A5086562287- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Lanthanide and Transition Metal Complexes
- Metal-Organic Frameworks: Synthesis and Applications
- Organic and Molecular Conductors Research
- Electron Spin Resonance Studies
- Porphyrin and Phthalocyanine Chemistry
- Shape Memory Alloy Transformations
- Magnetic and transport properties of perovskites and related materials
- Ferroelectric and Piezoelectric Materials
- Luminescence Properties of Advanced Materials
- Advanced Battery Materials and Technologies
- Crystallography and molecular interactions
- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Magnetic properties of thin films
- Radioactive element chemistry and processing
- Electromagnetic wave absorption materials
- Graphene research and applications
University of Tsukuba
2023-2025
The University of Tokyo
2016-2024
Xiamen University
2024
Lanthanide(III)-based coordination complexes have been explored as a source of bifunctional molecular materials combining Single-Molecule Magnet (SMM) behavior with visible-to-near-infrared photoluminescence. In pursuit more advanced multifunctionality, the next target is to functionalize crystalline solids based on emissive nanomagnets toward high proton conductivity and an efficient luminescent thermometric effect. Here, unique multifunctional molecule-based material,...
Microporous magnets compose a class of multifunctional molecule-based materials where desolvation-driven structural transformation leads to the switching magnetic properties. Herein, we present special type microporous magnet dehydration-hydration process within bimetal coordination framework results in emissive DyIII single-molecule (SMMs). We report three-dimensional (3-D) cyanido-bridged polymer, {[DyIII(H2O)2][CoIII(CN)6]}·2.2H2O (1), and its dehydrated form {DyIII[CoIII(CN)6]} (2),...
A two-step hysteretic FeII spin crossover (SCO) effect was achieved in programmed layered Cs{[Fe(3-CNpy)2 ][Re(CN)8 ]}⋅H2 O (1) (3-CNpy=3-cyanopyridine) assembly consisting of cyanido-bridged -ReV square grid sheets bonded by Cs+ ions. The presence two non-equivalent sites and the conjunction 2D bimetallic coordination network with non-covalent interlayer interactions involving , [ReV (CN)8 ]3- ions, 3-CNpy ligands, leads to occurrence steps thermal SCO strong cooperativity giving a double...
A conjunction of Single-Molecule Magnet (SMM) behavior and luminescence thermometry is an emerging research line aiming at contactless read-out temperature in future SMM-based devices. The shared working range between slow magnetic relaxation the thermometric response typically narrow or absent. We report TbIII -based emissive SMMs formed a cyanido-bridged framework whose properties are governed by reversible structural transformation from [TbIII (H2 O)2 ][CoIII (CN)6 ] ⋅ 2.7H2 O (1) to its...
Coordination complexes of lanthanide(3+) ions can combine Single-Molecule Magnetism (SMM) with thermally modulated luminescence applicable in optical thermometry. We report an innovative approach towards high performance SMM-based thermometers which explores tunable anisotropy and the re-absorption effect Ho
A cyanido-bridged layered {[Dy(III)(4-OHpy)2(H2O)3][Co(III)(CN)6]}·0.5H2O (1) (4-OHpy = 4-hydroxypyridine) framework with dual photo-luminescence and magnetic properties was prepared. 1 exhibits visible emission whose color, yellow to greenish-blue, is switchable by selected wavelengths of UV excitation light. Magnetic data revealed that shows not only the slow relaxation a typical Dy(III) single-ion origin but also process caused dipole-magnetic dipole interactions between neighbouring centers.
Solid refrigerants exhibiting a caloric effect upon applying external stimuli are receiving attention as one of the next-generation refrigeration technologies. Herein, we report new inorganic refrigerant, rubidium cyano-bridged manganese-iron-cobalt ternary metal assembly (cyano-RbMnFeCo). Cyano-RbMnFeCo shows reversible barocaloric with large adiabatic temperature changes 74 K (from 57 °C to -17 °C) at 340 MPa, and 85 88 3 560 MPa. Such have yet be reported among effects in solid-solid...
Abstract Luminescent coordination polymers, including metal–organic frameworks, serve as a platform for optical sensing of physical and chemical stimuli, temperature or pressure the former, gases, solvent vapors, explosives, toxic species, etc. latter. The related materials built uranyl cations, UO 2 2+ , remain unexplored, despite their tunable photoluminescence. While recently, bimetallic supramolecular systems cyanido metal complexes have proven successful pathway toward...
Cobalt(<sc>iii</sc>) replaced with heavier rhodium(<sc>iii</sc>) in the Dy–Co/Rh molecular materials modulates their photoluminescent and magnetic properties.
The rare octahedral Yb<sup>III</sup> complexes formed in the bimetallic Yb–Co chains reveal significant magnetic anisotropy and photoluminescence activity near-infrared range.
Nd 3+ ions incorporated into hybrid layers built of [M(CN) 8 ] 4− (M = Mo IV or W ) and pyrazine N , ′-dioxide linkers form enantiomorphic materials exhibiting tunable NIR luminescence, SHG activity, slow magnetic relaxation.
