Polyamines containing naphthyl groups as pH-regulated molecular machines driven by light

A series of compounds made up by linking methylnaphthalene, fragments at bo th ends of different polyamine chains have shown to behave as pH-regulated molecular machines driven by light and fluorescence emission studies have p roved the formation of an excimer between the two naphthalene units whose a ppearance, fluorescence intensity and decay times depend on the pH value of the media.