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COMMUNICATION
Journal Name
concentration of catalytically active centers within the 14.
microgel is probably smaller than presumed which is shown by
990.
R. Borrmann, V. Palchyk, A. Pich and M. Rueping, ACS
Catal., 2018, 8, 7991-7996.
M. Karg, A. Pich, T. Hellweg, T. Hoare, L. A. Lyon, J. J.
Crassous, D. Suzuki, R. A. Gumerov, S. Schneider, I.
Potemkin and W. Richtering, Langmuir, 2019, 35, 6231-
2
DOI: 10.1039/D0CC02433C
1
5.
ICP-MS analysis. Hence, the presented microgel catalyst is
even more active in comparison to the copper complex and
copper salt which have a concentration of 5mol% (see SI Table
S8-S10).
1
6.
In conclusion, we showed the successful functionalization of
pVCL-GMA microgels with an amine ligand which subsequently
forms and stabilizes bio-inspired copper(I) complexes within
6
255.
S. Seiffert, Angew. Chem. Int. Ed. Engl., 2013, 52, 11462-
1468.
1
7.
1
the microgels. These copper complex containing microgels 18.
enhance the catalytic activity of the chosen complex in the 19.
aerobic oxidation of benzyl alcohols in DMSO. Due to the very
W. Richtering, Langmuir, 2012, 28, 17218-17229.
F. A. Plamper and W. Richtering, Acc. Chem. Res., 2017,
50, 131-140.
20.
21.
22.
W. Richtering and A. Pich, Soft Matter, 2012, 8, 11423–
small amount of active centers as evidenced by ICP-MS, the
catalytic activity of the Cu@pVCL-GMA-BPM microgels is even
higher in comparison to CuCl and the CuCl BPM complex.
Therefore, the unique properties of microgels and tailor-made
environments inside the microgel framework offer new
possibilities for the immobilization of metal complexes and
their improvement to higher yields and conversions. Further
work will concentrate on the optimization of the microgel
functionalization with the amine ligand, investigations about
1
1430.
A. Pich and W. Richtering, Chemical Design of Responsive
Microgels, Springer-Verlag Berlin Heidelberg, 2011.
W. Xu, A. A. Rudov, R. Schroeder, I. V. Portnov, W.
Richtering, I. Potemkin and A. Pich, Biomacromolecules,
2
019, 20, 1578-1591.
2
3.
J. Dubbert, T. Honold, J. S. Pedersen, A. Radulescu, M.
Drechsler, M. Karg and W. Richtering, Macromolecules,
2014, 47, 8700-8708.
the exact localization of copper complexes within the microgel, 24.
the recycling of the catalyst and on using the catalytically
active microgels on a broader range of reactions.
A. Hoffmann, S. Binder, A. Jesser, R. Haase, U. Flörke, M.
Gnida, M. Salomone Stagni, W. Meyer-Klaucke, B.
Lebsanft, L. E. Grünig, S. Schneider, M. Hashemi, A. Goos,
A. Wetzel, M. Rübhausen and S. Herres-Pawlis, Angew.
Chem. Int. Ed. Engl., 2014, 53, 299-304.
The authors thank Sonderforschungsbereich SFB 985 (project
A1) “Functional Microgels and Microgel Systems” of DFG
2
2
5.
6.
A. Hoffmann and S. Herres-Pawlis, Chem. Commun., 2014,
Deutsche Forschungsgemeinschaft, Volkswagen Foundation
and Center for Chemical Polymer Technology CPT, which was
supported by the EU and the federal state of North Rhine-
Westphalia (grant EFRE 30 00 883 02). We also thank Julia
Nießen for carrying out the ICP-MS measurements.
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0, 403-405.
C. Wilfer, P. Liebhäuser, A. Hoffmann, H. Erdmann, O.
Grossmann, L. Runtsch, E. Paffenholz, R. Schepper, R.
Dick, M. Bauer, M. Dürr, I. Ivanović-Burmazović and S.
Herres-Pawlis, Chem. Eur. J., 2015, 21, 17639-17649.
P. Liebhäuser, K. Keisers, A. Hoffmann, T. Schnappinger, I.
Sommer, A. Thoma, C. Wilfer, R. Schoch, K. Stührenberg,
M. Bauer, M. Dürr, I. Ivanović-Burmazović and S. Herres-
Pawlis, Chem. Eur. J., 2017, 23, 12171-12183.
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