A near-infrared emissive and magnetically anisotropic Nd(iii) complex is formed within a hybrid organic-inorganic {[NdIII(pzdo)(H2O)4][CoIII(CN)6]}·0.5(pzdo)·4H2O (1) (pzdo = pyrazine-N,N'-dioxide) ladder chain built of coexisting Nd-pzdo-Nd Nd-NC-Co molecular bridges. 1 reveals two NdIII-centered properties, field-induced slow magnetic relaxation single-ion origin with thermal energy barrier ΔE/kB 51(2) K at Hdc kOe, fluorescence sensitized by organic inorganic linkers.
Tuning of absorption and photoluminescence is achieved in trimetallic EuCoFe cyanido-bridged frameworks through the gradual replacement [Co<sup>III</sup>(CN)<sub>6</sub>]<sup>3−</sup> with [Fe<sup>III</sup>(CN)<sub>6</sub>]<sup>3−</sup>.
Multifunctional optical materials can be realized by combining stimuli-responsive photoluminescence (PL), e.g., thermometry, with non-linear (NLO) effects, such as second-harmonic generation (SHG). We report a novel approach towards SHG-active luminescent thermometers achieved constructing unique iridium(iii) complexes, cis-[IrIII(CN)2(R,R-pinppy)2]- (R,R-pinppy = (R,R)-2-phenyl-4,5-pinenopyridine), bearing both chiral 2-phenylpyridine derivative and cyanido ligands, the latter enabling...
The bistability of multiple physical properties driven by external stimuli in a solid is desired prerequisite for its application memory devices with convenient data readout. We present pathway thermal detectable four properties: magnetic, light absorption, second-harmonic generation (SHG), and dielectric. report novel heterometallic (TBA){[FeII(phIN)4][ReV(CN)8]}·(phIN) (1) (TBA = tetrabutylammonium cation, phIN phenyl isonicotinate) cyanido-bridged chain material. Owing to an appropriate...
Cd( ii ) complexes with chiral amines play a dual role in materials incorporating aurophilic stacks, first, breaking the symmetry to generate NLO activity, and second, governing Au⋯Au distances give tunable charge transfer luminescence.
Abstract A two‐step hysteretic Fe II spin crossover (SCO) effect was achieved in programmed layered Cs{[Fe(3‐CNpy) 2 ][Re(CN) 8 ]}⋅H O ( 1 ) (3‐CNpy=3‐cyanopyridine) assembly consisting of cyanido‐bridged ‐Re V square grid sheets bonded by Cs + ions. The presence two non‐equivalent sites and the conjunction 2D bimetallic coordination network with non‐covalent interlayer interactions involving , [Re (CN) ] 3− ions, 3‐CNpy ligands, leads to occurrence steps thermal SCO strong cooperativity...
One of the pathways toward luminescent single-molecule magnets (SMMs) is realized by self-assembly lanthanide(3+) ions with cyanido transition metal complexes. We report a novel family emissive SMMs, {YbIII(4-pyridone)4[FeII(phen)2(CN)2]2}(CF3SO3)3·solv (solv = 2MeCN, 1·MeCN; 2AcrCN, 1·AcrCN; 2PrCN, 1·PrCN; 2MalCN·1MeOH; 1·MalCN; MeCN acetonitrile, AcrCN acrylonitrile, PrCN propionitrile, MalCN malononitrile). They are based on paramagnetic YbIII centers coordinating diamagnetic...
The interest in the generation of photoluminescence lanthanide(III) single-molecule magnets (SMMs) is driven by valuable magneto-optical correlations as well perspectives toward magnetic switching emission and opto-magnetic devices linking SMMs with optical thermometry. In pursuit enhanced anisotropy features, key role played suitable ligands attached to 4f metal ion. this context, cyanido complexes d-block ions, serving expanded metalloligands, are promising. We report two novel discrete...
Crystal engineering of molecular magnetic materials often leads to novel functionalities. In this study, we synthesized an ionic chain magnet, i.e., [NiII(imi)6]{[NiII(imi)4][WV(CN)8]}2·4H2O (imi = imidazole; NiW) comprising anionic cyanido-bridged [NiII(imi)4WV(CN)8]nn– chains and cationic mononuclear [NiII(imi)6]2+ complexes. Ferromagnetic coupling between NiII WV with S 1 1/2, respectively, via a bridging cyanido ligand is found within the chain. However, total magnetization NiW canceled...
Abstract A conjunction of Single‐Molecule Magnet (SMM) behavior and luminescence thermometry is an emerging research line aiming at contactless read‐out temperature in future SMM‐based devices. The shared working range between slow magnetic relaxation the thermometric response typically narrow or absent. We report Tb III ‐based emissive SMMs formed a cyanido‐bridged framework whose properties are governed by reversible structural transformation from [Tb (H 2 O) ][Co (CN) 6 ] ⋅ 2.7H O ( 1 )...
Knowledge of the magnetic domain is indispensable for understanding magnetostatic properties magnets. However, to date, has not yet been reported in field molecule-based Herein, we study domains Two films iron/chromium hexacyanidochromate FexCr1-x[Cr(CN)6]2/3·5H2O (x = 0; Film 1 and x 0.2; 2) were prepared investigation. The temperature evolution surface magnetization was measured using force microscopy. showed a below Curie (TC) its positive-magnetic polarization increased monotonously with...