Subcomponent Exchange Transforms an Fe^II₄L₄ Cage from High- to Low-Spin, Switching Guest Release in a Two-Cage System.

ABSTRACT: Subcomponent exchange transformed new high-spin Fe^II₄L₄ cage 1 into previously-reported low-spin Fe^II₄L₄ cage 2: 2-formyl-6-methylpyridine was ejected in favor of the less sterically hindered 2-formylpyridine, with concomitant high- to low-spin transition of the cage's Fe^II centers. High-spin 1 also reacted more readily with electron-rich anilines than 2, enabling the design of a system consisting of two cages that could release their guests in response to combinations of different stimuli. The addition of p-anisidine to a mixture of high-spin 1 and previously-reported low-spin Fe^II₄L₆ cage 3 resulted in the destruction of 1 and the release of its guest. However, initial addition o

SUBMITTER: McConnell AJ 

PROVIDER: S-EPMC5537689 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature