Paramagnetic Organocobalt Capsule Revealing Xenon Host-Guest Chemistry.

ABSTRACT: We investigated Xe binding in a previously reported paramagnetic metal-organic tetrahedral capsule, [Co₄L₆]^4-, where L^2- = 4,4'-bis[(2-pyridinylmethylene)amino][1,1'-biphenyl]-2,2'-disulfonate. The Xe-inclusion complex, [XeCo₄L₆]^4-, was confirmed by ¹H NMR spectroscopy to be the dominant species in aqueous solution saturated with Xe gas. The measured Xe dissociation rate in [XeCo₄L₆]^4-, k_off = 4.45(5) × 10² s^-1, was at least 40 times greater than that in the analogous [XeFe₄L₆]^4- complex, highlighting the capability of metal-ligand interactions to tune the capsule size and guest permeability. The ra

SUBMITTER: Du K 

PROVIDER: S-EPMC7672707 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature