Paramagnetic Shifts and Guest Exchange Kinetics in Co_nFe_4-n Metal-Organic Capsules.

ABSTRACT: We investigate the magnetic resonance properties and exchange kinetics of guest molecules in a series of hetero-bimetallic capsules, [Co_nFe_4-nL₆]^4- (n = 1-3), where L^2- = 4,4'-bis[(2-pyridinylmethylene)amino]-[1,1'-biphenyl]-2,2'-disulfonate. H bond networks between capsule sulfonates and guanidinium cations promote the crystallization of [Co_nFe_4-nL₆]^4-. The following four isostructural crystals are reported: two guest-free forms, (C(NH₂)₃)₄[Co_1.8Fe_2.2L₆]·69H₂O (1) and (C(NH₂)₃)₄[Co_2.7Fe_1.3L₆]·73H₂O

SUBMITTER: Du K 

PROVIDER: S-EPMC7649716 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature