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Synthesis of Triazole and Tetrazole-Functionalized Zr-Based Metal-Organic Frameworks Through Post-Synthetic Ligand Exchange

2.6K Views

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04:51 min

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June 23rd, 2023

DOI :

10.3791/65619-v

June 23rd, 2023

•

Sangho Lee*¹, Daeyeon Lee*¹, Jin Yeong Kim², Min Kim¹

¹Department of Chemistry, Chungbuk National University, ²Department of Chemistry Education, Seoul National University

Transcript

Our main research topic is functionalizing the porous metal-organic frameworks, MOFs, with interesting functional groups through various techniques. This study is focused on heterocycle installation in MOFs. PSE, post-synthetic ligand exchange is the main technique in this work.

The ligand with target functional group could be installed in presynthesized MOFS throughout the solid-solution exchange process. Especially, some of the unstable ligands and ligands with coordinating groups could be efficiently incorporated into MOFs through the PSE techniques. Both triazole and tetrazole functional groups have multiple coordinating nitrogen grooves.

Therefore, there is competition for coordination between metal carboxylate and metal triazolate or tetrazolate. The incorporation ratio of target ligands is easily controlled in the PSE process and multiple targets could be installed in a single MOF through this approach.

Summary

Post-synthetic ligand exchange (PSE) is a versatile and powerful tool for installing functional groups into metal-organic frameworks (MOFs). Exposing MOFs to solutions containing triazole- and tetrazole-functionalized ligands can incorporate these heterocyclic moieties into Zr-MOFs through PSE processes.

Explore More Videos

Metal organic Frameworks MOFs

Post synthetic Ligand Exchange PSE

Functionalization

Coordination Bonds

Solid solution Exchange

Heterocycle Installation

Characterization Techniques

Powder X ray Diffraction

Nuclear Magnetic Resonance Spectroscopy

Chapters in this video

0:00

Introduction

1:24

Setting up the Post‐synthetic Ligand Exchange (PSE) Process, Exchanged MOF Isolation and Washing Process

2:46

Characterization of the MOF by Powder X‐Ray Diffraction (PXRD) and Nuclear Magnetic Resonance (NMR) After Digestion

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