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Isoreticular Linker Substitution in Conductive Metal–Organic Frameworks with Through-Space Transport Pathways

preprint
submitted on 31.03.2020 and posted on 01.04.2020 by Lilia S. Xie, Sarah S. Park, Michał J. Chmielewski, Hanyu Liu, Ruby A. Kharod, Luming Yang, Michael G. Campbell, Mircea Dinca

The extension of reticular chemistry concepts to electrically conductive three-dimensional metal-organic frameworks (MOFs) has been challenging, particularly for cases in which strong interactions between electroactive linkers create the charge transport pathways. Here, we report the successful replacement of tetrathiafulvalene (TTF) with a nickel glyoximate core in a family of isostructural conductive MOFs with Mn2+, Zn2+, and Cd2+. Different coordination environments of the framework metals lead to variations in the linker stacking geometries and optical properties. Single crystal conductivity data are consistent with charge transport along the linker stacking direction, with conductivity values only slightly lower than those reported for the analogous TTF materials. These results serve as a case study demonstrating how reticular chemistry design principles can be extended to conductive frameworks with significant intermolecular contacts.

Funding

Fundamental studies of thermal and electrical transport in microporous metal-organic frameworks

Basic Energy Sciences

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History

Email Address of Submitting Author

liliaxie@mit.edu

Institution

Massachusetts Institute of Technology

Country

United States of America

ORCID For Submitting Author

0000-0001-5249-4952

Declaration of Conflict of Interest

No conflict of interest

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