Morphological Predictors of Primary Lung Cancer among Part-Solid Ground-Grass Nodules on High-Resolution CT.

Recent advancements in computed tomography (CT) scanning have improved the detection rates of peripheral pulmonary nodules, including those with ground-glass opacities (GGOs). This study focuses on part-solid pure ground-glass nodules (GGNs) and aims to identify imaging predictors that can reliably differentiate primary lung cancer from nodules with other diagnoses among part-solid GGNs on high-resolution CT (HRCT). A retrospective study was conducted on 609 patients who underwent surgical treatment or observation for lung nodules.

Four Redox Isomers of a [3 × 3] Copper-Iron Heterometal Grid.

A mixed-valence heterometallic nonanuclear [3 × 3] grid complex, [CuCuFe(L)](BF)·MeOH·9HO (; MeOH = methanol), was synthesized by a one-pot reaction of copper and iron ions with multidentate ligand 2,6-bis[5-(2-pyridinyl)-1-pyrazol-3-yl]pyridine (HL). showed five quasi-reversible one-electron redox processes centered at +0.74, +0.

Selective electrochemical CO conversion with a hybrid polyoxometalate.

A multi-component coordination compound, in which ruthenium antenna complexes are connected to a polyoxotungstate core is presented. This hybrid cluster effectively promotes the electrochemical conversion of CO to C1 feedstocks, the selectivity of which can be controlled by the acidity of the media.

Colossal Anisotropic Thermal Expansion through Coupling Spin Crossover and Rhombus Deformation in a Hexanuclear {Fe Fe } Compound.

Colossal and anisotropic thermal expansion is a key function for microscale or nanoscale actuators in material science. Herein, we present a hexanuclear compound of [(Tp*)Fe (CN) ] [Fe (Ppmp)] ⋅2 CH OH (1, Tp*=hydrotris(3,5-dimethyl-pyrazol-1-yl)borate and Ppmp=2-[3-(2'-pyridyl)pyrazol-1-ylmethyl]pyridine), which has a rhombic core structure abbreviated as {Fe Fe }. Magnetic susceptibility measurements and single-crystal X-ray diffraction analyses revealed that 1 underwent thermally-induced spin transition with the thermal hysteresis.

Elucidating the exchange interactions in a {GdCu} propellor.

The multinucleating ligand 2,2'-(propane-1,3-diyldiimino)bis[2-(hydroxymethyl)-propane-1,3-diol] (bis-tris propane, HL) is used in the design of a new family of 3d-4f complexes that display an unusual {LnCu} four-blade propeller topology. We report the synthesis, structure and magnetic characterisation of [LnCu(HL)](Cl)(ClO)·6CHOH, where Ln = Gd (1), Tb (2), Dy (3), La (4). Previously we have used CHCOO and NO as co-ligands with bis-tris propane, but here the use of Cl and ClO leads to coordination of four {Cu(HL)} units around the central Ln ion.

Tetranuclear [CuLn] complexes derived from a tetraketone-type ligand.

A series of tetranuclear [CuLn] complexes, [CuGd(L)(NO)(HO)](NO)·HO (1), [CuTb(L)(NO)(HO)](NO) (2) and [CuDy(L)(NO)(HO)]·1.5(HO) (3), were synthesized by a one-pot reaction using a simple tetraketone-type ligand (HL = (3,5)-4,5-dihydroxy-3,5-octadiene-2,7-dione). X-ray structural analyses revealed that each complex has a planar tetranuclear core of [CuLn] (Ln = Gd, Tb, and Dy), in which the Ln ion is accommodated in the centre of a CuO metallocycle.

Simultaneous Photo-Induced Magnetic and Dielectric Switching in an Iron(II)-Based Spin-Crossover Hofmann-Type Metal-Organic Framework.

Molecular materials possessing photo-tunable polarization switching is promising for optical switches, smart sensors, and data storage devices. However, it is challenging to devise a molecular material featuring simultaneous switchable magnetic and dielectric properties with regard to non-invasive and convenient light stimulus. Herein, we report a new Hofmann-type metal-organic framework (MOF) {Fe(bpt)[Pt(CN) ]} ⋅ 0.

