Structural Distortion Controlled Spin-Crossover Behavior

Two mononuclear isomorphous complexes Fe­(<b>L1</b>)₂(SCN)₂ (<b>1</b>) and Fe­(<b>L2</b>)₂(SCN)₂ (<b>2</b>) [<b>L1</b> = 2-(pyridin-3-yl)-1<i>H</i>-imidazo­[4,5-<i>f</i>]­1,10-phenanthroline; <b>L2</b> = 2-(pyridin-4-yl)-1<i>H</i>-imidazo­[4,5-<i>f</i>]­1,10-phenanthroline] were obtained based on 1,10-phenanthroline derivatives. Due to the different structural distortion in the coordination geometries, <b>1</b> exhibits gradual spin transition around room temperature (<i>T</i>_1/2 = 315 K), while <b>2</b> displays a stable high-spin state

Rationally Designed Porous MnO_<i>x</i>–FeO_<i>x</i> Nanoneedles for Low-Temperature Selective Catalytic Reduction of NO_<i>x</i> by NH₃

In this work, a novel porous nanoneedlelike MnO_<i>x</i>–FeO_<i>x</i> catalyst (MnO_<i>x</i>–FeO_<i>x</i> nanoneedles) was developed for the first time by rationally heat-treating metal–organic frameworks including MnFe precursor synthesized by hydrothermal method. A counterpart catalyst (MnO_<i>x</i>–FeO_<i>x</i> nanoparticles) without porous nanoneedle structure was also prepared by a similar procedure for comparison. The two catalysts were systematically characterized by scanning and transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, X-ray photoelectron spectroscopy, hydrogen temperature-programmed reduction, ammonia temperature-programmed desorption, and in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFT), and their catalytic activities were evaluated by selective catalytic reduction (SCR) of NO_<i>x</i> by NH₃. The results showed that the rationally designed MnO_<i>x</i>–FeO_<i>x</i> nanoneedles presented outstanding low-temperature NH₃-SCR activity (100% NO_<i>x</i> conversion in a wide temperature window from 120 to 240 °C), high selectivity for N₂ (nearly 100% N₂ selectivity from 60 to 240 °C), and excellent water resistance and stability in comparison with the counterpart MnO_<i>x</i>–FeO_<i>x</i> nanoparticles. The reasons can be attributed not only to the unique porous nanoneedle structure but also to the uniform distribution of MnO_<i>x</i> and FeO_<i>x</i>. More importantly, the desired Mn⁴⁺/Mn^<i>n</i>+ and O_α/(O_α + O_β) ratios, as well as rich redox sites and abundant strong acid sites on the surface of the porous MnO_<i>x</i>–FeO_<i>x</i> nanoneedles, also contribute to these excellent performances. In situ DRIFT suggested that the NH₃-SCR of NO over MnO_<i>x</i>–FeO_<i>x</i> nanoneedles follows both Eley–Rideal and Langmuir–Hinshelwood mechanisms

Hydrothermal Synthesis of CaIn₂S₄‑Reduced Graphene Oxide Nanocomposites with Increased Photocatalytic Performance

A series of CaIn₂S₄-reduced graphene oxide (RGO) nanocomposites with different RGO contents were fabricated using a facile hydrothermal approach. During the hydrothermal process, the reduction of graphene oxide to RGO, in situ deposition of synthesized CaIn₂S₄ nanoparticles on RGO nanosheets and formation of chemical-bonding CaIn₂S₄-RGO nanocomposites were performed simultaneously. Under visible light irradiation, the as-prepared CaIn₂S₄-RGO nanocomposites showed enhanced photocatalytic performance for rhodamine B degradation and phenol oxidation. The sample with 5 wt % RGO hybridized CaIn₂S₄ exhibited the highest photocatalytic activity. The enhancement of photocatalytic performance may be related to the increased adsorption/reaction sites, positive shift of the valence band potential, and high separation efficiency of photogenerated charge carriers due to the electronic interaction between CaIn₂S₄ and RGO. We hope that this work can not only provide an in-depth study on the photocatalytic mechanism of RGO-enhanced activity, but also provide some insights for fabricating efficient and stable RGO-based photocatalysts in the potential applications of purifying polluted water resources

