High-pressure circular dichroism spectroscopy up to 400 MPa using polycrystalline yttrium aluminum garnet (YAG) as pressure-resistant optical windows

Abstract

Circular dichroism (CD) spectroscopy at high pressure (≤400 MPa) was accomplished by using polycrystalline yttrium aluminum garnet (Y₃Al₅O₁₂, YAG) as pressure-resistant optical windows. Conformational changes, including main-chain helix inversions of poly(quinoxaline-2,3-diyl)s (PQXs), in organic solvents at high hydrostatic pressure (>200 MPa) using a newly developed high-pressure CD cell with polycrystalline YAG windows were demonstrated.