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

The trimethylsilyl-protected phosphinimines (9-anthracenyl)P2(h) P=NSiMe3 and (l-naphthyl)Ph2P=NSiMe3 and the ion pairs [(9-antracenyl)Ph2P=NH2+][MO4-] and [(1-naphthyl_Ph2P=NH2+][MO4] with M = Re or Tc were synthesized and characterized by H-1 and P-31 NMR, UV-Vis and fluorescence spectroscopy, elemental analysis, and/or single crystal X-ray diffraction. Radiocliemical Studies performed using Tc-99m and Re-186 as the tracers for Tc-99 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)P2(h)P=NH2+] [ReO4-] (H21C26NO4PRe) 2, monoclinic (P2(1)/n), a= 11.3047(54 angstrom, b= 16.3983(8) angstrom, = 12.2469(6) angstrom, =92.344(1)degrees, Z =4; [(9-anthracenyl)Ph2P=NH2+[TcO4-] (H21C26NO4PTc) 3, monoclinic (P2(1)/n), a = 11.3619(4) angstrom, b = 12.2203(3) angstrom c = 25.7794(13) angstrom, beta= 92.162(1)degrees, Z = 4.