The cover image is based on the Full Paper Preparation and characterization of magnetic hollow Fe3O4/P(GMA-EGDMA)-SO3H/Au-PPy recyclable catalyst for catalytic reduction of 4-nitrophenol by Na An et al., https://doi.org/10.1002/aoc.4739.

Research outputs in the combination of ferrocene-based small molecules, self-assembled monolayers and polymers with photo-responsive compounds and their potential applications have been enlightened in this review.

Three new Cu (II), Pd (II) and Ag (I) complexes with bidentate Schiff base ligand 2-[(4-chlorobenzylidene)amino] phenol were synthesized and characterized. The optimized geometry parameters were evaluated and the total energy of HOMO and LUMO, Mullikan atomic charges, dipole moment, orientation and nonlinear optical properties are discussed. The investigated complexes were tested for their antimicrobial and anticancer activities. The obtained results were confirmed by docking and DNA interaction studies.

A highly effective and stable hollow Fe₃O₄/P(GMA-EGDMA)-SO₃H/Au-PPy catalyst was prepared and characterized. The catalyst had excellent activity and exhibited reusability for the reduction reaction of 4-nitrophenol. In addition, the catalyst was reusable for at least 10 successive cycles.

Biological activity of ligand and its metal chelates.

The synthesis and structural characterizations of new Schiff base ligand HL and its metal (II) complexes 1–3 are reported. Complex 1 showed significant binding ability with DNA and complex 2 exhibited greater affinity with HSA. Consequently, complex 2 revealed the highest antimicrobial activity and complex 1 promising cytotoxicity against MCF-7 cancer cells.

A novel copper(II) Schiff-base complex immobilized on silica-coated nonmagnetic Fe₃O₄ was synthesized from acetylacetonate (acac) and 2-aminothiophenol (ATP). The catalytic activity of Fe₃O₄@SiO₂-acac-2ATP-Cu(II) nanoparticles was explored in three-component synthesis of pyrano[2,3-b]pyridine derivative under solvent-free conditions.

The adsorption of oxazole and isoxazole molecules over the pristine B₁₂N₁₂ nanocluster is investigated in terms of its geometric, the adsorption energies and the electronic properties using density functional theory calculations.

Copper (II), cobalt (III), iron (III), chromium (III) isothiosemicarbazone complexes (1–9) were synthesized and characterized using spectral and single-crystal X-ray diffraction analyses. The Fe (III) complex 8 manifests activity toward HeLa cells and does not destroy normal MDCK cells, which improves its properties in comparison with doxorubicin, applied in practice in medicine. Cr (III), Fe (III) and Co (III) complexes 6–9 manifest high antioxidant activity towards ABTS^•+ that exceeds 47–67 times the activity of Trolox.

• Cu(II) salen complex immobilized on graphene oxide nanosheets (Cu(II) salen@GO) was synthesized with 3-chloropropyltrimethoxysilan as a linker.
• Cu(II) salen@GO as an effective heterogeneous catalyst has been investigated for Pd-free Sonogashira coupling reaction in DMSO with high yield.
• The heterogeneous catalyst was as active as its homogeneous analogue and presented good recoverability and no significant loss in activity within successive runs.

The synthesis and characterization are reported of SIMes/PCy₃ mixed ligand-coordinated second-generation ruthenium catalysts, bearing various 3-alkyl-1-indenylidene ligands, denoted as RuCl₂(3-alkyl-1-indenylidene)(SIMes)(PCy₃), in which alkyl is isopropyl, tert-butyl or cyclohexyl. The catalytic activities of the complexes were evaluated in the olefin metathesis reaction.

Six diiron complexes were prepared by esterification or carbonyl substitution and structurally characterized using elemental analysis, infrared and NMR spectroscopies and X-ray crystallography. In addition, the electrochemical properties of the complexes were studied using cyclic voltammetry.

The complex [Cu(BIG)(bpy)]ClO₄⋅2H₂O was structurally characterized using single-crystal X-ray diffraction. It crystallizes in the monoclinic space group P2₁/n with four molecules per unit cell. An asymmetric unit of the complex contains complex molecule, perchlorate anion and two water molecules. The copper ion is coordinated to two nitrogen atoms (N1, N2) and carboxylate oxygen atom (O2) of the tridentate primary ligand BIGH and two nitrogen atoms (N4, N5) of bipyridine.

