Solid-solution (alloying) strategies in crystalline molecular conductors

Fourmigué, Marc

doi:10.1039/d1tc02160e

Cited by 14 publications

(19 citation statements)

References 141 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, molecule substitution would induce drastic changes in the crystal structure and destroy the intrinsic electronic state. To overcome this issue, chemical carrier doping by changing the valence of a counter ion has been performed in the study of molecular conductors [12] . However, to date, there are no available reports on the insulator–metal transition induced by the chemical carrier doping of molecular Mott insulators.…”

Section: Figurementioning

confidence: 99%

“…To overcome this issue, chemical carrier doping by changing the valence of a counter ion has been performed in the study of molecular conductors. [12] However, to date, there are no available reports on the insulator-metal transition induced by the chemical carrier doping of molecular Mott insulators. Recently, Yamamoto et al successfully conducted the carrier doping of a molecular Mott insulator by electric field application and observed the occurrence of the insulator-metal transition.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reversible Insulator–Metal Transition by Chemical Doping and Dedoping of a Mott Insulator

et al. 2022

View full text Add to dashboard Cite

The chemical carrier doping of molecular Mott insulators has been poorly investigated to date due to its difficulty. In this study, iodine doping of a molecular Mott insulator, lithium phthalocyanine crystallized in the x‐form (x‐LiPc), was performed to obtain metallic x‐LiPcI. Crystal structure analysis revealed that iodine atoms penetrated channels of x‐LiPc and formed one‐dimensional chains. The Raman spectroscopy of x‐LiPcI indicated the existence of linear I5−, demonstrating a transition from a half‐filled band of the Mott insulating state to a 2/5‐filled band of the metallic state. Electrical resistivity measurements confirmed the metallic nature of x‐LiPcI, whereas a thermally activated behavior was observed for pristine x‐LiPc. Furthermore, the x‐LiPc Mott insulator was reproduced by dedoping iodine from x‐LiPcI, suggesting that the electronic state can be reversibly tuned between the Mott insulating and metallic states by chemical doping and dedoping.

show abstract

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reversible Insulator–Metal Transition by Chemical Doping and Dedoping of a Mott Insulator

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Current understanding of principles governing the mixed crystallization of organic and inorganic compounds is based largely on work carried out decades ago by Kitaigorodsky and co-workers, which has not been subjected to extensive reexamination. , These pioneering studies suggested that a series of mixed crystals with continuously variable compositions in all proportions can only be obtained when the components are similar enough to crystallize isostructurally . However, more recent work has challenged this notion and shown that mixed crystals with a wide range of compositions can be formed from pairs that are not known to have a close crystallographic relationship. − These recent advances, which include the discovery that mixed crystals can be effective seeds for inducing crystallization of the individual components, have made mixed crystallization an exciting area of research.…”

Section: Introductionmentioning

confidence: 99%

Seeking Rules Governing Mixed Molecular Crystallization

Villeneuve

Dickman

Maris

et al. 2022

Crystal Growth & Design

View full text Add to dashboard Cite

Mixed crystals result when components of the structure are randomly replaced by analogues in ratios that can be varied continuously over certain ranges. Mixed crystals are useful because their properties can be adjusted by increments, simply by altering the ratio of components. Unfortunately, no clear rules exist to predict when two compounds are similar enough to form mixed crystals containing substantial amounts of both. To gain further understanding, we have used single-crystal X-ray diffraction, computational methods, and other tools to study mixed crystallizations within a selected set of structurally related compounds. This work has allowed us to begin to clarify the rules governing the phenomenon by showing that mixed crystals can have compositions and properties that vary continuously over wide ranges, even when the individual components do not normally crystallize in the same way. Moreover, close agreement of the results of our experiments and computational modeling demonstrates that reliable predictions about mixed crystallization can be made, despite the complexity of the phenomenon.

show abstract

“…Solid solutions of inorganic compounds have been rather extensively studied, including their varying composition effect on luminescence properties. − For purely organic systems, the solid solution phenomenon has been explored not nearly as much. There are a small number of cases reported, where properties of molecular solid solutions have been studied related to semiconductor applications. , The limited number of studies is mostly because the formation of molecular solid solutions is not so straightforward, and it is governed by complex molecular recognition processes in the solid state . In atomic lattices, it is relatively easy to exchange similar atomic species that eventually leads to alloys.…”

Section: Introductionmentioning

confidence: 99%

“…There are a small number of cases reported, where properties of molecular solid solutions have been studied related to semiconductor applications. 29,30 The limited number of studies is mostly because the formation of molecular solid solutions is not so straightforward, 31 and it is governed by complex molecular recognition processes in the solid state. 32 In atomic lattices, it is relatively easy to exchange similar atomic species that eventually leads to alloys.…”

Section: Introductionmentioning

confidence: 99%

Fine-Tuning Solid State Luminescence Properties of Organic Crystals via Solid Solution Formation: The Example of 4-Iodothioxanthone–4-Chlorothioxanthone System

Saršu̅ns

Ķemere

Karziņins

et al. 2022

Crystal Growth & Design

View full text Add to dashboard Cite

Solid solutions with fine-tunable photoluminescence have been obtained in a 4-iodothioxanthone−4-chlorothioxanthone system. Both pure components are room-temperature luminophors demonstrating different luminescence properties. It was discovered that in the 4-chlorothioxanthone structure, up to half of the molecules can be replaced by the iodo analogue obtaining solid solutions in the respective composition range. Despite this solid solution existing in such a large composition range, the variation of the luminescence spectra is not substantial. In the 4-iodothioxanthone structure, only up to ∼20% of the molecules can be replaced by the chloro analogue before the composition limit of this solid solution is reached. In contrast, there is a strong composition-dependent response of the luminescence. A considerable change in luminescence spectra is observed even if only a few mol % of the opposite component is added. The spectra of mechanical mixtures of pure components are different from those of the solid solutions, which demonstrates the unique behavior of the newly obtained solid phases. This study shows great potential to use solid solution engineering in the organic solid state to tune material properties in a continuum as opposed to other crystal engineering approaches, leading to property tunability in a stepwise fashion.

show abstract

Solid-solution (alloying) strategies in crystalline molecular conductors

Abstract: In this review, we describe solid solutions strategies employed in molecular conductors, where the control of the transport and magnetic properties (metallic or superconducting behavior, metal-insulator transitions, etc) is the...

Cited by 14 publications

References 141 publications

Reversible Insulator–Metal Transition by Chemical Doping and Dedoping of a Mott Insulator

Reversible Insulator–Metal Transition by Chemical Doping and Dedoping of a Mott Insulator

Seeking Rules Governing Mixed Molecular Crystallization

Fine-Tuning Solid State Luminescence Properties of Organic Crystals via Solid Solution Formation: The Example of 4-Iodothioxanthone–4-Chlorothioxanthone System

Contact Info

Product

Resources

About