Stepwise Assembly of Quinary Multivariate Metal−Organic Frameworks via Diversified Linker Exchange and Installation

Authors

Yuchen Hu, University of Nebraska-Lincoln
Xin Zhang, University of Nebraska-Lincoln, Beijing University of Technology
Rebecca Shu Hui Khoo, Lawrence Berkeley National Laboratory
Christian Fiankor, University of Nebraska-Lincoln
Xu Zhang, Huaiyin Normal University
Jian Zhang, University of Nebraska-Lincoln, Lawrence Berkeley National LaboratoryFollow

Date of this Version

6-15-2023

Citation

J. Am. Chem. Soc. 2023, 145, 13929−13937

Comments

Used by permission.

Abstract

Multivariate MOFs (MTV-MOFs) constructed from multiple components with atomistic precision hold the promise for many fascinating developments in both fundamental sciences and applications. Sequential linker installation can be an effective method to introduce different functional linkers into an MOF that contains coordinatively unsaturated metal sites. However, in many cases, these linkers must be installed according to a specific sequence and the complete synthetic flexibility and freedom is yet to be realized. Here, we rationally decreased the size of the primary ligand used in NPF-300, a Zr-MOF with scu topology (NPF = Nebraska Porous Framework), and synthesized its isostructure, NPF-320. NPF-320 exhibits optimized pocket sizes which allow for the post-synthetic installation of three secondary linkers in all six permuted sequences via both linker exchange and installation, forming a final quinary MTV-MOF via single-crystal-to-single-crystal transformation. With the functionalization of the linkers from the quinary MOF system, one will be able to construct MTV-MOFs not only with variable porosity but also with unprecedented complexity and encoded synthetic sequence information. The utility of sequential linker installation was further demonstrated by the construction of a donor−acceptor pair-based energy transfer system.