Electrocatalytic determination of ascorbic acid by using modified carbon paste electrode.

Design a novel and efficient system for Ibuprofen delivery based on Ugi-functionalized MIL-101.

Reusable boehmite nanoparticles–silica–NHSO₃H (BNPs-SiO₂@(CH₂)₃NHSO₃H) was found to be an efficient heterogeneous nanocatalyst for the selective oxidation of sulfides to sulfones. Excellent yields, easy and quick isolation of products, short reaction times and excellent selectivity are the main advantages of this reaction. The catalyst was characterized using various techniques.

Six silver(I) complexes have been synthesized with either thienylterpyridine or furylterpyridine as ligands. The ligands were seen to coordinate the silver(I) centres in both bidentate and monodentate modes. The silver(I) complexes have good antimicrobial activity and DNA binding properties.

The hydroformylation of olefins in supported room temperature liquid metals was developed firstly, and the supported Rh liquid metal catalysts (Rh SLMCs) showed unprecedented activity and high selectivity for the hydroformylation of olefins to aldehydes.

We synthesized [RuCl(p-cymene)(L)] complexes with N-arenesulfonly-o-phenylenediamine ligands and [RuCl₂(p-cymene)]₂. The complexes were used as catalysts in one-pot stepwise transfer hydrogenative reductive amination reactions of diverse aldehyde and amine derivatives in the presence of NaCOOH/HCOOH with aqueous media.

In vitro anticancer activity of new series of binuclear diphenyltin(IV)dithiocabamate complexes bearing diversified linkers has been investigated.

The potential application of an efficient, easily recoverable and reusable magnetically separable FeNi₃/KCC-1/APTPOSS nanoparticle-supported Cu(II) cyclam and salen complex catalyst for the synthesis of tetramethylquinoline-2,4-diamine was investigated. The catalyst was thoroughly characterized. The catalyst was utilized in the direct and selective chemical reaction of 1,3-dichlorovinamidinium⋅PF₆ with aniline for the synthesis of tetramethylquinoline-2,4-diamine. The recycled catalyst was analysed, the results showing only minor changes in the morphology after the reaction, thus confirming the robustness of the catalyst.

A novel catalyst is introduced based on the immobilization of DABCO on magnetic nanoparticles. The catalyst is characterized by various methods, including SEM, VSM, TGA and FT-IR spectroscopy. This catalyst is used for the synthesis of pyrano[3,2-c:5,6-c']dichromene-6,8-dione derivatives. Several starting materials containing electron-donating or electron-withdrawing functionalities were used, and all of them led to the desired products in high isolated yields (19 examples). The catalyst also showed very good reusability in the reaction.

Transition metal complexes containing a tridentate cefadroxil-based Schiff base (H₂L, 3) derived from the condensation of cefadroxil 1 with salicylaldehyde 2 were synthesized, characterized and screened for antibacterial activity.

3D channels generated in the supramolecular structure of complex due to 1,10-phenenthroline enhanced the NLO effect many times as compared with simple Ca-N-phthaloyl carboxylate complex.

Superparamagnetic Fe₃O₄/NH₂-Ag has been found as an effective carrier for the controlled loading and release of acyclovir at pH 7.4.

α-Diimine nickel catalyst Cat-1 bearing highly conjugated acenaphthylene backbone is synthesized. Cat-1 can produce polyethylene with both higher molecular weight and higher branch density than that of typical Brookhart catalyst B-Cat due to its twisted aniline moieties. The polyethylene prepared by Cat-1 show excellent mechanical properties and evidently improved elastic resilience as compared with the polymer prepared with B-Cat.

Four novel Pd(II) complexes were successfully utilized for biomolecular interaction studies. The complexes showed prominent cytotoxicity against various cell lines. These encouraging results are helpful in the different biological applications in future endeavor.

Cost-effective and atom-economic approach to C-heteroatom bond formation. Green and practical method for preparation of N-arylamines via magnetically separable and recyclable catalyst. Employing user-friendly arylating agent (aryl boronic acid).

Introducing a small amount of Co to N-doped carbon can significantly improve the catalytic activity for acetylene hydrochlorination due to the fact that the generated Co-N₄ has a stronger ability to adsorb and activate acetylene.