Spin-Crossover Tuned Rotation of Pyrazolyl Rings in a 2D Iron(II) Complex towards Synergetic Magnetic and Dielectric Transitions.

Materials showing synergy of magnetic and dielectric transitions are promising candidates for future molecular devices. The challenge is how to realize synergy between spin and dielectric transitions with responses to external stimuli. Herein, we design a 2D spin crossover (SCO) complex, [Fe (dpa)][(pzTp)Fe (CN) ] (1) (dpa=1,2-bis(4-pyridyl)ethyne and pzTp=tetrakis(pyrazolyl)borate).

Manipulating Selective Metal-to-Metal Electron Transfer to Achieve Multi-Phase Transitions in an Asymmetric [Fe Co]-Assembled Mixed-Valence Chain.

Manipulation of multi-functions in molecular materials is promising for future switching and memory devices, although it is currently difficult. Herein, we assembled the asymmetric {Fe Co} unit into a cyanide-bridged mixed-valence chain {[(Tp)Fe(CN) ] Co(BIT)} ⋅ 2CH OH (1) (Tp=hydrotris(pyrazolyl)borate and BIT=3,4-bis-(1H-imidazol-1-yl)thiophene), which showed reversible multi-phase transitions accompanied by photo-switchable single-chain magnet properties and a dielectric anomaly. Variable-temperature X-ray structural studies revealed thermo- and photo-induced selective electron transfer (ET) between the Co and one of the Fe ions.

A ring of grids: a giant spin-crossover cluster.

Mononuclear and icosanuclear spin-crossover complexes, [Fe(HL)](BF) (1) and [FeII20(L)](BF) (2), were synthesized using an asymmetric multidentate ligand (HL). 1 has a bis-chelate structure with two protonated ligands, while 2 has a ring-shape structure comprising four [2 × 2] grid moieties and four mononuclear units.

Switching the magnetic hysteresis of an [Fe-NC-W]-based coordination polymer by photoinduced reversible spin crossover.

Magnetic bistable materials that feature magnetic hysteresis are comparable to elementary binary units and promising for application in switches and memory devices. In this work, we report a material that consists of parallel cyanide-bridged [Fe-W] coordination chains linked together through rigid bis(imidazolyl)-benzene ligands and displays multiple magnetic states. The paramagnetic high-spin and diamagnetic low-spin states of the spin-crossover Fe ions can be interconverted by reversible light-induced excited spin state trapping (LIESST) by alternating between light irradiation of 808 and 473 nm.

A Mixed-Valence {Fe } Cluster Exhibiting Metal-to-Metal Charge-Transfer-Switched Spin Crossover.

It is promising and challenging to manipulate the electronic structures and functions of materials utilizing both metal-to-metal charge transfer (MMCT) and spin-crossover (SCO) to tune the valence and spin states of metal ions. Herein, a metallocyanate building block is used to link with a Fe -triazole moiety and generates a mixed-valence complex {[(Tp )Fe (CN) ] [Fe (trz-ph) ]}⋅[Ph PMe] ⋅[(Tp )Fe (CN) ] (1; trz-ph=4-phenyl-4H-1,2,4-triazole). Moreover, MMCT occurs between Fe and one of the Fe sites after heat treatment, resulting in the generation of a new phase, {[(Tp )Fe (CN) ][(Tp )Fe (CN) ] [Fe Fe (trz-ph) ]}⋅ [Ph PMe] ⋅[(Tp )Fe (CN) ] (1 a).

A Ferromagnetically Coupled Octanuclear Manganese(III) Cluster: A Single-Molecule Magnet with a Spin Ground State of = 16.

An octanuclear manganese complex, [Mn(μ-O)(L)(OMe)(OAc)(OCHCHNH)] [; HL = 3-(dimethoxymethyl)-2-hydroxybenzoic acid], was synthesized with an extended cubane core structure consisting of eight Mn ions bridged by O atoms. Cryomagnetic studies revealed that showed a single-molecule-magnet behavior with an = 16 spin ground state.

Heteroleptic iron(ii) complexes with naphthoquinone-type ligands.

