Abstract
In the present work, new cyclotriphosphazene derivatives, {[N3P3(biph)(R)4] (biph = 2′,2″-dioxy-1′,1″-biphenyl, R = imidazolyl (5) and benzimidazolyl (7)}, were synthesized for the first time. Both of these compounds (5 and 7) were fully characterized by elemental analysis, mass spectrometry and 1H and 31P NMR spectroscopy. The crystal structures of compounds 5 and 7 were determined by single-crystal X-ray crystallography. Furthermore, a second polymorph (triclinic form) of 2,2-monospiro-(2′,2″-dioxy-1′,1″-biphenyl)-4,4,6,6-tetrachlorocyclotriphosphazene (3) was isolated during the course of our study. UV–Vis absorption and fluorescence emission properties of 3, 5 and 7 were determined in a range of different solvents.
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