Catch it if you can! Redox‐active resorcin[4]arenecavitands with quinone walls can be reversibly reduced to the hydroquinone form, influencing their host–guest complexation strength. Specifically, a top‐covered triptycenequinone cavitand forms kinetically stable complexes with cycloalkanes; this complexation is weaker in the reduced hydroquinone form.
Diquinone-based resorcin[4]arenecavitands that open to a kite and close to a vase form upon changing their redox state, thereby releasing and binding guests, have been prepared and studied. The switching mechanism is based on intramolecular H-bonding interactions that stabilize the vase form and are only present in the reduced hydroquinone state. The intramolecular H-bonds were characterized using
已经制备和研究了基于二醌的间苯二酚 [4] 芳烃空腔化合物,它们在改变氧化还原状态时向风筝开放并接近花瓶形式,从而释放和结合客体。转换机制基于稳定花瓶形式且仅以还原氢醌状态存在的分子内氢键相互作用。使用 X 射线、IR 和 NMR 光谱表征分子内 H 键。客人在封闭的还原状态下被束缚,在开放的氧化状态下完全释放。