European Journal of Inorganic Chemistry最新文献

Child's play: The Front Cover shows how two flexible but robust metal–organic frameworks can easily be transformed into each other by the simple removal or adsorption of water molecules when immersed in this solvent. More information can be found in the Research Article by R. F. Mendes and F. A. Almeida Paz (DOI: 10.1002/ejic.202400467).

The Front Cover shows the synthesis of a new cobalt(II) coordination compound containing two 2,2′-bipyridyl ligands, a water molecule and, most interestingly, a sulfate(VI) anion in the coordination sphere. In addition, the newly presented compound [Co(bipy)₂(SO₄)(H₂O)] is perfectly suited as a catalyst in the oligomerization of olefins and leads to the synthesis of oligomers with unique physicochemical properties. More information can be found in the Research Article by M. Pawlak, D. Jacewicz and co-workers (DOI: 10.1002/ejic.202400755).

The Front Cover demonstrates imidazophenanthroline-based iridium(III) cyclometallated complexes that are capable of generating ROS via type II and type II PDT pathways in response to light exposure; this induces DNA damage and thus, ultimately annihilates MDA-MB-231 TNBC cells. The complexes have remarkable photostability that allows them to withstand visible light. Furthermore, the complexes can oxidize NADH and GSH, which triggers oxidative stress in cancer cells. More information can be found in the Research Article by S. Ghosh and P. Paira (DOI: 10.1002/ejic.202400769).

The Front Cover shows a Schlenk flask held by a scientist who is observing the structural diversity in complexes due to the divergence capacity of a malonamides/Ti (NMe₂)₄ system. The variety is created by altering the time (t) and the temperature (simulated by the presence or melting of ice in the flask). The observed nucleophilic behavior of the malonamides can be explained by the classification of electron-donating nitrogen atom substituents displayed on the flask label. More information can be found in the Research Article by E. Bernabé-Pablo and co-workers (DOI: 10.1002/ejic.202400772). Cover design: Daniela Cardona-González and E.B.-P.

The Cover Feature shows the transformation of layered materials through calcination and reconstitution processes. In their Research Article, A. Chetara and A. Bahmani explore how this innovative reconstitution technique is opening up new prospects for advanced nanocomposites, particularly in the nanotechnology sector.

The Front Cover highlights titanium dioxide nanoparticles with distinct crystalline phases, essential for efficient glyphosate adsorption. TiO₂ nanoparticles are also depicted within a mesoporous framework to emphasize their structural influence on adsorption performance. The interaction of glyphosate molecules with the nanoparticle surfaces, set against a water-inspired backdrop, underscores the environmental application and significance of tailored crystalline phases in optimizing remediation strategies. More information can be found in the Research Article by L. Tortora and co-workers.

In this study a series of pyridinyl alcohol ligands (2-pyridinyl-1-cyclohexanol (1), 2-pyridinyl-1,1-diphenyl methanol (2) and 2-pyridinyl-1-phenyl-1-isopropylmethanol (3) have been coordinated to Cu (Cu 1–3). These complexes have been characterised by single-crystal X-ray diffraction. The solid-state structures of the Cu complexes obtained were dependent on the temperature and method used to grow crystals. In the selective oxidation of n-octane the copper catalysts gave yields of up to 25 % towards C8 oxygenates with predominant selectivity to C2-C4 octanones. The exception was a chlorido-bridged dimer, which showed high selectivity to 1-octanol. Products from activation of the C-1 position predominately form in higher yield in the catalytic reactions of copper(II) complexes that exhibit narrower N−Cu−O bite angles. The activity of the Cu catalysts can be attributed to metal-ligand cooperative catalysis that involves the formation of Cu(II) peroxo intermediates. Characterisation of the recovered catalyst, in combination with the addition of a radical inhibitor during the partial oxidation reactions, indicated that the catalytic reaction progresses via a combination of an oxygen rebound mechanism and a radical chain reaction, with the latter mechanism usually dominating.

A Ce-modified Cr-based catalyst supported on Silicalite-1 (S-1) zeolite was synthesized and used for CO₂-ODP (CO₂-assisted oxidative dehydrogenation of propane). Then, reaction and calcination temperature effects on catalytic performance were further studied. The structure of the catalyst was studied by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction of hydrogen (H₂-TPR), and diffuse reflectance ultraviolet-visible spectroscopy (UV-vis). The results show that the distribution of Cr on the catalyst's surface and the amount of lattice oxygen can be changed by introducing Ce into the catalyst to modify the catalyst. After Ce modification, more polymerized Cr⁶⁺ sites and lattice oxygen were formed on the catalyst's surface, which was conducive to increasing the activity and selectivity of the catalyst and reducing the amount of carbon deposition on the catalyst surface. By decreasing the calcination temperature, the amount of polymerized Cr⁶⁺ sites and lattice oxygen can be further increased.

Hydrogen is widely recognized as a clean energy source with vast potential to facilitate the shift toward sustainable energy systems. Seawater electrolysis presents a promising approach for large-scale hydrogen production, capitalizing on the abundance of seawater and highlighting its significant role in future hydrogen applications. However, despite its scalability, major challenges persist—most notably, the development of high-performance, durable electrocatalysts capable of continuous operation while resisting the corrosive effects of chloride ions in seawater. In recent years, substantial progress has been achieved in the development of efficient electrocatalysts for seawater electrolysis. This review provides an in-depth analysis of recent developments in seawater hydrogen evolution catalysts, systematically discussing hydrogen production fundamentals, key reaction mechanisms, and persistent challenges. We compare the performance of noble metal and transition metal catalysts for seawater hydrogenation reactions and analyze their advantages and limitations. Subsequently, the focus is on exploring new ways to enhance catalytic performance through strategies such as improving catalyst conductivity, optimizing electronic effects, and enhancing catalyst synergies to facilitate efficient and stable progress in electrocatalyst design, and concludes with insights into future prospects in this field.

The intrinsic structural and photophysical properties of octahedral tris-(bidentate) transition metal polypyridyl complexes make them attractive DNA probes whose binding affinity and specificity for DNA can be greatly influenced by the Δ- and Λ-enantiomer forms. Strategies for chiral resolution include chiral precursors, fractional crystallisation with chiral salts as well as chromatographic methods. The present work details the optimisation of a chiral resolution process to facilitate the isolation of metal complex enantiomers via chiral stationary phase HPLC using a semi-preparative column. The scope of the study includes both Ru(II) and Os(II) polypyridyl enantiomers containing commonly encountered coordination environments as well as a range of more exotic ligand scaffolds that illustrate the generality of the method. Notably, this work also describes the ability to separate enantiomers of a mixture of two complexes prepared as a result of ‘ligand-scrambling‘ during synthesis.