Our last article is now online! On journal of Organic Chemistry, as Editor's choice and Open Access. "A unique and stable Polyproline I helix sorted out from confromational equilibrium by solvent polarity". It has been a beautiful adventure in collaboration with collegues of UniPisa and talented students. The rare Polyproline I has been uniquely isolated, in solution and in the solid phase, allowing for a fine characterization, which will be useful for future identification of naturally occurring PPI or in the design of structured peptide sequences. These findings could aid in the design of β-turns or β-hairpins or in the synthesis of macrocyclic peptides.