Polyelektrolyt‐Tensidionen‐Komplexe (Literaturübersicht). Teil II. Komplexbildung zwischen anionischen Polyelektrolyten und Kationtensiden

Dawydoff, W.; Linow, K.‐J.; Philipp, B.

doi:10.1002/actp.1987.010380801

Cited by 4 publications

(5 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Tetraethylammonium perchlorate (TEAP) was vacuum-dried for 24 h prior to use. Tetrabutylammonium hydroxide (TBAOH) was obtained from Aldrich as (4) Schwank, J. Gold Bull.…”

Section: Methodsmentioning

confidence: 99%

“…The voluminous literature on polymer-surfactant interactions has been documented in a number of reviews. [1][2][3][4] Predominantly, these studies deal either with complexes formed between polyelectrolytes and oppositely charged ionic surfactants below the critical micelle concentration (cmc) or with the association of nonionic polymers (e.g., poly(oxyethylene)) with micelles of ionic surfactants (e.g., SDS). Conspicuously absent are investigations of interactions between polyelectrolytes and ionic surfactants above the cmc.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Formation of metal-oxygen surface compounds on copper, silver, and gold electrodes via electrochemical oxidation of hydroxide ion and autoxidation in acetonitrile

Sawyer¹,

Chooto²,

Tsang³

1989

Langmuir

View full text Add to dashboard Cite

The oxidation of hydroxide ion in acetonitrile at copper, silver, gold, and glassy carbon electrodes has been characterized by cyclic voltammetry. In the absence of bases the metal electrodes are oxidized to their respective cations (Cu+, Ag+, and Au"1") at potentials that range from -0.2 V vs SCE for Cu to +1.3 V for Au. At glassy carbon "OH is oxidized to 0" (+0.35 V vs SCE) and then to •0• by an ECE mechanism. In contrast, with freshly polished metal electrodes the oxidation of "OH to O'" and •0• is facilitated via formation of metal-s/oxygen-p covalent bonds to give a series of surface compounds (MOH, (MO)", MOM, and MOOM). The shift to less positive oxidation potentials has been used to obtain an estimate of the metal-oxygen covalent bond energies (about 40-60 kcal). On the basis of the redox thermodynamics and the substrate reactions we conclude that the oxygen in these metal-oxygen surface compounds is essentially neutral (atomic •0•) and stabilized via covalent s-p bonds with neutral-charge metal atoms. Concurrent reduction of Cu+ plus 02, and of Ag+ plus 02, yields a series of surface compounds (MOM, MOOM, and (MO)") that parallel those that result from "OH oxidation at the metal surfaces.

show abstract

“…Tetraethylammonium perchlorate (TEAP) was vacuum-dried for 24 h prior to use. Tetrabutylammonium hydroxide (TBAOH) was obtained from Aldrich as (4) Schwank, J. Gold Bull.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Formation of metal-oxygen surface compounds on copper, silver, and gold electrodes via electrochemical oxidation of hydroxide ion and autoxidation in acetonitrile

Sawyer¹,

Chooto²,

Tsang³

1989

Langmuir

View full text Add to dashboard Cite

show abstract

“…anionisclieii PEL und Kationtensiden [2] behandelt. Im folgenden I3eitrag soil nun zunbchst in Fortsetzung dieser Studie die Bildungsweise und Struktur von Tensidkomplexen rnit Polyampholyt ('11 und mit Polypeptiden beschrieben werden.…”

Section: Einlritiingunclassified

Polyelektrolyt‐Tensidionen‐Komplexe (Literaturübersicht). Teil III: Komplexbildung mit Polyampholyten und Polypeptiden sowie zusammenfassende Auswertung der Studie

