English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Interactions of poly(amidoamine) dendrimers with the surfactants SDS, DTAB, and C12EO6. An equilibrium and structural study using a SDS selective electrode. Isothermal titration calorimetry and small angle neutron scattering

Sidhu, J., Bloor, D. M., Couderc-Azouani, S., Penfold, J., Holzwarth, J. F., & Wyn-Jones, E. (2004). Interactions of poly(amidoamine) dendrimers with the surfactants SDS, DTAB, and C12EO6. An equilibrium and structural study using a SDS selective electrode. Isothermal titration calorimetry and small angle neutron scattering. Langmuir, 20(21), 9320-9328. doi:10.1021/la0494932.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Sidhu, Jagraj, Author
Bloor, Derek M., Author
Couderc-Azouani, Sabine1, Author           
Penfold, Jeffery, Author
Holzwarth, Josef F.1, Author           
Wyn-Jones, Evan, Author
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

Content

show
hide
Free keywords:
 Abstract: Interactions in aqueous solutions of different generations of poly(amidoamine) (PAMAM) dendrimers containing amine, hydroxyl, or -glucolactone functional groups at the periphery with the anionic surfactant sodium dodecyl sulfate (SDS) were investigated. We used a SDS-specific electrode (EMF) for SDS monomer concentration monitoring, isothermal titration calorimetry (ITC) for binding information, and small angle neutron scattering (SANS) for structural studies. ITC experiments monitoring the interaction of the dendrimers with cationic dodecyltrimethylammonium bromide (DTAB) and nonionic hexaethylene glycol mono-n-dodecyl ether (C12EO6) showed no significant binding effects. In contrast, SDS binds to all of the above dendrimers. EMF and ITC data demonstrated a regular trend for both the onset of binding and binding saturation as the generation in each family of dendrimers increased. In addition, generation G6 exhibited a noncooperative binding process at very low SDS concentrations. Furthermore, the onset of cooperative binding in the EMF experiments started at lower concentrations as the weight % (w/v), the size, and the numbers of the internal or surface groups increased. On the other hand, the binding capacity of the dendrimers showed only a small dependence on the above parameters. At SDS concentrations approaching the binding limit and also at selective concentrations within the binding range, SANS measurements indicated that in all cases the bound surfactant is in the micellar form. From the electromotive force (EMF) measurements, ITC data, and SANS data, the stoichiometry of the supramolecular complexes was determined.

Details

show
hide
Language(s): eng - English
 Dates: 2004-09-04
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 211192
DOI: 10.1021/la0494932
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Langmuir
  Alternative Title : Langmuir
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 20 (21) Sequence Number: - Start / End Page: 9320 - 9328 Identifier: -