Two Types of Block Copolymer Micelles with Ion-Containing Cores

Date

2010-03-02

Author

Erel Göktepe, İrem
Sukhishvili, Svetlana
PATYUKOVA, Elena
Potemkin, Igor
KRAMARENKO, Elena

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

81
views

0
downloads

We report a combined experimental and theoretical study of micellization of block copolymer with hydrophilic nonionic corona-forming blocks and weak polyelectrolyte (wPE) core-forming blocks with pH-triggered solubility in aqueous solutions. We demonstrate that in addition to micelles with neutral cores, there exist two other types of micelles with PE- or ionomer-like cores, in which monovalent counterions are released or condensed on core wPE block, respectively. The transition between the two types of micelles occurred upon changes in ionization of the PE core block and resulted in nonmonotonous changes of aggregation number as a function of pH. Such micelles with stimulus responsive cores represent promising nanocarriers for controlled delivery applications.

Subject Keywords

Amphiphiles, Diblock copolymers, Micelles, Polyelectrolytes, Self-assembly

URI

https://hdl.handle.net/11511/33032

Journal

MACROMOLECULAR RAPID COMMUNICATIONS

DOI

https://doi.org/10.1002/marc.200900659

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Optimization of conditions in sulfuric acid leaching of Turkish chromite concentrates Ustaoğlu, Emre; Geveci, Ahmet; Department of Metallurgical and Materials Engineering (2006) In this thesis work, a high grade chromite concentrate obtained from Pınarbaşı, Kayseri region of Turkey was reacted with sulfuric acid solution to determine the optimum conditions of leaching of chromite ores. Conventional methods for producing chromium are still valid in industry. The main process in production includes soda melting and taking it into solution in the form of chemical compounds such as sodium dichromate. Three and six valence states of chromium have importance in production. Trivalent chro...
Synthesis and Optoelectronic Properties of Janus-Dendrimer-Type Multivalent Donor Acceptor Systems Dengiz, Çağatay; GISSELBRECHT, Jean-Paul; BOUDON, Corinne; TRAPP, Nils; SCHWEIZER, W. Bernd; DIEDERICH, Francois (2015-01-16) A convergent, multistep protocol was employed for the synthesis of a Janus-type multivalent donoracceptor system. The synthetic approach is based on a Sonogashira cross-coupling of two differently ferrocene-(Fc) substituted dendrons and a final sixfold [2 + 2] cycloaddition-retroelectrocyclization (CA-RE) reaction with tetracyanoethene, which occurs regioselectively at only one of the rigidly linked dendrons. The structural and optoelectronic properties of the compounds were investigated by X-ray analysis, ...
A New Voltammetric Method for the Determination of Lercanidipine in Biological Samples Ozturk, Funda; Tasdemir, Ibrahim Hudai; Altunöz Erdoğan, Deniz; Erk, Nevin; Kilic, Esma (2011-01-01) Electrochemical behavior and adsorption-diffusion properties of lercanidipine (LCN) on a glassy carbon electrode (GCE) were investigated in a mixture of ethanol-Britton Robinson buffer (BR) using voltammetric methods. From experimental results LCN was found to be reduced irreversibly via a single four-electron process controlled mainly by diffusion with some adsorption contribution at about -0.65 V (vs. Ag/AgCl reference electrode). Therefore, a new, accurate, rapid, selective and simple square-wave cathodi...
A periodic DFT study of water and ammonia adsorption on anatase TiO2 (001) slab Erdogan, Rezan; Ozbek, Olus; Önal, Işık (2010-06-15) Water and ammonia adsorption mechanisms on anatase TiO2 (001) slab surface are investigated by means of periodic DFT approach. Molecular and dissociative adsorption energies for water are calculated to be -15 kcal/mol and -32 kcal/mol, respectively. Similarly, molecular and dissociative adsorption energies of ammonia on the same surface are found as 25 kcal/mol and 20 kcal/mol. A reverse result in this order is reached for the previous case of ONIOM cluster study (23 kcal/mol and 37 kcal/mol, respectively)....
Novel conversion of thiols into disulfides, via S-nitrosothiol intermediates using trichloronitromethane Demir, Ayhan Sıtkı; Igdir, AC; Mahasneh, AS (1999-10-15) An efficient oxidative coupling of thiols to give disulfides via thionitrite (S-nitrosothiol) intermediate is described using trichloronitromethane as an efficient reagent in organic solvents and water. Cysteine and glutathione are converted into the corresponding disulfides in water in high yields.

Citation Formats

İ. Erel Göktepe, S. Sukhishvili, E. PATYUKOVA, I. Potemkin, and E. KRAMARENKO, “Two Types of Block Copolymer Micelles with Ion-Containing Cores,” MACROMOLECULAR RAPID COMMUNICATIONS, pp. 490–495, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33032.