Structural and fluorescence properties of phenolphthalein bridged cyclotriphosphazatrienes

Abstract

This study dealt with the reactions of hexachlorocyclotriphosphazatriene, N 3P 3Cl 6 (trimer) ( 1) with phenolphthalein ( 2) to give the phenolphthalein bridged compounds 3, 4 and 5. The phenolphthalein bridged cyclotriphosphazatriene derivatives are reported for the first time. The new compounds ( 3– 5) are characterized by elemental analysis, mass spectrometry, UV–vis, FT-IR, 1H, 31P NMR and fluorescence spectroscopy. The more bridged phenolphthalein groups show the higher intensity of the absorption bands in the UV–vis spectra. Fluorescence spectrum of compound 3 shows a small band in the lower spectral range, while the spectra of compounds 4 and 5 show more intense and a band in higher spectral range.