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Exploring the Loading Capacity of Generation Six to Eight Dendronized Polymers in Aqueous Solution

Maltar-Strmečki, Nadica; Yu, Hao; Messmer, Daniel; Zhang, Baozhong LU ; Schlüter, A. Dieter and Hinderberger, Dariush (2016) In ChemPhysChem 17(17). p.2767-2772
Abstract

Aspects of size, structural (im)perfection, inner density, and guest molecule loading capacity of dendronized polymers (DPs) of high generation (6≤g≤8) in aqueous solution are studied using electron paramagnetic resonance spectroscopy on amphiphilic, spin-labeled guest molecules. The results show that the interior of the charged DPs is strongly polar, especially in comparison to their lower generation (1–4) analogues. This is a direct sign that large amounts of water penetrate the DP surface, reflecting the structural (im)perfections of these high-generation DPs and much lower segmental densities than theoretically achievable. Images obtained with atomic force microscopy reveal that the high-generation DPs do not aggregate and give... (More)

Aspects of size, structural (im)perfection, inner density, and guest molecule loading capacity of dendronized polymers (DPs) of high generation (6≤g≤8) in aqueous solution are studied using electron paramagnetic resonance spectroscopy on amphiphilic, spin-labeled guest molecules. The results show that the interior of the charged DPs is strongly polar, especially in comparison to their lower generation (1–4) analogues. This is a direct sign that large amounts of water penetrate the DP surface, reflecting the structural (im)perfections of these high-generation DPs and much lower segmental densities than theoretically achievable. Images obtained with atomic force microscopy reveal that the high-generation DPs do not aggregate and give further insights into the structural imperfections. Electron paramagnetic resonance spectroscopic data further show that despite their structural imperfections, these DPs can bind and release large numbers of amphiphilic molecules. It is concluded that attention should be paid to their synthesis, for which a protocol needs to be developed that avoids the relatively large amount of defects generated in the direct conversion of a generation g=4 DP to a generation g=6 DP, which had to be used here.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
dendronized polymers, ESR/EPR spectroscopy, host–guest interactions, macromolecules, spin labels
in
ChemPhysChem
volume
17
issue
17
pages
6 pages
publisher
John Wiley & Sons
external identifiers
  • scopus:84985911659
  • wos:000383593900020
ISSN
1439-4235
DOI
10.1002/cphc.201600580
language
English
LU publication?
yes
id
48e63e9e-5167-481b-ae30-ab19bf3868e8
date added to LUP
2016-11-09 11:41:55
date last changed
2017-03-28 12:37:31
@article{48e63e9e-5167-481b-ae30-ab19bf3868e8,
  abstract     = {<p>Aspects of size, structural (im)perfection, inner density, and guest molecule loading capacity of dendronized polymers (DPs) of high generation (6≤g≤8) in aqueous solution are studied using electron paramagnetic resonance spectroscopy on amphiphilic, spin-labeled guest molecules. The results show that the interior of the charged DPs is strongly polar, especially in comparison to their lower generation (1–4) analogues. This is a direct sign that large amounts of water penetrate the DP surface, reflecting the structural (im)perfections of these high-generation DPs and much lower segmental densities than theoretically achievable. Images obtained with atomic force microscopy reveal that the high-generation DPs do not aggregate and give further insights into the structural imperfections. Electron paramagnetic resonance spectroscopic data further show that despite their structural imperfections, these DPs can bind and release large numbers of amphiphilic molecules. It is concluded that attention should be paid to their synthesis, for which a protocol needs to be developed that avoids the relatively large amount of defects generated in the direct conversion of a generation g=4 DP to a generation g=6 DP, which had to be used here.</p>},
  author       = {Maltar-Strmečki, Nadica and Yu, Hao and Messmer, Daniel and Zhang, Baozhong and Schlüter, A. Dieter and Hinderberger, Dariush},
  issn         = {1439-4235},
  keyword      = {dendronized polymers,ESR/EPR spectroscopy,host–guest interactions,macromolecules,spin labels},
  language     = {eng},
  month        = {09},
  number       = {17},
  pages        = {2767--2772},
  publisher    = {John Wiley & Sons},
  series       = {ChemPhysChem},
  title        = {Exploring the Loading Capacity of Generation Six to Eight Dendronized Polymers in Aqueous Solution},
  url          = {http://dx.doi.org/10.1002/cphc.201600580},
  volume       = {17},
  year         = {2016},
}