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Intermolecular interactions involving oligopeptides or protein fragments are important supramolecular events responsible for a variety of biochemical and medicinal processes. Therefore, artificial peptide receptors are not only interesting as model systems for studying the principles of the underlying supramolecular recognition event but also as starting points for the development of sensors or drug candidates.[1] For this purpose strong complexation of the given target peptide by the artificial host under physiological conditions (in water) is necessary. This is, however, quite challenging.[2, 3] On the one hand, hydrophobic interactions, which are especially important in water, are rather nonspecific, making the design of selective host molecules difficult.[4] On the other hand, electrostatic interactions such as ion pairs and H bonds, which as a result of their specificity and in the case of H bonds also directionality [5] are …