Selective Bicarbonate Receptors for Direct Ocean Capture of CO₂.

ABSTRACT: Given the alkalinity of the oceans (pH ≈ 8), carbon dioxide exists in surface oceanwater primarily as bicarbonate (HCO₃ ^-) at relatively high concentrations (2.4 mM) but in the presence of many other anions, some of which are in considerable excess, notably chloride and sulfate. Supramolecular receptors for bicarbonate with appropriate affinity and high selectivity over competing ions would enable the development of novel energy-efficient technologies for direct ocean capture (DOC) of carbon dioxide such as facilitated-transport membranes. We report the first lanthanide-based receptors for HCO₃ ^- with uniquely high selectivity and affinity matching oceanic conditions as needed for the development of DOC technologies. Further studies elucidate how

SUBMITTER: Martinon TLM 

PROVIDER: S-EPMC12648323 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature