Exposed Equatorial Positions of Metal Centers via Sequential Ligand Elimination and Installation in MOFs. Academic Article uri icon


  • Metal-organic frameworks (MOFs) provide highly designable platforms to construct complex coordination architectures for targeted applications. Herein, we demonstrate that trans-coordinated metal centers with exposed equatorial positions can be placed in a MOF matrix. A Zr-based MOF, namely, PCN-160, was initially synthesized as a scaffold structure. Postsynthetic linker labilization was subsequently implemented to partially remove the original dicarboxylate linkers and incorporate pyridinecarboxylates. A pair of neighboring pyridyl groups was arranged at proper proximity within the framework to form trans-binding sites that accommodate different metal cations including Mn2+, Fe2+, Co2+, Ni2+, Cu2+, and Pd2+. Furthermore, the trans-coordinated Ni2+ sites in porous frameworks can be readily accessed by substrates along the equatorial plane, facilitating the catalysis as manifested by the superior activity in ethylene dimerization over that observed for a cis-chelated catalyst.

published proceedings

  • J Am Chem Soc

altmetric score

  • 5.9

author list (cited authors)

  • Yuan, S., Zhang, P., Zhang, L., Garcia-Esparza, A. T., Sokaras, D., Qin, J., ... Zhou, H.

citation count

  • 49

complete list of authors

  • Yuan, Shuai||Zhang, Peng||Zhang, Liangliang||Garcia-Esparza, Angel T||Sokaras, Dimosthenis||Qin, Jun-Sheng||Feng, Liang||Day, Gregory S||Chen, Wenmiao||Drake, Hannah F||Elumalai, Palani||Madrahimov, Sherzod T||Sun, Daofeng||Zhou, Hong-Cai

publication date

  • August 2018