Abstract

AbstractControlling the transport of thermal energy is key to most applications of metal–organic frameworks (MOFs). Analyzing the evolution of the effective local temperature, the interfaces between the metal nodes and the organic linkers are identified as the primary bottlenecks for heat conduction. Consequently, changing the bonding strength at that node–linker interface and the mass of the metal atoms can be exploited to tune the thermal conductivity. This insight is generated employing molecular dynamics simulations in conjunction with advanced, ab initio parameterized force fields. The focus of the present study is on MOF‐5 as a prototypical example of an isoreticular MOF. However, the key findings prevail for different node structures and node–linker bonding chemistries. The presented results lay the foundation for developing detailed structure‐to‐property relationships for thermal transport in MOFs with the goal of devising strategies for the application‐specific optimization of heat conduction.

Highlights

  • Analyzing the evolution of the effective local temperature, the interfaces between the metal nodes and the organic linkers are identified as the primary bottlenecks for heat conduction

  • The presented results lay the foundation for developing detailed structure-to-property relationships for thermal transport in Metal-Organic Framework (MOF) with the goal of devising strategies for the application-specific optimization of heat conduction

  • The structure of a Metal-Organic Framework (MOF) is characterized by an open framework of metal ions interconnected by organic linkers

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Summary

Introduction

Analyzing the evolution of the effective local temperature, the interfaces between the metal nodes and the organic linkers are identified as the primary bottlenecks for heat conduction. Changing the bonding strength at that node-linker interface and the mass of the metal atoms can be exploited to tune the thermal conductivity.

Results
Conclusion

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