Pyrene-BODIPY-substituted novel water-soluble cyclotriphosphazenes: synthesis, characterization, and photophysical properties

Abstract

In the present work, pyrene-boron-dipyrromethene (BODIPY)-substituted novel water-soluble cyclotriphosphazene derivatives (6 and 7) were synthesized by click reactions between a cyclotriphosphazene derivative with ahydrophilic glycol side group (2) and BODIPYs (4 and 5). All of the new compounds (2, 6, and 7) were characterizedby Fourier-transform infrared and nuclear magnetic resonance spectroscopy, as well as mass spectrometry and elementalanalysis. The photophysical properties of the BODIPY-substituted cyclotriphosphazenes (6 and 7) were investigatedby UV-Vis and fluorescence emission spectroscopy in water and water/solvent mixtures. It was found that the targetcompounds were soluble in water and could be potential candidates as water-soluble fluorescent dyes for the desired applications.