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Control of Conformation and Chirality of Nonplanar π‐Conjugated Diporphyrins Using Substituents and Axial Ligands |
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| Authors: | Satoru Ito Prof?Dr Satoru Hiroto Prof?Dr Naoki Ousaka Prof?Dr Eiji Yashima Prof?Dr Hiroshi Shinokubo |
| Affiliation: | 1. Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan;2. Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, Japan |
| Abstract: | Nonplanar conformations of pyrazine‐fused ZnII diporphyrins could be controlled by the choice of the meso‐aryl substituents and an axial ligand on the central metals. ZnII diporphyrins bearing sterically demanding meso‐aryl groups with ortho‐substituents led to a twisted chiral D2 conformation, while an achiral C2h form was preferred in the case of aryl groups without ortho‐substituents. Helical chirality induction on ZnII diporphyrins in the twisted conformation was achieved by controlling their handedness of the molecular twist through coordination of optically active 1‐phenethylamine. |
| Keywords: | chirality circular dichroism conformation helicity porphyrin |
