84183-96-0Relevant articles and documents
Anion templated double cyclization assembly of a chloride selective [2]catenane
Ng, Ka-Yuen,Cowley, Andrew R.,Beer, Paul D.
, p. 3676 - 3678 (2006)
The interweaving of two identical acyclic positively charged anion recognizing units around a chloride anion template leads to the formation of an orthogonal supramolecular ensemble which upon subsequent double ring cyclization gives a chloride selective
Synthesis of Crown Ether Polymers Incorporating 12- and 13-Membered Tetraoxa Rings Linked to Poly(propylene Oxide) and Poly(phosphazene) Backbones and Behaviour of the Lithium-doped Materials
Denness, James E.,Parker, David,Hubbard, Hugh St. V. A.
, p. 1445 - 1454 (2007/10/02)
The synthesis of a set of 12- and 13-membered crown ether polymers is reported.An oxyethylene chain separates the macrocyclic ring from either a poly(propylene oxide) or a poly(phosphazene) backbone.Addition of Li+ ions to these amorphous polymers and the related poly(methacrylate) polymers results in increases in Tg and the 12-O4 polymers show the largest increases.This behaviour is correlated with changes in the 13C NMR spectra of the polymers as Li+ is added, and the relative sensitivity of the 12-O4 polymers is related to their enhanced tendency to form 2:1 complexes (ring : Li+).Parallel observations were found on examination of the ionic conductivities of the lithium-doped materials, with the 13-O4 polymers showing lower conductivities and in the polypropylene oxide-based polymers the backbone did not contribute significantly to the overall charge transport.
