Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 412258
Title Effect of pH on complex coacervate core micelles from Fe(III)-based coordination polymer
Author(s) Wang Junyou, Junyou; Keizer, A. de; Leeuwen, H.P. van; Yan Yun, ; Vergeldt, F.J.; As, H. van; Bomans, P.H.H.; Sommerdijk, N.A.J.M.; Cohen Stuart, M.A.; Gucht, J. van der
Source Langmuir 27 (2011). - ISSN 0743-7463 - p. 14776 - 14782.
Department(s) Physical Chemistry and Colloid Science
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) polyelectrolyte-amphiphile complex - block-copolymers - phase-transition - spin-crossover - iron(iii) - particles - aggregation - relaxation - scattering - stability
Abstract The effect of pH on iron-containing complex coacervate core micelles [Fe(III)–C3Ms] is investigated in this paper. The Fe(III)–C3Ms are formed by mixing cationic poly(N-methyl-2-vinylpyridinium iodide)-b-poly(ethylene oxide) [P2MVP41-b-PEO205] and anionic iron coordination polymers [Fe(III)–L2EO4] at stoichiometric charge ratio. Light scattering and Cryo-TEM have been performed to study the variations of hydrodynamic radius and core structure with changing pH. The hydrodynamic radius of Fe(III)–C3Ms is determined mainly by the corona and does not change very much in a broad pH range. However, Cryo-TEM pictures and magnetic relaxation measurements indicate that the structure of the micellar cores changes upon changing the pH, with a more crystalline, elongated shape and lower relaxivity at high pH. We attribute this to the formation of mixed iron complexes in the core, involving both the bis-ligand and hydroxide ions. These complexes are stabilized toward precipitation by the diblock copolymer.
There are no comments yet. You can post the first one!
Post a comment
Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.