Additional file 1 of Incidence and risk of fatal adverse events in cancer patients treated with HER2-targeted antibody-drug conjugates: a systematic review and meta-analysis of randomized controlled trials

Supplementary Material

Two Magnetic Switching Complexes Based on the Fe^II Ion

Two neutral mononuclear iron­(II) complexes with different spin-crossover (SCO) properties, Fe­(<b>L1</b>)₂(SCN)₂ (<b>1</b>) and Fe­(<b>L2</b>)₂(SCN)₂ (<b>2</b>) (<b>L1</b> = 2-(thiophen-3-yl)-1<i>H</i>-imidazo­[4,5-<i>f</i>]­[1,10]­phenanthroline and <b>L2</b> = 2-(thiophen-2-yl)-1<i>H</i>-imidazo­[4,5-<i>f</i>]­[1,10]­phenanthroline), were solvothermally synthesized. With the different substituted position in 1,10-phenanthroline derivatives, <b>1</b> exhibits gradual SCO around room temperature with <i>T</i>_1/2 = 280 K, while <b>2</b> displays abrupt SCO with 10 K hysteresis at <i>T</i>_1/2↓ = 210 K and <i>T</i>_1/2↑ = 220 K

A Series of Weakley-type Polyoxomolybdates: Synthesis, Characterization, and Magnetic Properties by a Combined Experimental and Theoretical Approach

Using DCC as the dehydrating agent, a series of Weakley-type polyoxomolybdates [Bu₄N]₃{Ln­[Mo₅O₁₃(OMe)₄(NO)]₂} (Ln = Tb, Dy, Ho, Er) were synthesized in a one-pot reaction and structurally characterized by elemental, IR, UV–vis analysis, PXRD, and single-crystal X-ray diffraction. Furthermore, the static and dynamic measurements were utilized to investigate their magnetic performances. Typically, slow relaxation of magnetization was observed for Dy analogues with an energy barrier for the reversal of the magnetization of 50 K, which is the highest barrier height observed on the polyoxomolybdates-based single-molecule magnets (SMMs). For a deep understanding of the appearance of the SMM behavior on Weakley-type polyoxomolybdates series, <i>ab initio</i> calculations on {Dy­[Mo₅O₁₃(OMe)₄(NO)]₂}^3– have been conducted

A Family of Co^IICo^III₃ Single-Ion Magnets with Zero-Field Slow Magnetic Relaxation: Fine Tuning of Energy Barrier by Remote Substituent and Counter Cation

The synthesis, structures, and magnetic properties of a family of air-stable star-shaped Co^IICo^III₃ complexes were investigated. These complexes contain only one paramagnetic Co­(II) ion with the approximate <i>D</i>₃ coordination environment in the center and three diamagnetic Co­(III) ions in the peripheral. Magnetic studies show their slow magnetic relaxation in the absence of an applied dc field, which is characteristic behavior of single-molecule magnets (SMMs), caused by the individual Co­(II) ion with approximate <i>D</i>₃ symmetry in the center. Most importantly, it was demonstrated that the anisotropy energy barrier can be finely tuned by the periphery substituent of the ligand and the countercation. The anisotropy energy barrier can be increased significantly from 38 K to 147 K

Table_1_Valsa mali Pathogenic Effector VmPxE1 Contributes to Full Virulence and Interacts With the Host Peroxidase MdAPX1 as a Potential Target.DOCX

