By Franz P. Schmidtchen (auth.), Ivan Stibor (eds.)
This treatise on anion sensing and popularity represents a brand new addition to a truly small variety of books during this area......
Although this Topics volume doesn't disguise the entire varied periods fo receptors, it does offer new and well timed views to anion chemistry by means of highlighting a number of parts which were ordinarily ignored in different studies. the person chapters are well-written and comprise references from previous works as much as the current. As such, this quantity might be of curiosity to the neighborhood of researchers drawn to anions in addition to to those that desire to find out about the host-guest chemistry of anion attractiveness and its applications.
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Extra resources for Anion Sensing: -/-
Zlatušková Amidic groups were also incorporated into the structure of receptor 37 . This receptor was used for the complexation of substrates capable of quick interchange between their conformational enantiomers in solution. These guests can be fixed in the cavity of 37 predominantly in one of the possible enantiomeric conformations. Using CD spectroscopy, an increase in the amount of (S)-helical bilirubin (BR) conformer upon addition of (+)-37 was observed. The (R)-helical conformer was preferred on adding (–)-37.
Both recognition structural units have been changed. The aromatic naphthoyl group has been substituted with the bulkier diphenyl-tertbutylsilyl group and the aza-18-crown-6 unit by a symmetrical triaza analog that is known to recognize the ammonium cation with high selectivity against alkali metal cations. This compound was capable of discrimination between enantiomers of phenylalanine. The L-enantiomer was extracted into chloroform with 40% ee in a wide pH range. When the analog of 13 without the azamacrocycle in its structure was used, no chiral recognition was observed.
Stibor · P. Zlatušková Marchelli used the copper(II) complex of histamine-functionalized b-cyclodextrin for chiral recognition and separation of amino acids . The best results were obtained for aromatic amino acids (Trp). Enantioselective sensing of amino acids by copper(II) complexes of phenylalanine-based fluorescent b-cyclodextrin has been recently published by the same author [28, 29]. The host containing a metal-binding site and a dansyl fluorophore was shown to form copper(II) complexes with fluorescence quenching.
Anion Sensing: -/- by Franz P. Schmidtchen (auth.), Ivan Stibor (eds.)