Download e-book for iPad: Anion Coordination Chemistry by

ISBN-10: 3527323708

ISBN-13: 9783527323708

ISBN-10: 3527639500

ISBN-13: 9783527639502

Development at the pioneering paintings in supramolecular chemistry from the final two decades or so, this monograph addresses new and recent
techniques to anion coordination chemistry. Synthesis of receptors, organic receptors and metallareceptors, the energetics of anion binding, molecular constructions of anion complexes, sensing units are offered and computational reports addressed to help with the knowledge of different riding forces chargeable for anion complexation. The reader is promised a precise photograph of the cutting-edge for this interesting and continuously evolving box of supramolecular anion coordination chemistry. the themes variety from ion channels to selective
sensors, making it beautiful to all researchers and PhD scholars with an curiosity in supramolecular chemistry.Content:
Chapter 1 facets of Anion Coordination from ancient views (pages 1–73): Prof. Dr. Antonio Bianchi, Prof. Dr. Kristin Bowman?James and Prof. Dr. Enrique Garcia?Espana
Chapter 2 Thermodynamic facets of Anion Coordination (pages 75–140): Prof. Dr. Antonio Bianchi and Prof. Dr. Enrique Garcia?Espa?na
Chapter three Structural facets of Anion Coordination Chemistry (pages 141–225): Rowshan Ara Begum, Sung okay Kang, Victor W. Day and Prof. Dr. Kristin Bowman?James
Chapter four artificial techniques (pages 227–287): Andrea Bencini and Jose M. Llinares
Chapter five Template Synthesis (pages 289–320): Jack ok. Clegg and Leonard F. Lindoy
Chapter 6 Anion–? Interactions in Molecular popularity (pages 321–361): David Qui?nonero, Antonio Frontera and Pere M. Deya
Chapter 7 Receptors for Biologically appropriate Anions (pages 363–464): Stefan Kubik
Chapter eight man made Amphiphilic Peptides that Self?Assemble to Membrane?Active Anion Transporters (pages 465–519): George W. Gokel and Megan M. Daschbach
Chapter nine Anion Sensing by means of Fluorescence Quenching or Revival (pages 521–552): Valeria Amendola, Luigi Fabbrizzi, Maurizio Licchelli and Angelo Taglietti

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137] were, in 1990, the first to evidence a fluoride anion residing in the central hole of a sapphyrin, a 22-π-electron pentapyrrolic expanded porphyrin (28–31). 2 Halide and Pseudohalide Anions N H R1 R2 N H N N H N R1 R2 R3 28 R1 = CH3, R2 = H, R3 = H 29 R1 = H, R2 = CH3, R3 = CH3 30 R1 = H, R2 = CO2Et, R3 = CH3 31 R1 = H, R2 = CO2Et, R3 = CH3 Treatment of sapphyrin (28) as its free base with aqueous HCl in dichloromethane followed by adding silver hexafluorophoshate and crystallizing by vapor diffusion led to the isolation of the diprotonated macrocycle with just one hexafluorophosphate counteranion and another anion located at the center of the macrocyclic hole.

A study on the thermodynamic terms affecting the interaction of polyammonium receptors either of cyclic or acyclic nature with phosphate and pyrophosphate anions in aqueous solution indicated that there were five modes of hydrogen bond motifs in such systems [170, 171]; four of them involve ammonium or amine groups as donors (types I–IV), and just one involves amine groups as hydrogen bond acceptors (type V): −N–H · · · · ·− O– H0 > 0, + H > 0, −N–H · · · OH– 0 T S0 > 0 T S ≈0 0 I II −N–H · · · − O– H0 > 0, T S0 ≈ 0 III −NH · · · OH– H0 > 0, T S0 < 0 IV H < 0, T S <0 V − −N · · · H–O 0 0 Binding mode I leading to hydrogen-bonded ion pair interactions should be of great importance in association processes occurring in solvents with high dielectric constant, such as water, since they provide synergetic hydrogen bonding and electrostatic attraction.

2). Although all the reactions show slightly exothermic enthalpy terms, the enthalpy changes for (H9 [27]aneN9 )9+ , (H10 [30]aneN10 )10+ , and H11 ([33]aneN11 )11+ are significantly more favorable than for the others. 1 M HCl in a BATCH microcalorimeter [192, 193]. 48 Drawing of the cation [(PdCl4 )(H10 [30]aneN10 )]8+ . Hydrogen bonding is indicated with blue dotted lines. Hydrogen atoms are not shown [192, 193]. experimental evidences suggest that H27 ([27]aneN9 )9+ was the first term of the series for which inclusion of the PdCl4 2− within the macrocyclic cavity occurred.

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Anion Coordination Chemistry


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