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1.D.184.  Ion-selective Crown-ether Crystal Pore (IS-CE-P) Family

Artificial solid-state ionic devices enable separation technologies. Ye et al. 2021 reported an artificial sodium-selective ionic device, built on synthesized porous crown-ether crystals which consist of densely packed 0.26-nm-wide pores. The Na+ selectivity of the artificial sodium-selective ionic device reached 15 against K +, which is comparable to the biological counterpart, 523 against Ca2 + , which is nearly two orders of magnitude higher than the biological one, and 1128 against Mg2 + . The selectivity may arise from the size effect and molecular recognition effect. 

References associated with 1.D.184 family:

Ye, T., G. Hou, W. Li, C. Wang, K. Yi, N. Liu, J. Liu, S. Huang, and J. Gao. (2021). Artificial sodium-selective ionic device based on crown-ether crystals with subnanometer pores. Nat Commun 12: 5231. 34471132