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Search for "polyelectrolyte" 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
- between the chains themselves and with the solvent including structuring effects in hydrogen bonding solvents, and polyelectrolyte brushes, whose behavior is additionally determined by long-range Coulomb interactions [114][116]. The main difference between classical and nonclassical polymer brushes is the
- , nowadays more and more examples of counterion-induced thermoresponsiveness on charged homopolymers as well as copolymers have been revealed [50][51][286]. In addition to the thermoresponsive behavior of the branched polyelectrolyte polyethyleneimine (PEI) described by Noh et al. [287] in the presence of
Recent advances in the application of isoindigo derivatives in materials chemistry
Beilstein J. Org. Chem. 2021, 17, 1533–1564, doi:10.3762/bjoc.17.111
- , such as staining efficiency (362 cm2⋅C−1 at 1050 nm), fast switching time (0.5 s), high optical contrast (59% at 1500 nm), and redox stability (<8% after 4000 cycles). Poly(isoindigothiophene) 65 containing sulfonate groups in the side chain was used as an anionic photoactive polyelectrolyte in a
DNA with zwitterionic and negatively charged phosphate modifications: Formation of DNA triplexes, duplexes and cell uptake studies
Beilstein J. Org. Chem. 2021, 17, 749–761, doi:10.3762/bjoc.17.65
- and 100 mM NaCl. The polyelectrolyte ion condensation theory can be used to explain how an N+ modification stabilises duplex formation: For natural DNA, the double-helical form has a higher charge density in comparison with the single-stranded form. During denaturation, a portion of the counterions
Multiswitchable photoacid–hydroxyflavylium–polyelectrolyte nano-assemblies
Beilstein J. Org. Chem. 2021, 17, 166–185, doi:10.3762/bjoc.17.17
- pH-responsive nano-assemblies with switchable size and structure are formed by the association of a photoacid, anthocyanidin, and a linear polyelectrolyte in aqueous solution. Specifically, anionic disulfonated naphthol derivatives, neutral hydroxyflavylium, and cationic poly(allylamine) are used as
- ; multiswitchable; photoacid; polyelectrolyte; Introduction Supramolecular nanoscale assemblies responding to multiple stimuli are highly desirable in various fields including transport systems, sensors, and optoelectronic applications [1][2][3][4][5][6][7][8]. Self-assembly into supramolecular structures and
- combining a polyelectrolyte and an ionic azo dye [4]. Moreover, recently we have developed a switchable nano-assembly system based on photoacids [66][67]. Photoacids are molecules for which light irradiation leads to an enhanced proton dissociation and thus to a more highly charged molecule. Furthermore
Interactions between tetrathiafulvalene units in dimeric structures – the influence of cyclic cores
Beilstein J. Org. Chem. 2015, 11, 930–948, doi:10.3762/bjoc.11.104
- TTF dimer tetracations. As already extensively discussed in [32] concerning the redox properties of self-assembled polyelectrolyte multilayers, consisting of well-defined water-soluble electronically conducting poly-3-(30-thienyloxy)propyltriethylammonium, the spinless doubly charged species can be
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
- electrochemical charging shows the characteristic steady decrease of the neutral band and the increase of the absorption at lower energy accounting for the generation of delocalized charges in both the parent polymer and the ionically modified one. The preparation of a conjugated polyelectrolyte with tunable HOMO
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
- acid [26]. Similar approaches of ionic self-assembly with CDs were used for the preparation of nanoparticles with external CD trigger [27], new material nanostructures [28], polyelectrolyte-surfactant complexes which yield new types of solid mesomorphous materials [29], or membranes with size-selective
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
- presence of Cu2+, Fe3+, Ba2+, Cd2+, Pb2+ and Sn2+, by forming metal–organic complexes. Conversely, no precipitation occurs with Ca2+, Mg2+, Fe2+, Mn2+, Ni2+ and Ce4+, showing some selectivity towards certain metal cations and indirect evidence of polyelectrolyte behavior. A gross evaluation of the
A promising cellulose-based polyzwitterion with pH-sensitive charges
Beilstein J. Org. Chem. 2014, 10, 1549–1556, doi:10.3762/bjoc.10.159
- -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
- value of 9. At lower pH values, large aggregates are formed induced by self-complexation. Polyelectrolyte complex formation with polyDADMAC A permanently charged polycation (polydiallyldimethylammonium chloride, polyDADMAC) was applied to study the formation of interpolyelectrolyte complexes. In the
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
Conjugated polymers containing diketopyrrolopyrrole units in the main chain
Beilstein J. Org. Chem. 2010, 6, 830–845, doi:10.3762/bjoc.6.92
- a strong fluorescence with maxima at 520 nm and a large Stokes-shift of 50 nm. However, due to the aliphatic structure of the main chain, the thermal stability was rather poor. Photoluminescent polyelectrolyte-surfactant complexes were obtained from an amphiphilic, unsymmetrically substituted DPP
- -derivative upon complex formation with polyallylamine hydrochloride or polyethyleneimine [24]. The complexes exhibit a mesomorphous structure with the glass transition temperatures dependent on the structure of the polyelectrolyte. The first synthesis of conjugated DPP-polymers and copolymers via Pd
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
- charge-neutral amines (−NH2). In this context, PVAm can be considered as a weak cationic polyelectrolyte. The pH-variation is an excellent tool to control and adjust the net-charge density along the polymer chain or in a layer made from PVAm [16][17]. Full conversion of the amino groups into their
- lower pH values the polymer has a more straight conformation and interactions of the solvent with the fluorophore are possible. The explanation is in good agreement with the known behavior of weak cationic polyelectrolyte molecules. With lowering the pH of the surrounding aqueous solution the degree of
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