“…ZIF-8) and mixed matrix membranes [49][50][51]. There is considerable evidence in the literature to indicate that hydrogen bonding, and consequent cluster formation manifests in LTA-4A [52,53], MFI [54][55][56][57][58][59][60][61][62][63][64], ZIF-8 [65], Nafion [66], PDMS [67], NaX [68][69][70][71][72], and Chitosan [73].…”