Oxabicyclic Guest Compounds as sII Promoters: Spectroscopic Investigation and Equilibrium Measurements.

ABSTRACT: In this study, we investigate three oxabicyclic compounds, 3,6-dioxabicyclo[3. 1.0]hexane (C₄H₆O₂, ETHF), 7-oxabicyclo[2.2.1]heptane (C₆H₁₀O, 14ECH), and 7-oxabicyclo[4.1.0]heptane (C₆H₁₀O, 12ECH) as novel promoters for gas hydrates. According to the outcomes of powder X-ray diffraction (PXRD) and synchrotron high-resolution powder diffraction (HRPD), all CH₄ hydrates formed with ETHF, 14ECH, and 12ECH were identified to be sII (Fd-3m) hydrates with corresponding lattice parameters of 17.195, 17.330, and 17.382 Å, respectively. It was also clearly demonstrated that CH₄ molecules are accommodated in the sII-S cages through solid-state ¹³C NMR and Raman spectra. Consequently, we clar

SUBMITTER: Seol J 

PROVIDER: S-EPMC7396542 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature