Ultra-high molecular weight linear coordination polymers with terpyridine ligands

Chemical Science
Reece W LewisNeil R Cameron

Abstract

Ultra-high molecular weight (UHMW, Mn > 1000 kDa) polymeric drift control adjuvants (DCAs) for agricultural spraying are prone to mechanical degradation and rapidly lose performance. To overcome this, we have designed linear coordination polymers (LCPs) composed of 400 kDa telechelic bis-terpyridine end-functionalised polyacrylamide units, which 'self-heal' upon shearing through reformation of coordination bonds. After addition of Fe(ii) to dilute aqueous solutions of the terpyridine telechelics, UHMW LCPs were obtained as demonstrated by UV-vis spectroscopy, MALS GPC and intrinsic viscosity measurements. Importantly, these UHMW LCPs were shown to function as effective DCAs, reducing the formation of fine 'driftable' droplets during spray testing at concentrations as low as 100 ppm. Following mechanically-induced coordination bond-scission, the UHMW LCPs were found to recover up to 90% of their performance compared to un-sheared samples, at a rate dependent on the transition metal ion used to form the complex.

References

Aug 14, 2003·Chemistry : a European Journal·Christine GozeRaymond Ziessel
Aug 19, 2004·Angewandte Chemie·Jos M J Paulusse, Rint P Sijbesma
Feb 3, 2007·Journal of the American Chemical Society·Jos M J PaulusseRint P Sijbesma
Sep 20, 2008·Chemical Communications : Chem Comm·Jos M J Paulusse, Rint P Sijbesma
Oct 29, 2010·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Allan S FelsotElizabeth Carazo
Nov 16, 2010·Chemical Society Reviews·Si Kyung YangMarcus Weck
May 6, 2011·Journal of the American Chemical Society·Gerd GrögerCarsten Schmuck
Jun 28, 2014·Journal of the American Chemical Society·Diederik W R BalkenendeChristoph Weder
Nov 2, 1998·Angewandte Chemie·Markus SchütteHelmut Möhwald

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Citations

Aug 7, 2020·Macromolecular Rapid Communications·Reece W LewisRichard A Evans

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Methods Mentioned

BETA
NMR
Light Scattering

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