Self-assembled peptides are used for diverse applications in the biomedical and technological fields. The morphology and function of the assembled systems are dictated by the peptide sequence and length. In thiswork, a supramolecular catalyst was obtained up on self-assembly of the diphenylalanine peptide conjugated to a triphenylphosphineAu(I) complex in acetonitrile. The assembled molecules were characterized by spectroscopic techniques and by scanningel ectronmicroscopy.Theactivity of the catalyst was tested ontwo substrates in cyclization reactions.Themorphology and the dimensions of the assembled systems vary depending on the presence of a carboxyl versus anamideC-terminalend. The catalyst efficiently promotes intramo
lecularcyclization reactions. Results obtained encourage the use of self-assembled
peptides for the obtainment of new and efficient catalysts.

DOI:10.1002/psc.3630