LAUSR

Abstract Single crystals of non-peripherally alkyl-substituted macrocycle molecules, such as octahexylphthalocyanine (C6PcH 2 ), octapentylphthalocyanine (C5PcH 2 ), octahexyltetrabenzotriazaporphyrin (C6TBTAPH 2 ), and their blends were prepared. The crystal structures of C6PcH 2 and C5PcH 2 , which were determined by single-crystal X-ray structure analysis, were identified as monoclinic lattices, while that of C6TBTAPH 2 was identified as a triclinic lattice. Despite the similarity between the crystal structures of C6PcH 2 and C5PcH 2 , the single crystals grown from the blended solutions of C6PcH 2 and C5PcH 2 were based on a triclinic lattice. On the other hand, in the case of the single crystals composed of C6PcH 2 and C6TBTAPH 2 , another type of crystal structure did not appear. The crystal structures of these single crystals are discussed by taking the differences in the alkyl-substituent length and the core structure into consideration.