Complete twin suppression in oriented NH 2 -MIL-125 film via facile coordination modulation.

Complete suppression of twin crystal formation in oriented metal-organic framework (MOF) film remains a great challenge. In this study, we successfully avoided the twin generation in c -oriented NH 2 -MIL-125 film through simple competitive metal ion-based coordination modulation. Simultaneously, relevant mechanism associated with twin suppression was elucidated.