Heteroleptic iron complexes with a naphthoquinone-type ligand, 2-(pyridin-2-yl)-1H-naphtho[2,3-d]imidazole-4,9-dione (HL), were synthesized, and their structures and magnetic properties were investigated. Two spin-crossover complexes, [Fe(L)2(L1)] (1, L1 = ethylenediamine) and [Fe(L)2(L2)] (2, L2 = cyclohexanediamine) were structurally characterized at 100 K and 270 K, and their gradual spin crossover behavior observed by magnetic susceptibility measurements and confirmed by Mössbauer spectroscopic analyses. Two homologous iron(ii) complexes, [Fe(L)2(L3c)] (3, L3c = diimino benzoquinone) and [Fe(L)2(L4c)] (4, L4c = iminosuccinonitrile), were found to exist in the low-spin state in the range of 10-300 K.

A triple-triangle cluster derived from a simple tridentate ligand.

The heptanuclear ferric cluster, [FeIII7(O)6(HL)5(H2L)(H2O)8](BF4)4 (H2L = 2,6-bis(1,5-diphenyl-1H-pyrazol-3-yl)pyridine), was synthesized by the reaction of the planar tridentate ligand H2L with iron(ii) tetrafluoroborate hexahydrate. The cluster has a corner-shared triple-triangle core structure connected by three μ-O atoms, and it has a spin-frustrated ferrimagnetic spin ground state of S = 19/2.

Asymmetric Hybrid Polyoxometalates: A Platform for Multifunctional Redox-Active Nanomaterials.

Access to asymmetrically functionalized polyoxometalates is a grand challenge as it could lead to new molecular nanomaterials with multiple or modular functionality. Now, a simple one-pot synthetic approach to the isolation of an asymmetrically functionalized organic-inorganic hybrid Wells-Dawson polyoxometalate in good yield is presented. The cluster bears two organophosphonate moieties with contrasting physical properties: a chelating metal-binding group, and a long aliphatic chain that facilitates solvent-dependent self-assembly into soft nanostructures.

Effect of Intermolecular Interactions on Metal-to-Metal Charge Transfer: A Combined Experimental and Theoretical Investigation.

Understanding the effects of intermolecular interactions on metal-to-metal charge transfer (MMCT) is crucial to develop molecular devices by grafting MMCT-based molecular arrays. Herein, we report a series of solvent-free {Fe Co } compounds sharing the same cationic tetranuclear {[Fe(PzTp)(CN) ] [Co(dpq) ] } (PzTp =tetrakis(pyrazolyl)borate, dpq=dipyrido[3,2-d:2',3'-f]quinoxaline) square units but having anions with different size, including BF , PF , OTf , and [Fe(PzTp)(CN) ] . Intermolecular π⋅⋅⋅π interactions between dpq ligands, which coordinate to cobalt ions in the {[Fe(PzTp)(CN) ] [Co(dpq) ] } units, can be modulated by introducing different counterions, regulating the distortion of the CoN octahedron and ligand field around the cobalt ions.

Intramolecular Electron Transfers in a Series of [CoFe] Tetranuclear Complexes.

Discrete cyanide-bridged Co-Fe multinuclear complexes can be considered as functional units of bulk Co-Fe Prussian blue analogues, and they have been recognized as a new class of switching molecules in the last decade. The switching property of the cyanide-bridged Co-Fe complexes is based on intramolecular electron transfers between Co and Fe ions, and we herein refer to this phenomenon as an electron transfer-coupled spin transition (ETCST). Although there have been numerous reports on the complexes exhibiting ETCST behavior, the systematic study of the substituent effects on the thermal ETCST equilibrium in solution has not been reported yet, and the rational control of the equilibrium temperature remains challenging.

Solid-State Hydrogen-Bond Alterations in a [Co Fe ] Complex with Bifunctional Hydrogen-Bonding Donors.

A hydrogen-bonding donor-acceptor system, [Co Fe (bpy*) (CN) (tp*) ](PF ) ⋅2ABA⋅4BN⋅2PE (1 s ), was prepared by co-crystallization of an external stimuli-responsive cyanide-bridged tetranuclear [Co Fe ] complex and bifunctional hydrogen-bonding donors, p-aminobenzoic acid. Compound 1 s exhibited a gradual electron-transfer-coupled spin transition (ETCST), and the removal of solvent molecules led to an abrupt thermal ETCST behavior with increased transition temperature. X-ray structural analysis revealed that the modification of ETCST was caused by a significant alteration of a hydrogen-bonding mode between the tetranuclear [Co Fe ] cations and ABA molecules.

