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Statements

Subject Item
n2:RIV%2F61389013%3A_____%2F11%3A00365712%21RIV12-AV0-61389013
rdf:type
skos:Concept n5:Vysledek
dcterms:description
Temperature-induced micellization of CAE-85, a carboxylic acid end-standing derivative of a copolymer Pluronic P85, was studied by attenuated total reflectance Fourier-transform infrared spectroscopy and density functional theory model calculations. In polymer micelles, carboxyl end groups dissociated in a two stage process. The first stage of deprotonation appeared with the onset of micellization – in agreement with predictions of existing models and theories for ionization processes in micellar corona. In micelles well above the critical micellization temperature, the degree of CAE-85 deprotonation increased to values significantly higher compared to unimer solution. Such deprotonation correlates well with formation of hydrogen bonded carboxyl end groups due to high density of chains in the corona of developing micelles. Thus, the proton dissociation constant, pKm, specific to the micellar form exists and is different from the proton dissociation constant of solution of unimers, pKa. Temperature-induced micellization of CAE-85, a carboxylic acid end-standing derivative of a copolymer Pluronic P85, was studied by attenuated total reflectance Fourier-transform infrared spectroscopy and density functional theory model calculations. In polymer micelles, carboxyl end groups dissociated in a two stage process. The first stage of deprotonation appeared with the onset of micellization – in agreement with predictions of existing models and theories for ionization processes in micellar corona. In micelles well above the critical micellization temperature, the degree of CAE-85 deprotonation increased to values significantly higher compared to unimer solution. Such deprotonation correlates well with formation of hydrogen bonded carboxyl end groups due to high density of chains in the corona of developing micelles. Thus, the proton dissociation constant, pKm, specific to the micellar form exists and is different from the proton dissociation constant of solution of unimers, pKa.
dcterms:title
Micellization-induced deprotonation of thermoresponsive surfactant CAE-85 — the telechelic carboxylic group derivative of Pluronic P85 Micellization-induced deprotonation of thermoresponsive surfactant CAE-85 — the telechelic carboxylic group derivative of Pluronic P85
skos:prefLabel
Micellization-induced deprotonation of thermoresponsive surfactant CAE-85 — the telechelic carboxylic group derivative of Pluronic P85 Micellization-induced deprotonation of thermoresponsive surfactant CAE-85 — the telechelic carboxylic group derivative of Pluronic P85
skos:notation
RIV/61389013:_____/11:00365712!RIV12-AV0-61389013
n5:predkladatel
n6:ico%3A61389013
n3:aktivita
n16:P n16:Z
n3:aktivity
P(GA203/08/0543), P(GA203/09/1478), Z(AV0Z40500505)
n3:cisloPeriodika
2
n3:dodaniDat
n14:2012
n3:domaciTvurceVysledku
n8:5292964 n8:1518755 n8:1926284 n8:5536898
n3:druhVysledku
n4:J
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n20:predkladatel
n3:idSjednocenehoVysledku
212264
n3:idVysledku
RIV/61389013:_____/11:00365712
n3:jazykVysledku
n7:eng
n3:klicovaSlova
pluronic; ATR FTIR; deprotonation
n3:klicoveSlovo
n17:deprotonation n17:ATR%20FTIR n17:pluronic
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[1BD4B4B370BD]
n3:nazevZdroje
Vibrational Spectroscopy
n3:obor
n18:CD
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n12:GA203%2F09%2F1478 n12:GA203%2F08%2F0543
n3:rokUplatneniVysledku
n14:2011
n3:svazekPeriodika
57
n3:tvurceVysledku
Šturcová, Adriana Braunová, Alena Pechar, Michal Dybal, Jiří
n3:wos
000296940700019
n3:zamer
n9:AV0Z40500505
s:issn
0924-2031
s:numberOfPages
6
n11:doi
10.1016/j.vibspec.2011.09.001