Crystal engineering on superpolyhedral building blocks in metal-organic frameworks applied in gas adsorption. uri icon

abstract

  • Two metal-organic frameworks [PCN-426(Ni) and PCN-427(Cu)] have been designed and synthesized to investigate the structure predictability using a SBB (supermolecular building blocks) approach. Tetratopic ligands featuring 120 angular carboxylate moieties were coordinated with a [Ni3(3-O)] cluster and a [Cu2O2] unit, respectively. As topologically predicted, 4-connected networks with square coordination adopted the nbo net for the Ni-MOF and ssb net for the Cu-MOF. PCN-426(Ni) was augmented with 12-connected octahedral SBBs, while PCN-427(Cu) was constructed with tetragonal open channels. After a CO2 supercritical drying procedure, the PCN-426(Ni) possessed a Brunauer-Emmett-Teller (BET) surface area as high as 3935 m(2) g(-1) and impressively high N2 uptake of 1500 cm(3) g(-1). This work demonstrates the generalization of the SBB strategy, finding an alternative to inconvenient synthetic processes to achieve the desired structural features.

published proceedings

  • Acta Crystallogr B Struct Sci Cryst Eng Mater

altmetric score

  • 0.75

author list (cited authors)

  • Chen, Y. P., Liu, T. F., Fordham, S., & Zhou, H. C.

citation count

  • 10

complete list of authors

  • Chen, Ying Pin||Liu, Tian Fu||Fordham, Stephen||Zhou, Hong Cai

publication date

  • December 2015