IR‐Spektren einiger Perrhenate

Synthesis and Morphology of AgReO4 Plates, Rods, and Stars

“…FT‐IR spectra of the as‐prepared AgReO 4 stars indicate the strongest absorptions at 910 and 868 cm –1 , which can be again attributed to the asymmetrical stretching of the [ReO 4 ] – tetrahedron (Figure b). In addition, weak overtones and intermodulational vibrations at 1867 and 1803 cm –1 are observed . Further weak adsorptions at 2962, 2877, 1272, 1031, and 638 cm –1 relate to [NMe 4 ][OTf] (Figure b).…”

“…Here, the strongest absorptions at 910 and 868 cm –1 can be attributed to stretching vibrations of the [ReO 4 ] – unit. These vibrations are accompanied by weak overtone and intermodulational absorptions at 1867 and 1803 cm –1 . Furthermore, weak vibrations at 2962, 2877, 1272, 1031, and 638 cm –1 indicate the presence of [NBu 4 ][OTf] remaining on the particle surface.…”