The electrochemical properties of water-insoluble Fe-tetraphenylporphyrins and Fe-phthalocyanines encapsulated in molecular capsules were investigated in acidic and alkaline solutions. These compounds in the molecular capsules accelerated the O2 reduction reaction. indicating that O2 molecules can easily pass through the gaps in the capsule. Further. https://toyscyclers.shop/product-category/backpacks/