Mesostructured Selenides with Cubic MCM-48 Type Symmetry: Large Framework Elasticity and Uncommon Resiliency to Strong Acids

The metal mesostructured Pt/Sn/Se chalcogenides with cubic MCM-48 type pore symmetry are found to be surprisingly stable in concentrated oxidizing acids. Their metal chalcogenide framework exhibits high flexibility during reversible proton exchange as it expands and contracts in an apparent breathing-like action.