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AND/NOT Sensing of Fluoride and Cyanide Ions by Ferrocene‐Derivatised Lewis Acids
Author(s) -
Broomsgrove Alexander E. J.,
Addy David A.,
Bresner Christopher,
Fallis Ian A.,
Thompson Amber L.,
Aldridge Simon
Publication year - 2008
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.200801381
Subject(s) - cyanide , fluoride , chemistry , lewis acids and bases , ferrocene , boronic acid , ion , inorganic chemistry , electrochemistry , combinatorial chemistry , electrode , organic chemistry , catalysis
A simple two‐component sensor system was developed, featuring the strongly Lewis acidic (but air‐stable) Fc R BMes 2 ( 1 : Fc R =(η 5 ‐C 5 H 4 )Fe(η 5 ‐C 5 R 5 ), R=H, Me; Mes=2,4,6‐Me 3 C 6 H 2 ), which can be shown to bind both fluoride AND cyanide in solution (but not other anions), and the weaker boronic ester Lewis acid Fc R B(OR) 2 ( 2 : (OR) 2 = R , R ‐OC(H)PhC(H)PhO), which signals the presence of fluoride but NOT cyanide in solution. By coupling the electrochemical shifts with a suitable redox‐active tetrazolium dye, a colorimetric AND/NOT sensor system for fluoride and cyanide ions can be developed (see picture).