Chalcogenide derivatives of 1,2,5-triphenyl-1H-phosphole: structure and photophysical properties

Chalcogenide derivatives of triphenylphosphole (oxide (1), sulfide (2) and selenide (3)) were synthesized and characterized by X-ray diffraction studies. Intermolecular interactions were observed in the bulk molecular packing in terms of hydrogen bonding for 1 or π–π stacking for 3. One of the useful applications of the chalcogenide derivatives of triphenylphosphole has been demonstrated utilizing the photophysical properties of 1 to detect aromatic nitro compounds through fluorescence quenching.