Fluorescent phosphinimine as possible precursor to an anionic and fluorescent sensor for Tc-99

Abstract

AbstractThe trimethylsilyl-protected phosphinimines (9-anthracenyl)Ph2P=NSiMe3and (1-naphthyl)Ph2P=NSiMe3and the ion pairs [(9-anthracenyl)Ph2P=NH2+][MO4−] and [(1-naphthyl)Ph2P=NH2+][MO4−] with M=Re or Tc were synthesized and characterized by1H and31P NMR, UV-Vis and fluorescence spectroscopy, elemental analysis, and/or single crystal X-ray diffraction. Radiochemical studies performed using99mTc and186Re as the tracers for99Tc and Re found the selectivity of the phosphiniminium cations for pertechnetate in the presence of a variety of anions found in the environment to be excellent. The crystallographic data reported for the structures are as follows: [(9-anthracenyl)Ph2P=NH2+][ReO4−] (H21C26NO4PRe)2, monoclinic (P21/n),a=11.3047(5) Å,b=16.3983(8) Å,c=12.2469(6) Å, β=92.344(1)°,Z=4; [(9-anthracenyl)Ph2P=NH2+][TcO4−] (H21C26NO4PTc)3, monoclinic (P21/n),a=11.3619(4) Å,b=12.2203(3) Å,c=25.7794(13) Å,β=92.162(1)°,Z=4.