A fluorescence based dual sensor for Zn2+ and PO43− and the application of soft computing methods to predict machine learning outcomes

A phenolphthalein-based Schiff base, 3,3-bis-{4-hydroxy-3-[(pyridine-2-ylmethylimino)-methyl]-phenyl}-3 H -isobenzofuran-1-one (PAP), has been synthesized and used for selective fluorescence ‘turn on’ and ‘turn off’ sensing of Zn 2+ and PO 4 3− , respectively.