COMPOSITIONS OF MECHANICALLY INTERLOCKED, TOPOLOGICALLY COMPLEX CROSSLINKERS AND POLYMERS AND METHODS OF MAKING AND USING SAME
申请人:Washington University
公开号:US20220119435A1
公开(公告)日:2022-04-21
Among the various aspects of the present disclosure is the provision of compositions of mechanically interlocked, topologically complex crosslinkers and polymers and methods of making and using same.
Boronic ester-substituted terpyridine metal complex as a novel fluoride-sensitive redox receptor
作者:B Fabre、U Lehmann、A.D Schlüter
DOI:10.1016/s0013-4686(01)00492-3
日期:2001.5
The boronic ester-disubstituted terpyridine 1 Fe(II) complex [Fe(II)1(2)](2+) has been used as a redox-active receptor for fluoride. Upon binding of F- to the boronic ester moieties, the Fe(II)/Fe(III) oxidation peak of this metal complex is shifted toward less positive potentials. The magnitude of the shift (around 160 mV) is much larger than that measured with Cl- (20 mV) whereas other anionic species (i.e. Br-, NO3- and SO42-) do not interact. Such a variation is consistent with a more than 500-fold increase of the F--binding constant upon the oxidation of Fe(II) to Fe(III). Further UV-Vis spectroscopy data would indicate the formation of two complexes of stoichiometries 1:1 and 1:2 (receptor:fluoride), successively. (C) 2001 Elsevier Science Ltd. All rights reserved.