Abstract

STATUS QUO Molecular recognition is based on the interaction of ions or molecules and is thus the chemistry of noncovalent bonds such as hydrogen bonds, ionic or van der Waals interactions. Today, the rational design of an artificial receptor which selectively binds a given substrate in a polar solvent is still a challenging task for the following reasons: · quantitative aspects of non covalently controlled phenomena are poorly understood · even the qualitative nature of some non-covalent interactions is still under debate (e.g. low barrier hydrogen bonds, cation pinteractions) · few artificial receptors exist that work in solvents more polar than chloroform, because the strength of hydrogen bonds and ionic interactions decreases rapidly as the polarity of the surrounding solvent increases

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