A Brønsted-Ligand-Based Iron Complex as a Molecular Switch with Five Accessible States.

A mononuclear Fe complex, prepared with a Brønsted diacid ligand, H L (H L=2-[5-phenyl-1H-pyrazole-3-yl] 6-benzimidazole pyridine), shows switchable physical properties and was isolated in five different electronic states. The spin crossover (SCO) complex, [Fe (H L) ](BF ) (1 ), exhibits abrupt spin transition at T =258 K, and treatment with base yields a deprotonated analogue [Fe (HL) ] (1 ), which shows gradual SCO above 350 K. A range of Fe analogues were also characterized.

Substituent dependence on the spin crossover behaviour of mononuclear Fe(ii) complexes with asymmetric tridentate ligands.

Three mononuclear iron(ii) complexes of the formula [Fe(HL)](BF)·x(solv.) (HL = 2-[5-(R-phenyl)-1H-pyrazole-3-yl] 6-benzimidazole pyridine; HL: R = 4-methylphenyl, HL, R = 2,4,6-trimethylphenyl, HL, R = 2,3,4,5,6-pentamethylphenyl) (1, HL; 2, HL; 3, HL) with asymmetric tridentate ligands (HL) were synthesized and their structures and magnetic behaviour investigated. Significant structural distortions of the dihedral angles between phenyl and pyrazole groups were observed and found to depend on the nature of the substituent groups.

Structure Switching and Modulation of the Magnetic Properties in Diarylethene-Bridged Metallosupramolecular Compounds by Controlled Coordination-Driven Self-Assembly.

We report three self-assembled iron complexes that comprised an anti-parallel open form (o-L ), a parallel open form (o-L ), and a closed form (c-L) of diarylethene conformers. Under kinetic control, Fe (o-L ) was isolated, which exhibited a dinuclear structure with diamagnetic properties. Under light-irradiation control, Fe (c-L) was prepared and exhibited paramagnetism and spin-crossover behaviour.

Ferrihydrite Particle Encapsulated within a Molecular Organic Cage.

Metal oxides with sizes of a few nanometers show variable crystal and electronic structures depending on their dimensions, and the synthesis of metal oxide particles with a desired size is a key technology in materials science. Although discrete metal oxide particles with an average diameter ( d) smaller than 2 nm are expected to show size-specific properties, such ultrasmall metal oxide particles are significantly limited in number. In nature, on the other hand, nanosized ferrihydrite (Fh), which is ferric oxyhydroxide, occurs as a result of biomineralization in ferritin, an iron storage protein cage.

Carboxylic Acid Functionalized Spin-Crossover Iron(II) Grids for Tunable Switching and Hybrid Electrode Fabrication.

Two carboxyl-substituted iron(II) grids, one protonated, [Fe(HL)](BF)·4MeCN·AcOEt (1), and the other deprotonated, [Fe(L)]·DMSO·EtOH (2), where HL = 4-{4,5-bis[6-(3,5-dimethylpyrazol-1-yl)pyrid-2-yl]-1 H-imidazol-2-yl}benzoic acid, were synthesized. Single-crystal X-ray structure analyses reveal that both complexes have a tetranuclear [2 × 2] grid structure. 1 formed one-dimensional chains through intermolecular hydrogen bonds between the carboxylic acid units of neighboring grids, while 2 formed two-dimensional layers stabilized by π-π-stacking interactions.

Two-electron redox-active tricyano iron(ii) complex with 2,4,6-tris(2-pyrimidyl)-1,3,5-triazine as a building block for coordination polymers.

A new tricyano iron(ii) building unit, [{K(H2O)4}{FeII(CN)3(L)}]·3H2O (1), was synthesized by the reaction of Moor's salts with 2,4,6-tris(2-pyrimidyl)-1,3,5-triazine (L) as a capping ligand. X-ray structural analysis reveals that the mononuclear iron(ii) tricyano complex consists of one ligand and three cyanide groups, with K+ ions coordinated between neighboring units to form a one-dimensional chain network structure. 1 shows two reversible redox waves at +0.