First X-ray crystallographic study of a meso-substituted tetrabenzotriazaporphyrin: Structural effect of a meso-aryl unit on 27-(2-methylphenyl)tetrabenzotriazaporphyrinato zinc example in comparison with zinc phthalocyaninate
摘要:
A recently developed synthetic procedure afforded meso-aryl substituted tetrabenzotriazaporphyrin complex, namely 27-(2-methylphenyptetrabenzo[b,g,Lq][5,10,15]triazaporphyrinato zinc ((2-MePh)TBTAPZn, 1). The reaction also produced zinc phthalocyanine (PcZn, 2) as a byproduct. The complexes were characterized by the UV-Vis, NMR spectroscopy as well as MALDI-TOF mass spectrometry. Furthermore, they form supramolecular structures [1 center dot DMSO]center dot 2(DMSO) (I) and [2 center dot DMSO] 0.65(DMSO)center dot 0.5(CH3OH) (II) determined by single-crystal X-ray diffraction analysis. To the best of our knowledge, I represents the first X-ray defined structure of a mesa-substituted TBTAP derivative. Both structures were shown to be composed of centrosymmetric dimers, which are stabilized by the axial it-stacking intermolecular interactions. Comparison of the data for I and II indicates that the presence of the meso-aryl substituent in the TBTAP molecule results in considerable and even unexpected structural effects. (C) 2014 Elsevier Ltd. All rights reserved.