Synthesis, Crystal Structure and Spectroscopy of 3,4-Perylene-dicarboxylic Monoanhydride

Abstract

Abstract The preparation, via a chemical vapor deposition process, of metallic-green whiskers of 3,4-perylenedicarboxylic monoanhydride (PDCMA), is described. The crystal structure and the electronic, infrared and resonance-enhanced Raman spectra of the PDCMA crystals are reported and compared with the corresponding data for the dianhydride, PTCDA. Interesting differences in the spectroscopy of PDCMA compared with that of PTCDA have been found. This has been correlated with the somewhat increased charge delocalization in PDCMA caused by the packing of the molecules in the crystal. The application of some of these results in characterizing the partly solid state, heat-induced polymerization of PTCDA to the intrinsically conducting polymer, polyperinaphthalene, is also pointed out.