APPLICATION OF FOURIER-TRANSFORM INFRARED PHOTOACOUSTIC-SPECTROSCOPY TO PORPHYRINS STUDIES .3. FTIR-PAS OF LANTHANIDE ACETYLACETONATE-MESO-TETRA-(PARA-CHLOROPHENYL) PORPHYRIN RARE-EARTH COMPLEXES

The fourrier transform infrared photoacoustic spectra of tetra-(para-chlorophenyl) porphyrin and its coordination compounds LnT(p-Cl)PPacac (Ln: Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Lu) in the range of 3600-220 cm(-1) were measured and investigated. Because of the coordination bonding between the rare earth ion and nitrogen in LnT (p-Cl)PPacac forms, the band near 400 cm(-1) and M-O stretching vibration on the acetylacetonate ring become weaker, and shifted to the lower wavenumber. Metal sensitive bands were found at about 1558, 1474, 1427, 1219, 798, 733 and 250 cm(-1).