Nickel porphyrin nanotweezersElectronic supplementary information (ESI) available: spectroscopic data for 3–6. See http://www.rsc.org/suppdata/cc/b1/b104715a/
Abstract
A strapped chiroporphyrin free base with two 8-methylene chains linking two adjacent meso-substituents was synthesized as the α4 conformer; insertion of Ni(II) triggered a complete conversion to the αβαβ complex, and demetallation totally regenerated the strapped free base in the α4 conformation.