Solid-State Supramolecular Chirogenesis: High Optical Activity and Gradual Development of Zinc Octaethylporphyrin Aggregates



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Slow formation of J-type helical aggregates occurs when the simple achiral zinc octaethylporphyrin interacts with enantiopure 1-cyclohexylethylamines in the solid state. These chiral solid-state aggregates exhibit a high degree of optical activity and are remarkably stable, as evidenced in the circular dichroism spectra (see picture).