We have synthesized and characterized complexes 1-2, the spectroscopy methods showed that complexes 1 and 2 interaction with DNA in a partial intercalation mode and this result was further verified by docking study. The flow cytometry and morphological analysis showed that the two complexes exhibited apoptosis activity.

Activated carbon-supported cobalt molybdate (CoMoO₄/AC) composite was fabricated conveniently, aiming to create a novel heterogeneous catalyst for activation of peroxymonosulfate to degrade organic dyes. A rational mechanism is proposed based on a non-radical process and free radical process. The enhanced active sites were mainly ascribed to the synergistic effects between Co species and oxygen-containing functional groups (especially ketone groups) on the catalyst surface.

Fe₃O₄@SiO₂-PrNH₂-Fe³⁺ has been introduced as a recyclable nanocatalyst, which exhibits outstanding catalytic activity in synthesis of quinazoline derivatives as one of the most important nitrogen heterocycles.

Ru₃(CO)₁₂ picolinate complex as an efficient catalyst is screened for the oxidation of alcohols to carboxylic acids with 90% yield using basic water in open atmosphere.

Two 2-D and 3-D supramolecular complexes [M(L)₂] (NO₃)₂•2CH₃OH (M = Cu(1) and Co(2), L = 2-(4-imidazolyl)-4-methyl-1,2-quinazoline-N³-oxide), were synthesized and characterized. The spectroscopic data of complexes were compared with L. Both complexes were determined by X-ray single-crysta diffraction and display perfect octahedral geometries. In the crystal structures, complexes 1 and 2 form an infinite 1-D chain-like and 2-D, 3-D supramolecular frameworks. XPS and thermal stability of 2 was investigated. Electrochemical properties and antimicrobial activities of complexes were also studied.

A purine derivative-based colorimetric chemosensor (PHP) could be used to detect Cu²⁺ and S²⁻. The sensing mechanism of the PHP–Cu complex was confirmed using X-ray crystal structure analysis.

We report the synthesis of three new complexes of the natural flavonoid 5-hydroxyflavone (primuletin) and Al (III), Ga (III), In (III) with the general chemical formula of [M(C₁₅H₉O₃)₃] · nH₂O. Characterization of the complexes employed elemental, thermogravimetric analysis, molar conductance, FT-IR, UV–Vis, mass spectra, DFT calculations. Al (III) enhances, while Ga (III) and In (III) decrease the cytotoxicity of the ligand. As a means to investigate the mechanism underlying the cytotoxic effects, interactions with calf thymus DNA, serum albumin and transferrin were also carried out.

VO²⁺, Cu²⁺, Ni²⁺, Co²⁺, and Zn²⁺ Complexes of ethyl (E)-6-ethyl-2-((2-hydroxy benzylidene)amino)-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxylate were synthesized and characterized via different spectroscopic techniques and its fungicide activity against A. niger, A. Flavus, S. cereuisire and C. albican was examined by Well diffusion method.

A one-pot efficient catalytic synthesis of quinolines using new Ru(II) half-sandwich complexes under mild conditions is described. The synthesized complexes exhibit excellent catalytic activity towards the coupling of 2-amino alcohol with functionalized ketones and secondary alcohols in the optimal conditions and afforded the corresponding quinolines in isolated yields of up to 97% using 0.3 mol% of catalyst loading for 5 h.

Cu(II), Co(II), Mn(II), Cr(III) and Mn(III) complexes of a Schiff base ligand have been synthesized and characterized. Molecular docking and binding energy calculations of the ligand with H-ras (121p) indicated that the ligand is an efficient inhibitor of liver and breast cancer. The antitumor activities of the ligand and its complexes were evaluated against the two cancer cell lines HepG2 and MCF-7 and compared with that of the well-known anticancer drug cisplatin.

The ZnAl-LDH/eosin as recyclable catalyst in the presence of molecular oxygen and visible light used in the reaction of various aryl ketones and benzylamines afforded good yields of substituted pyridines at room temperature.

The novel (3,5-dimethyl-1H-pyrazol-1-yl)(morpholin-4-yl) methanethione ligand (L) and its copper(II) chelates have been prepared and investigated by several physico-chemical techniques. The molecular structures of the ligand as well as two Cu(II) complexes have been characterized by x-ray single crystal diffraction. The ligand (L) behaves as a bidentate NS chelating agent. The complexes displayed antimicrobial activity against various pathogenic bacteria and fungi higher than that of the free organic ligand.

