Two-dimensional nanosheets of metal-organic frameworks with tailorable morphologies

The controlled preparation of two-dimensional (2D) nanosheets of metal-organic frameworks (MOFs), with tailorable methodologies, properties, and applications, is of significant importance. Here, in this work, by subtle control of the ultrasonic duration and solvent polarity, the iron(II)-based 2D MOF Fe(pyz)(2)Cl-2 (pyz = pyrazine) has been elegantly tailored into 2D nanosheets (lateral size >= 500 nm in aqueous, with ultrasonic duration of 30 min) and one-dimensional (1D) nanoribbons (lateral size <100 nm in ethanol solution, with ultrasonic duration of 90 min). The aqueous suspension of 2D nanosheets was featured with thermal-induced spin-state transition at around room temperature and can be used as effective Fenton catalysts for degradation of water-soluble organic dyes, whereas the ethanol suspension of 1D nanoribbons can act as a versatile nanoplatform for trans-to -cis isomerization of 4, 40-azopyridine. These results may provide a novel strategy for the controlled preparation of layered nanomaterials. (C) 2021 Published by Elsevier Ltd.

Automated summary

By controlling the ultrasonic duration and solvent polarity, iron(II)-based 2D MOF was tailored into 2D nanosheets and 1D nanoribbons, exhibiting different properties and applications in different solutions. These results provide a novel strategy for the controlled preparation of layered nanomaterials.