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Anion Sensing by Solution‐ and Surface‐Assembled Osmium(II) Bipyridyl Rotaxanes
Author(s) -
Lehr Joshua,
Lang Thomas,
Blackburn Octavia A.,
Barendt Timothy A.,
Faulkner Stephen,
Davis Jason J.,
Beer Paul D.
Publication year - 2013
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201302886
Subject(s) - rotaxane , cationic polymerization , osmium , cycloaddition , pyridinium , chemistry , electrochemistry , chloride , click chemistry , polymer chemistry , combinatorial chemistry , photochemistry , supramolecular chemistry , electrode , ruthenium , organic chemistry , molecule , catalysis
We report the preparation of [2]rotaxanes containing an electrochemically and optically active osmium(II) bipyridyl macrocyclic component mechanically bonded with cationic pyridinium axles. Such interlocked host systems are demonstrated to recognise and sense anionic guest species as shown by 1 H NMR, luminescence and electrochemical studies. The rotaxanes can be surface assembled on to gold electrodes through anion templation under click copper(I)‐catalysed Huisgen cycloaddition conditions to form rotaxane molecular films, which, after template removal, respond electrochemically and selectively to chloride.