Research demonstrates chiroptical switching in flexible heterohelicenes, suggesting new applications in materials science.
“π-Expanded” (hetero)helicenes attracted special attention by virtue of their increased helical diameter, enlarged cavity, structural flexibility, and dynamics. However, their structural flexibility results in low enantiomerization barriers (ΔGe‡ <20 kcal·mol−1),...
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Pal et al. (2026) studied this question.
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