Non-hydrocracking of diesel over a series of hierarchical HZSM-5 zeolites were desilicated by NaOH solution produced the gasoline, liquefied petroleum gas, dry gas and coke.

We have identified and developed a biocompatible drug delivery system (F@Tyr NPs), which could be used to delivery of chemotherapeutic agents such as CUR. Also, the MRI study demonstrated the effectiveness of Fe3O4 nanoparticles as contrast agent for the early detection of tumor as evidenced from the phantom images as well as higher T2 relaxivity.

Here, we have demonstrated A new expedient dual catalysis system with high efficiency to synthesize α-aminonitriles from benzyl alcohol.

Mesoporous silica nanoparticles used as controlled/targeted drug delivery systems; 2,3-disubstituted 1,4-naphthoquinone complex was used as biological active compound; The immobilized system was used as inhibitor of urease, as a potential new anti-ulcer drug.

An efficient method for the N-alkylation of poorly nucleophilic amines using ferric perchlorate immobilized on SiO₂ as a catalyst is described. Ferric perchlorate adsorbed on silica gel (Fe(ClO₄)₃/SiO₂) is an efficient and selective catalyst for the N-alkylation of aromatic amines with alcohols to provide alkylated amines.

A new organic–inorganic hybrid nanocomposite (TBA-Si₂W₁₈Mn₄@SAB) was synthesized by supporting quaternary ammonium salt of sandwich-type polyoxometalate (TBA-Si₂W₁₈Mn₄) on sodium-activated bentonite (SAB) for catalysing an oxidative desulfurization (ODS) process. The removal of the sulfur content of gasoline reached 97% at a temperature of 35°C after 1 h using 0.10 g of the prepared catalyst. The use of the TBA-Si₂W₁₈Mn₄@SAB/CH₃COOH/H₂O₂ oxidation system could be a convenient strategy for reducing the sulfur content of gasoline fuel under moderate reaction conditions.

Zeolite Y-Palladium nanoparticles were prepared by using ultrasonic irradiation and used as a catalyst in Suzuki-Miyaura reactions. This catalyst has high performance in Suzuki-Miyaura coupling of aryl halides (Ar-X, X = I, Br, Cl, F) with phenylboronic acid. The advantages of using this catalyst are green solvent, short reaction time, high yields, ligandless and recyclable.

Porous BiOBr microspheres with improved photocatalytic activity have been successfully synthesized through an ethylene glycol-assisted solvothermal method using reactive ionic liquids as templates and reactants during the synthetic process.

High reactivity of Pd/Fe nanoparticles is obtained through reacting passivation layers on the particle surface and free iron ions in aqueous solution with biodegradable iminodisuccinic acid, which can be used to very effectively dechlorinate 2,4-dichlorophenoxyacetic acid.

Growth inhibition effect on photosynthetic microbes by copper-based MOFs that have been synthesized using a facile hydrothermal method was evaluated. Its show promising inhibition efficiency and have influence on algal physiological characteristics. The inhibition mechanism on algae by Cu-based MOFs was proposed.

A novel bis-Schiff base ligand, 1,2-bis(2-vinylphenoxy)ethane-4,6-diaminopyrimidine-2-thiol, was prepared. Coordination compounds of this Schiff base with transition metal cations Cd(II), Zn(II), Ni(II), Co(II), Mn(II), Cu(II) and Fe(III) were synthesized and characterized. Their biological activities were experimentally determined and confirmed using theoretical molecular docking.

A series of silicon-bridged diphosphine cobalt complexes were synthesized and characterized, which present selectivity towards ethylene dimerization, combined with DMAO/AlEt₃. Single-crystal X-ray diffraction data indicated a monomeric structure with κ² coordination of the silicon-bridged diphosphine ligand to the cobalt center. Cobalt complex C1 exhibited moderate catalytic activity of 2.3 × 10⁵ g (mol_Co)⁻¹ h⁻¹, with 100% selectivity towards C₄ (87% 1-C₄ in the C₄ fraction).

A mild, simple and efficient procedure for the preparation of barbituric acid and pyrano[2,3-d]pyrimidine derivatives in aqueous media is described using 4-(4-propylpiperazine-1-yl)butane-1-sulfonic acid-modified silica-coated magnetic nanoparticles as a novel and reusable catalyst. The catalyst was easily isolated from the reaction mixture by magnetic decantation and reused at least eight times without significant degradation in activity.

