiophene copolymer films by electropolymerization and post-polymerization “click”-reactions
Beilstein J. Org. Chem. 2015, 11, 335–347, doi:10.3762/bjoc.11.39
- precursor monomers which give access to post-polymerization reactions. Ionic groups on conjugated polymers – so-called conjugated polyelectrolytes [25] – are discussed in the context of solubility tuning [26], sensor applications [27], improvement of solar cell performance by usage as hole injection layers
Properties of cationic monosubstituted tetraalkylammonium cyclodextrin derivatives – their stability, complexation ability in solution or when deposited on solid anionic surface
Beilstein J. Org. Chem. 2015, 11, 192–199, doi:10.3762/bjoc.11.20
- deposited on an anionic Nafion® membrane, which showed good selectivity toward butanol isomers [25]. Multilayered assemblies of anionic sulfonated CD derivatives and cationic polyelectrolytes were also prepared by a layer-by-layer strategy and used for the construction of an optical sensor for litocholic
Synthesis and characterization of a hyper-branched water-soluble β-cyclodextrin polymer
Beilstein J. Org. Chem. 2014, 10, 2586–2593, doi:10.3762/bjoc.10.271
- ; polyelectrolytes; soluble β-cyclodextrin polymers; Introduction Cyclodextrins (CDs) are biomolecules consisting of glucopyranoside units linked 1,4 to form cyclic oligossacharides. CDs composed of 6, 7 or 8 sugar units, which are known as α-, β- and γ-cyclodextrins respectively, are characterized by a toroidal
A promising cellulose-based polyzwitterion with pH-sensitive charges
Beilstein J. Org. Chem. 2014, 10, 1549–1556, doi:10.3762/bjoc.10.159
- . Keywords: carbonate; cellulose; complexation; multivalent glycosystems; NMR; polyzwitterion; Introduction Ionic polymers are important naturally occurring macromolecules and various synthetic polyelectrolytes play an important role in commercial applications [1]. Naturally occurring biopolymers are for
- -soluble polyelectrolytes, containing anionic or cationic groups, and polyzwitterions that include both charges. While the addition of low molecular weight electrolyte cause the polyelectrolyte effect, i.e., the shrinking and precipitation of the polyelectrolyte, polyzwitterions show chain expansion and
Supramolecular hydrogels formed from poly(viologen) cross-linked with cyclodextrin dimers and their physical properties
Beilstein J. Org. Chem. 2012, 8, 1594–1600, doi:10.3762/bjoc.8.182
- unique physical properties [10]. Previously, we have prepared a polyrotaxane using α-CD and PEG [16][17]. The α-CD/PEG polyrotaxane forms a hydrogel material in high concentrations [18]. Using polyelectrolytes as threading molecules results in complexation between the polyelectrolyte and α-CD within the
Chromo- and fluorophoric water-soluble polymers and silica particles by nucleophilic substitution reaction of poly(vinyl amine)
Beilstein J. Org. Chem. 2010, 6, No. 79, doi:10.3762/bjoc.6.79
- a high synthetic effort. Micelle techniques commonly used to carry out reactions between water-soluble and insoluble compounds cannot be cleanly applied to modify polyelectrolytes [25]. Alternatively, water-soluble polymers can be modified by the introduction of alkyl or aryl groups, thus mediating
Other Beilstein-Institut Open Science Activities
