Spin in Organic Cocrystals

Abstract

Organic spintronics has caused a huge revolution in creating highly efficient low‐power circuits. Spin manipulation in organic cocrystals has become a promising strategy to uncover more chemicophysical properties for diverse applications. In this Minireview, we summarize the recent advancements of spin properties in organic charge‐transfer cocrystals, and briefly describe the possible mechanisms behind them. Beside the known spin properties (spin multiplicity, mechanoresponsive spin, chiral orbit and spin‐crossover) in binary/ternary cocrystals, other spin phenomena in radical cocrystals and spin transport are also summarized and discussed. Hopefully, deep understanding of current achievements, challenges and perspectives will offer the clear direction for the introduction of spin in organic cocrystals.

Influence of Internal Molecular Motions in the Photothermal Conversion Effect of Charge-Transfer Cocrystals

“…Figure b depicts the ESR spectra of CP-TCNQ which shows an isotropic, centered-field signal with a g value of 2.0035, attributed to the presence of the expected unpaired electrons . For the case of CP-TFBQ , it displays a low-intensity, rhombic-type, centered signal with g values of g x = 2.0027, g Y = 2.0065, and g Z = 2.0079; however, the resolution of the signal does not provide any more information about the coupling of the radical . Variable-temperature ESR experiments were performed for both cocrystals, as depicted in Figure S16.…”

Organic iontronic memristors for artificial synapses and bionic neuromorphic computing

“…to enable information processing, recognition, memorizing and forgetting, learning, and decision-making. 37–45…”

Magnetic Bistability in an Organic Radical-Based Charge Transfer Cocrystal

“…Organic charge transfer cocrystals (CTCs) have long been known as a class of promising magnetoelectric materials that have rich spins of unpaired electrons generated from charge transfer interactions between the orderly packed donor (D) and acceptor (A) molecules. − Owing to the cooperativity effect between D/A molecules, CTCs possess unique advantages over their single-component counterpart in terms of their higher feasibility of property tuning via either composition accommodation, stoichiometry regulation, polymorph controlling, or degree of charge transfer (DCT) management. − In this regard, we envisioned that CTCs might also serve as a class of ideal candidates for developing novel magnetic bistable materials, especially considering the huge amounts of existing examples in the CTCs’ material library as well as their excellent property tunability. Nevertheless, despite such promises, magnetic bistable materials that are based on all-organic CTC complexes have still been rarely reported, except only one recent demonstration in which a magnetic bistable salt of organic radical ions was reported …”