Sub-Nano Confined Matter at High Pressures

I will first present a review on several novel compounds with potential technological applications, obtained by reacting dense simple carbon bearing molecular systems at GPa or tens of GPa, strong-ly confined in the sub-nanopores of zeolites. On a more physical ground, confining inhert simple systems at high pressures, at the Angstrom scale, produced exotic sub-nanophases of these systems. Indeed, I will show recently obtained dense sub-nanophases of rare gases and of N2, O2, H2 and H2O, confined in zeolites. Investigations were performed by using diamond anvil cells, optical spectroscopy, and laboratory and synchrotron X-ray diffraction, and also classical and DFT simulations.