Volume 63, Issue 1 e202310147
Minireview

Spin Frustration in Organic Radicals

Dr. Shuxuan Tang

Dr. Shuxuan Tang

Sinopec (Beijing) Research Institute of Chemical Industry Co., Ltd., Sinopec Beijing Research Institute of Chemical Industry, Beijing, 100013 P. R. China

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Prof. Dr. Xinping Wang

Corresponding Author

Prof. Dr. Xinping Wang

State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, Shanghai, 200032 P. R. China

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Dedicated to Prof. Jack Passmore
First published: 28 September 2023
Citations: 16

Graphical Abstract

Spin frustration has drawn people's attention for its significance in physics and materials science, especially for quantum spin liquids. Organic radical species show a promising potential in building spin-frustrated compounds. This Minireview briefly introduces the reported examples of organic radicals that possess spin frustration and summarizes their related data on frustration properties.

Abstract

Spin frustration, which results from geometric frustration and a systematical inability to satisfy all antiferromagnetic (AF) interactions between unpaired spins simultaneously, is under the spotlight for its importance in physics and materials science. Spin frustration is treated as the structural basis of quantum spin liquids (QSLs). Featuring flexible chemical structures, organic radical species exhibit great potential in building spin-frustrated molecules and lattices. So far, the reported examples of spin-frustrated organic radical compounds include triradicals, tetrathiafulvalene (TTF) radicals and derivatives, [Pd(dmit)2] compounds (dmit=1,3-dithiol-2-thione-4,5-dithiolate), nitronyl nitroxides, fullerenes, polycyclic aromatic hydrocarbons (PAHs), and other heterocyclic compounds where the spin frustration is generated intra- or intermolecularly. In this Minireview, we provide a brief summary of the reported radical compounds that possess spin frustration. The related data, including magnetic exchange coupling parameters, spin models, frustration parameters, and crystal lattices, are summarized and discussed.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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