<p>The Valsa canker, caused by Valsa mali (V. mali), is a destructive disease of apple in Eastern Asia. Effector proteins are important for fungal pathogenicity. We studied a candidate effector VmPxE1 isolated based on the genome information of V. mali. By using the yeast invertase secretion assay system, VmPxE1 was shown to contain a signal peptide with secretory functions. VmPxE1 can suppress BCL-2-associated X protein (BAX)-induced cell death with a high efficacy of 92% in Nicotiana benthamiana. The expression of VmPxE1 was upregulated during the early infection stage and deletion of VmPxE1 led to significant reductions in virulence on both apple twigs and leaves. VmPxE1 was also shown to target an apple ascorbate peroxidase (MdAPX1) by the yeast two-hybrid screening, bimolecular fluorescence complementation and in vivo co-immunoprecipitation. Sequence phylogenetic analysis suggested that MdAPX1 was an ascorbate peroxidase belonging to a subgroup of heme-dependent peroxidases of the plant superfamily. The ectopic expression of MdAPX1 in the mutant of VmPxE1 significantly enhanced resistance to H₂O₂, while the presence of VmPxE1 seems to disturb MdAPX1 function. The present results provide insights into the functions of VmPxE1 as a candidate effector of V. mali in causing apple canker.</p

Image_3_Valsa mali Pathogenic Effector VmPxE1 Contributes to Full Virulence and Interacts With the Host Peroxidase MdAPX1 as a Potential Target.TIF

<p>The Valsa canker, caused by Valsa mali (V. mali), is a destructive disease of apple in Eastern Asia. Effector proteins are important for fungal pathogenicity. We studied a candidate effector VmPxE1 isolated based on the genome information of V. mali. By using the yeast invertase secretion assay system, VmPxE1 was shown to contain a signal peptide with secretory functions. VmPxE1 can suppress BCL-2-associated X protein (BAX)-induced cell death with a high efficacy of 92% in Nicotiana benthamiana. The expression of VmPxE1 was upregulated during the early infection stage and deletion of VmPxE1 led to significant reductions in virulence on both apple twigs and leaves. VmPxE1 was also shown to target an apple ascorbate peroxidase (MdAPX1) by the yeast two-hybrid screening, bimolecular fluorescence complementation and in vivo co-immunoprecipitation. Sequence phylogenetic analysis suggested that MdAPX1 was an ascorbate peroxidase belonging to a subgroup of heme-dependent peroxidases of the plant superfamily. The ectopic expression of MdAPX1 in the mutant of VmPxE1 significantly enhanced resistance to H₂O₂, while the presence of VmPxE1 seems to disturb MdAPX1 function. The present results provide insights into the functions of VmPxE1 as a candidate effector of V. mali in causing apple canker.</p

CaIn₂O₄/Fe-TiO₂ Composite Photocatalysts with Enhanced Visible Light Performance for Hydrogen Production

A series of CaIn₂O₄/Fe-TiO₂ composite photocatalysts with tunable Fe-TiO₂ contents were prepared in which Fe-TiO₂ nanoparticles were uniformly deposited onto the surface of CaIn₂O₄ nanorods. The photocatalytic activities of Pt-loaded CaIn₂O₄/Fe-TiO₂ composites were evaluated for H₂ evolution from aqueous KI solution under visible light irradiation. It was found that the composites showed higher H₂ evolution rates in comparison with pure CaIn₂O₄ or Fe-TiO₂, which could be attributed to the increased surface area and enhanced visible light absorption. A high H₂ evolution rate of 280 μmol h^–1 g^–1 was achieved when the mass ratio of Fe-TiO₂ to CaIn₂O₄ was 0.5, which was 12.3 and 2.2 times higher than that of pure CaIn₂O₄ and Fe-TiO₂, respectively. Furthermore, the interfaces between CaIn₂O₄ nanorods and Fe-TiO₂ nanoparticles facilitated efficient charge separation that also led to the improved photocatalytic activity. This study may provide some inspiration for the fabrication of visible-light-driven photocatalysts with efficient and stable performance