Quasi-one-dimensional antiferromagnetism in fluoro-aluminum phthalocyanine-(BF4)0.3

The crystal structure and magnetism of fluoro-aluminum phthalocyanine (AlPcF) doped with BF4 are studied. A powder x-ray-diffraction analysis indicates that the stoichiometry is AlPcF-(BF4)0.3 and that the unit cell is a tetragonal of a = 18.952 ± 0.023 Å and c = 3.613 ± 0.006 Å in which the AlPcF polymer axes run parallel to the c axis. The phthalocyanine rings have an interleaved structure, i.e. the rings in the nearest-neighbor chains have different c coordinates. The BF4− ions occupy their sites randomly with a probability of 0.3. A quasi-one-dimensional antiferromagnetism is observed in the AlPcF-(BF4)0.3, which is attributed to the interleaved structure and to the random distribution of the BF4− ions with a possible partial correlation.