Control of Conformation and Chirality of Nonplanar π-Conjugated Diporphyrins Using Substituents and Axial Ligands

July 28, 2017

Title

Control of Conformation and Chirality of Nonplanar π-Conjugated Diporphyrins Using Substituents and Axial Ligands

Author

Satoru Ito, Satoru Hiroto, Naoki Ousaka, Eiji Yashima, Hiroshi Shinokubo

Year

2016

Journal

Chemistry An Asian Journal

Abstract

Nonplanar conformations of pyrazine-fused ZnII diporphyrins could be controlled by the choice of themeso-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.

Instrument

J-820

Keywords

Circular dichroism, Ligand binding, Inorganic chemistry