Organometallic anion receptors

Keywords Anion sensing - Anion recognition Anion coordination - Anion receptors -Organometallic receptors... 

Keywords Anion recognition Organometallic receptors Transition metal receptors Electrochemical sensors Optical sensors... 

Anion receptors incorporating cobaltocenium have been studied extensively due to the combination of an accessible redox couple and potential favourable electrostatic interactions of the cationic organometallic metallocene complex with anions. The first anion receptor based on this species was reported by Beer and co-workers in 1989 [6]. The macrocyclic bis-cobaltocenium receptor 1 was shown to bind (via electrostatic interaction) and to electro chemically sense bromide in acetonitrile solvent media. 

As will be illustrated, the use of inorganic and organometallic chemistry has, in the past 10 years, enabled the development of a rich and exciting range of novel, functional anion receptors. Inorganic anion receptors can be usefully subdivided into four classes dependent on the bonding interactions responsible for anion binding ... 

Ferrocene-functionalized dendrimers and gold nanoparticles, for instance, have been found to exhibit significantly enhanced binding of anions. Self-assembled monolayers of organometallic receptors on electrode surfaces similarly exhibit amplified anion binding. Organometallic dendrimers have also been used in SO2 gas detection. 

Anion-Directed Assembly, p. 5i Guanidinium-Based Anion Receptors, p. 615 Hydrogen Bonding, p. 658 Organometallic Anion Receptors, p. 1006 Protonated Aza-Macrocycles for Anion Complexation, p. 1170... 

Fluorescence Sensing of Anions, p. 566 Guanidium-Based Anion Receptors, p. (575 Halogen Bonding, p. 628 Macrocyclic Synthesis, p. 830 Molecular Squares, Boxes, and Cubes, p. 909 Naked Anion Effect, p. 939 Organometallic Anion Receptors, p. 1006 Rotaxanes and Pseudorotaxanes, p. 1194 Self-Assembly Definition and Kinetic and Thermodynamic Considerations, p. 1248 The Template Effect, p. 1493... 

Organometallic Anion Receptors, p. 1056 Protonated Aza-Macrocycles for Anion Complexation, p. 1175... 

Carcerands and Hemicarcerands, p. 189 Concave Reagents, p. i /1 Crown Ethers, p. 326 Cryptophanes, p. 340 Cyclodextrins, p. 398 Cyclodextrins, Applications, p. 405 Cyclophanes Definition and Scope, p. 414 Enzyme Mimics, p. 546 Macrocycle Synthesis, p. 830 Organometallic Anion Receptors, p. 1006 Soft and Smart Materials, p. 1302 X-Ray Crystallography, p. 1586... 

Fluorescent Sensors, p. 572 Ion-Selective Electrodes, p. 747 Organometallic Anion Receptors, p. 1006... 

Beer. P.D. Hesek. D. Nam. K.C. Drew. M.G.B. Anion recognition properties of new upper-rim cobaltocenium calix[4]arene receptors. Organometallics 1999. IS. 3933-3943. 

Organometallic groups such as ferrocene and cobaltoce-nium lend themselves extremely well to the synthesis of anion receptors Their relative ease of substitution led... 

Molecular Clefts and Tweezers, p. 887 Organometallic Anion Receptors, p. 1006 Phase-Transfer Catalysis in Environmentally Benign Reaction Media, p. 1042 Siderophores, p. 1278 Swfactants, Part 1 Fundamentals, p. 1458 Surfactants, Part 11 Applications, p. 1470 The Template Effect, p. 1493... 

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