Novel Mn (II), Co (II), Cr (III) and Cu (II) complexes have been synthesized with azopyrazolone ligand, HL. Their structures were assigned depending on the elemental, thermal and spectral analyses, as well as conductivity and magnetic moment measurements. The XRD results uniquely confirmed the crystalline nature and nano-sized particles of Cu (II) complex. The tested compounds showed a reasonable antibacterial activity and weak antitumor efficacy. The in vitro results were confirmed by the in silico molecular docking analysis (docking server).

This study reported thefacile fabrication of novel mixed phase calcium ferrite and zirconia nanocomposite. Coexistence of calciumferrite and zirconia nanoparticles enhanced the adsorptive performance of the composite. The RSMoptimization revealed maximum MO dye removal of 99.11% at optimum experimental conditions.

A sustainable catalyst for biaryl synthesis through various coupling reactions has been reported. The catalyst is the first example of Pd(0)-β- CD complex without any modifications.

Reported are the synthesis and characterization of a new nanorod tin(IV) complex with marked inhibition towards some types of bacteria and cytotoxicity against two human cancer cell lines.

The excited-state characteristics of a series of triimine ligands as well as their corresponding Re(I) complexes were investigated experimentally and theoretically.

Design of molecular bracket containing cymantrenyl and rhodamine fragments for selective metal ion sensing, light responsive, imaging and molecular switching behavior.

A new potassium-based CP with zigzag K···K metallophilic interactions has been synthesized and structurally characterized. A widespread hydrogen bonding network in 3D structure of it was observed. The effects of concentration, ultrasonic irradiation and type of the solvents on morphology and thermal behavior of it was investigated.

Rare homo- and hetero-polynuclear transition metal(II) complexes, [{Cu(L¹)}₂] (1) and [Cu(L²)Ni₂(CH₃OH)₂] (2), were prepared and characterized. Complex 1 possesses an uncommon dinuclear structure bonded by two alkoxy bridges. Complex 2 exhibits an unexpected trinuclear heterobimetallic structure from two chelating (L²)³⁻ units in crossover mode. Fluorescence behaviors of 1 and 2 were investigated, and electrochemical experiments revealed that electrolytic redox reactions of 1 are irreversible processes.

A schematic illustration of the synthesis process of nanocomposite.

Six lanthanide(III) complexes with the 2-(naphthalen-1-yl)-1H-imidazo[4,5-f]-1,10-phenanthroline ligand have been synthesized and characterized. Low IC₅₀ values of these complexes were measured with three human cancer cell lines. Complex 5 could induce BEL-7404 cancer cell apoptosis via the extrinsic pathway with high expression of caspase-8, resulting in caspase-3 activation. Furthermore, complex 5 could significantly suppress BEL-7404 cell proliferation via induced apoptosis with G2/M phase cell cycle.

Preparation and characterization of palladium nanoparticles dispersed on the surface of 2-amino pyrimidine functionalized-cellulose nanocrystals as a novel, efficient and reusable heterogeneous nanocatalysts (CNC-AMPD-Pd) performed and then the prepared nanocatalyst applied successfully for the Pechmann reactions of different substituted phenols and ethyl acetoacetate to synthesize of various coumarin derivatives. The recovered catalyst reused in four successive runs with only a slight loss of activity.

The first supported aqueous-phase catalyst for the hydrogenation of nitriles is revealed. The catalyst prepared from Pd(PhCN)₂Cl₂, water soluble ligand 2,2'-biquinoline-4,4'-dicarboxylic acid dipotassium salt and mesoporous silica is a highly efficient catalyst for the selective formation of secondary or tertiary amines respectively from aromatic or aliphatic nitriles. The catalytic system is stable and can be recycled and reused without loss of activity and selectivity. The catalyst is easily prepared and is highly active under moderate operational conditions.

Mn-Schiff base complex has been covalently attached to the surface of MCM-4, characterized, and used as a highly efficient, heterogeneous and recyclable catalyst for the oxidation of a wide range of alkenes with hydrogen peroxide.

Using a simple grinding method, we have successfully fabricated g-C₃N₄/MIL-53(Fe) composites, and they exhibited higher activities for H₂ evolution via efficient separation and transfer of photogenerated electron–hole pairs as well as exposing more active sites.