Dawydoff¹,

Linow²,

Philipp³

1987

Acta Polymerica

Self Cite

View full text Add to dashboard Cite

Teil 111 : Komplexbildung mit Polyampholyten und Polypeptiden sowie zusammenfassende Auswertung der StudieAkadrniic, tlcr Wissenscliaften der DDR, Institiit fur Polymerenchemie ,,Eric11 Correns", DDR-1530 Teltow-Seehof A i i s drr cinscliliigigen Iiteratur werden die wescntlich~n Experimentalergebnissc zwischen ionisclren Tensiden und l'olyampholytni sowie zwischen ionisclien Trnsiden und synthetischen Polypeptiden zusammengefafit. Bei letzteren \ \ i d vor allem auf die auftretenden Konformatioiisaiitlerungen der Polypeptidketten eingegangen. Als AbschluB tler gesamten Studie erfolgt eine zusammenfassende Auswertung des erreichten Erkenntriisstandes auf dem Gebiet der I'olyelektrolyt-Tensidionen-Knmplexe. Hierbei werden mctliodische Aspekte, Einfliisse von Komponentenparametem auf die Iiomplesbildnng, blodellvorstcllirng~n zur Strukt nr solclicr Komplexe nnd mbgliche Einsatzriclitungrn zusnminrirfassend behandelt. ICownneKcbs n o~u 3~e~r n p o~c u m o cc I713 B . G00621~. 3.: Kownne~coot5pa3osa~ue c nonuaA6ommaAu u noniinmni udamu ii noihimo~cueamu(ax oyenKa 0630pttbix d a w m x RCXOAR 113 AaHHbIX JIllTepaTypbI npHReAeHb1 BaWHefiUIPIe pe3yJIbTaTbI HCCJIeAOBaHHfi B 06JIaCTR KOMnJIeKCO06pa30BaHHR MeWAy KOHHMMR UAB K IIOJIMaM@OnKTaMK, a TaKWe MeWnj' MOHHbIMH n A B 1% CHHTeTUqeCHHMM noJIHIIenTllAaMM. B IlOCJIeAHeM CJIyqae OCHOBHOe BHHMaHAe YReneHo, IIpeXAe BCerO, Ha6nIOAaeMMM H3MeHeHHRM KOH@OpMaUHH IlOJIPIneIITMAHhIX qenefi. B 3aKJIIO9eHAe lIOABeA€!H HTOr HaKOIIneHHOfi HH$OpMaqAH B o 6 n a c~~ KOMIIJIeKCOR MeXAJ' IlOJIPI3JIeKTpOJIHTaM11 11 AOHHbIMH n A B . npH 3TOM PaCCMOTpeHM TaKAe BOnpOCbI KBK MeTOAHqeCKHe aCneKTb1. RJIHRHHe napaMeTpOB KOMnOHeHTOB Ha KOMnJIeKCOO6pa30BaH11e, MOAeJlbHbIe npeACTaBJleHHR 0 CTpyKType TaKIlX KOMnXeKCOB 11 B03MOXHbIe 0 6 n a c~~ HX IIpHMeHeHHR. Polyelectrolyte-tenside ion complexes ( A literature review). Part III. Complez formation with polyanrpholytes and polypeptides, and suittniarizing evaluation of this reviewRelevant experimental results hitherto published on complex formation between ionic surfactants and polyampholgtes as well as between ionic surfactants and synthetic polypeptides are reviewed. In connection with the latter ones, conformational changes of the polypeptide chains are stressed. In concluding the review, an evaluation of the present state of knowledge on polyelectrolyte-ionic surfactant-complexes is presented, covering methodical aspects, influence of component paranirtrrs on complex formation, rnotlrl considerations on romplrx striirturc, and pnssihle areas of appl ir a t io t i .High temperature NMR studies with and without magic angle spinning (MAS) of the sample were carried out on tlirrr polyethylene fractions. The effect of spinning on botli thc frre induction drcay and the transverse relaxation function ohtained by HAHN'S spin echo technique was invcstigntd. The results are conipawd with those o f measurements rising the MY4 pulse sequence. 3*

show abstract

“…Dissolved in water polyelectrolytes and oppositely charged surfactants form a manifold of aggregates. 1,2 Depending on overall concentrations, on the chemical nature, and on molar ratios of polyelectrolyte and surfactant, these aggregates differ in size, shape, and lyotropic liquid crystalline structure. Also, phase equilibria and the influence of low molecular salt in aqueous mixtures were frequently investigated.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Polyelectrolyte–surfactant complexes (PSCs) have been studied intensively during the last decades. Dissolved in water polyelectrolytes and oppositely charged surfactants form a manifold of aggregates. , Depending on overall concentrations, on the chemical nature, and on molar ratios of polyelectrolyte and surfactant, these aggregates differ in size, shape, and lyotropic liquid crystalline structure. Also, phase equilibria and the influence of low molecular salt in aqueous mixtures were frequently investigated. , In the case of fully compensated charges, PSCs generally precipitate, yielding liquid crystalline solids.…”

Section: Introductionmentioning

confidence: 99%

Mesogenic Structures, Lyotropic and Thermotropic Phase Transitions in Demethyl-Ionene Alkyl Sulfonate Complexes

et al. 2015

View full text Add to dashboard Cite

Linear [B,10]-polyamines [(CH2)BN(CH3)(CH2)10N(CH3)] were prepared (B = 3 or 6). Protonated by stoichiometric amounts of n-alkylsulfonic acids, they form demethyl-ionene sulfonate complexes, which proved thermally stable up to 220 °C. Salt free complexes were investigated by polarized microscopy, thermogravimetry, and X-ray diffraction. Except the heptyl sulfonate, which crystallized, all complexes bearing longer alkyl chains formed mesogenic phases. Being isotropic in dry state, they became optically anisotropic when exposed to humidity due to a lyotropic transition (mediated by the gas phase) to a hexagonal phase, mostly. A cubic phase containing less water was also observed. Anisotropic complexes again were converted to an isotropic state upon heating under controlled humidity. The clearing temperatures distinctly depend on humidity and rise with increasing length of the alkyl sulfonate. This may allow the use of the complexes as humidity sensors. Oriented liquid crystalline samples are formed upon fast cooling in flat capillaries.

show abstract

Polyelektrolyt‐Tensidionen‐Komplexe (Literaturübersicht). Teil II. Komplexbildung zwischen anionischen Polyelektrolyten und Kationtensiden

Cited by 4 publications

References 44 publications

Formation of metal-oxygen surface compounds on copper, silver, and gold electrodes via electrochemical oxidation of hydroxide ion and autoxidation in acetonitrile

Formation of metal-oxygen surface compounds on copper, silver, and gold electrodes via electrochemical oxidation of hydroxide ion and autoxidation in acetonitrile

Polyelektrolyt‐Tensidionen‐Komplexe (Literaturübersicht). Teil III: Komplexbildung mit Polyampholyten und Polypeptiden sowie zusammenfassende Auswertung der Studie

Mesogenic Structures, Lyotropic and Thermotropic Phase Transitions in Demethyl-Ionene Alkyl Sulfonate Complexes

Contact Info

Product

Resources

About