Luminescence and Single‐Molecule‐Magnet Behaviour in Lanthanide Coordination Complexes Involving Benzothiazole‐Based Tetrathiafulvalene Ligands

Kishi, Yosuke; Cornet, Louis; Pointillart, Fabrice; Riobé, François; Lefeuvre, Bertrand; Cador, Olivier; Guennic, Boris Le; Maury, Olivier; Fujiwara, Hideki; Ouahab, Lahcène

doi:10.1002/ejic.201700893

Cited by 16 publications

(13 citation statements)

References 74 publications

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“…SMMs based on these ions require a strong equatorial component of the ligand field to support axial magnetic anisotropy. Examples of Yb 3+ complexes that simultaneously possess magnetic properties and ligand‐sensitized luminescence have been reported in the past few years [113–117] . The energy barrier ( U eff ) that can be realized through a proper design of the system can reach values as high as 45 cm −1 ; [116] however, this also highlights the fact that some additional efforts will be required for them to compete with Tb 3+ ‐ and Dy + ‐based SMMs.…”

Section: Luminescent Smmsmentioning

confidence: 99%

Shining New Light on Multifunctional Lanthanide Single‐Molecule Magnets

2020

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Single‐molecule magnets (SMMs) are at the forefront of new technological advances in quantum information processing and spintronics. Despite the recent impressive breakthroughs in extending the magnetic blocking temperatures beyond liquid‐nitrogen temperatures, significant challenges await in terms of integrating and addressing such compounds in devices. With this ultimate goal in mind, the design of multifunctional SMMs not only allows to imbue molecules of interest with specific properties that would allow for in situ monitoring of the SMM operation in real time, but can also provide critical insights into our understanding of the magnetic behaviour. In this Review, we highlight how magnetism and luminescence can be harmoniously combined within single molecules to achieve these objectives. The key design principles to attain the simultaneous combination of photoluminescence and slow relaxation of the magnetization are discussed, along with an outlook on how such molecules could be beneficial for emerging next‐generation spintronics devices.

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Section: Luminescent Smmsmentioning

confidence: 99%

Shining New Light on Multifunctional Lanthanide Single‐Molecule Magnets

2020

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“…In den letzten Jahren wurden Beispiele von Yb 3+ -Komplexen, die zugleich magnetische Eigenschaften und eine ligandensensibilisierte Lumineszenz aufweisen, beschrieben. [113][114][115][116][117] Die Energiebarriere (U eff ), die durch eine geeignete Konzeption der Systeme realisiert werden kann, kann Werte bis zu 45 cm À1 erreichen; [116] dies verdeutlicht jedoch auch, dass weitere Forschungsbemühungen erforderlich sind, damit sie gegen Tb 3+ -u nd Dy 3+ -SMMs bestehen kçnnen. Darüber hinaus zeigen Yb 3+ -Systeme in der Regel eine relativ schwache Emission infolge der effektiven Lçschung des im NIR emittierenden Zustands dieses Lanthanoids.D ie Phononenunterstützte Abregung dieser Niveaus resultiert aus der Wechselwirkung des Metallzentrums mit hochenergetischen Oszillatoren in der ersten oder zweiten Koordinationssphäre.…”

Section: Methodsunclassified

“…SMMs auf Basis dieser Ionen erfordern eine starke äquatoriale Komponente des Ligandenfeldes, um eine axiale magnetische Anisotropie zu fördern. In den letzten Jahren wurden Beispiele von Yb 3+ ‐Komplexen, die zugleich magnetische Eigenschaften und eine ligandensensibilisierte Lumineszenz aufweisen, beschrieben [113–117] . Die Energiebarriere ( U eff ), die durch eine geeignete Konzeption der Systeme realisiert werden kann, kann Werte bis zu 45 cm −1 erreichen; [116] dies verdeutlicht jedoch auch, dass weitere Forschungsbemühungen erforderlich sind, damit sie gegen Tb 3+ ‐ und Dy 3+ ‐SMMs bestehen können.…”

Section: Lumineszierende Smmsunclassified

Multifunktionale Einzelmolekülmagnete auf Lanthanoidbasis in neuem Licht

2020

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“…However these have been mainly performed on Tb III and Dy III ions because of their efficient SMM behaviors coupled with good emission properties (see ref [54] for full review) [55][56][57][58][59]. The approach has been less developed on NIR emissive Ln-SMM where mainly Er III -SMM [60][61][62][63][64][65] and Yb III -SMM [29,[66][67][68][69][70][71][72][73] have been investigated. The drawback of these ions is that their emission is not always strong enough to allow for reliable magneto-luminescent correlations.…”

Section: Luminescence Measurementsmentioning

confidence: 99%

Closing the Circle of the Lanthanide-Murexide Series: Single-Molecule Magnet Behavior and Near-Infrared Emission of the NdIII Derivative

et al. 2018

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Up to now, even if murexide-based complexometric studies are performed with all 3d or 4f ions, the crystal structures of the light-lanthanide derivatives of the lanthanide-murexide series are unknown. In this work, we report the crystal structure of the NdIII derivative named NdMurex. Contrary to all known complexes of the 3d or 4f series, a dimeric compound was obtained. As for its already reported DyIII and YbIII parents, the NdIII complex responsible for the color-change behaves as a single-molecule magnet (SMM). This behavior was observed on both the crystalline (NdMurex: Ueff = 6.20(0.80) K, 4.31 cm−1; τ0 = 2.20(0.92) × 10−5 s, Hdc = 1200 Oe) and anhydrous form (NdMurexAnhy: Ueff = 6.25(0.90) K, 4.34 cm−1; τ0 = 4.85(0.40) × 10−5 s, Hdc = 1200 Oe). The SMM behavior is reported also for the anhydrous CeIII derivative (CeMurexAnhy: Ueff = 5.40(0.75) K, 3.75 cm−1; τ0 = 3.02(1.10) × 10−5 s, Hdc = 400 Oe). The Near-Infrared Emission NIR emission was observed for NdMurexAnhy and highlights its bifunctionality.

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Luminescence and Single‐Molecule‐Magnet Behaviour in Lanthanide Coordination Complexes Involving Benzothiazole‐Based Tetrathiafulvalene Ligands

Cited by 16 publications

References 74 publications

Shining New Light on Multifunctional Lanthanide Single‐Molecule Magnets

Shining New Light on Multifunctional Lanthanide Single‐Molecule Magnets

Multifunktionale Einzelmolekülmagnete auf Lanthanoidbasis in neuem Licht

Closing the Circle of the Lanthanide-Murexide Series: Single-Molecule Magnet Behavior and Near-Infrared Emission of the NdIII Derivative

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