A facile, gram-scale synthesis of high-quality zinc selenide quantum dots using selenourea as the selenium source at a relatively low temperature is reported. The synthesized dots exhibit intense green emission due to donor-acceptor pair recombination of photogenerated carriers. ZnSe QDs show significant potential as nanoscale flourescent labels for biomedical imaging.

We, herein, report a facile green synthetic route for the gram-scale synthesis of high-quality thiol-derivatized zinc selenide quantum dots (QDs) using selenourea as the source of selenium at a relatively low temperature. The one-pot synthesis of colloidal dots has been achieved by selenizing zinc (II) acetate in a non-coordinating solvent medium. The structural, microstructural, optical, thermal, textural and electronic properties of the as-synthesized monodisperse ZnSe dots have been investigated in detail. We attribute the observed green emission from the dots to the donor-acceptor pair (DAP) recombination of photoexcited charge carriers. All the findings of the investigation indicate that ZnSe QDs hold great promise as a nanoscale emissive probe to unveil cellular dynamics beyond the capabilities of conventional imaging techniques.

Different metal complexes through mixing N ¹,N ³-bis(4-phenylthiazol-2-yl)malonamide with Cr(III), Fe(III), Cu(II), and Zn(II) nitrates in a 1:2 ratio in excellent yield and spectral analysis investigation were synthesized and showed change of SEM of surface of ligand and Cu(II) complex. Furthermore, antimicrobial activities and docking simulation also showed electrochemical behavior and Cr complex acts as a conducting material that can be used in supercapacitor. Additionally, computational investigation was made with basis set DFT/B3LYP/LANL2DZ to find the theoretical stability and FMO orbitals and evaluate physical parameter.

Novel metal complexes were synthesized by mixing N ¹ ,N ³ -bis(4-phenylthiazol-2-yl)malonamide with Cr (III), Fe (III), Cu (II), and Zn (II) nitrates in a 1:2 (L: metal) ratio. Through the use of several analytical and spectral methods, the structures of all compounds were determined. It was determined that the novel ligand functions through O₂N₂ sites as a neutral tetradentate. The thermal stability and the thermodynamic parameters were evaluated using thermal gravimetric analysis and the Coats-Redfern equations. Powder X-ray diffraction investigation revealed the type of unit cell and the degree of crystallinity. The complexes were further tested for their antibacterial efficacy, with molecular simulation using several proteins demonstrating the strongest action against a range of pathogens. Optimization for all compounds were made through the basis set DFT/B3LYP/LANL2DZ to find the theoretical stability, FMO orbitals, energy gaps, molecular electrostatic potentials (MEPs), and evaluate physical parameter. Here, the electrochemical properties of the metal complexes were investigated using cyclic voltammetry and electrochemical impedance spectroscopy methods. Additionally, [Cr₂(L)(NO₃)₄(H₂O)₄](NO₃)₂ complex has been authorized that has high electrocatalytic characteristics, making it attractive for use in supercapacitor applications.

This review summarizes the application of β-cyclodextrin-based catalyst systems in click reactions. Surprisingly, there was no review on using the β-cyclodextrin system as a green catalyst for synthesizing 1,2,3-triazoles, and we debated it for the first time. Different types of catalysts based on cyclodextrins such as native β-cyclodextrin, Cu (II)–β-cyclodextrin complex, Cu (II)–β-cyclodextrin nanoparticles, and β-CD-heterogeneous have been studied that showed β-CD an ideal candidate for using it in click reactions synthesis of 1,2,3‑triazoles.

A significant challenge for scientists today is to design green and eco-friendly catalysts based on green chemistry with high catalytic performance and recycling properties. Many studies have aimed to address environmental issues by developing green chemical processes and catalysts that reduce the production of harmful substances. β-Cyclodextrin (β-CD), a class of cyclic oligomers, has garnered considerable attention in recent decades. It has been utilized as a green alternative catalyst in various organic conversions, demonstrating satisfactory catalytic activity and improved efficiency of organic reactions. The availability, non-toxicity, low cost, renewability, and high performance in organic transformations are several benefits of cyclodextrins that have attracted interest from research groups worldwide. The click reaction is well-known in green chemistry for its high selectivity and efficiency in producing 1,2,3-triazoles with significant medicinal activities. This reaction involves aryl/alkyl halides, alkynes, and NaN₃ under ambient conditions to generate necessary scaffolds called 1,2,3-triazoles. Therefore, finding green approaches for synthesizing 1,2,3-triazoles is of great interest. In recent decades, significant advancements have been made in developing metal-catalyzed click reactions to synthesize 1,2,3-triazole derivatives. Carolyn Bertozzi, Morten Meldal, and Barry Sharpless were awarded the Nobel Prize in Chemistry in 2022 for their contributions to the foundations of click and bio-orthogonal chemistry. In transition, metal-catalyzed click reactions, using modified β-CD derivatives as catalysts is particularly advantageous because of their valuable catalytic properties and their ability to form inclusion complexes with different metals. This review focuses on the catalyzed click reaction using β-CD-based catalysts to prepare triazoles. Using biodegradable β-CD has made the method safe, sustainable, and eco-friendly. The click reaction has provided access to various 1,2,3-triazoles essential in pharmaceutical products and exhibits diverse biological activities. The specific purpose of this review is to summarize the application of β-CD-based catalyst systems in click reactions.

Two novel phosphoramide containing thiazole derivatives with the name of bis(5-amino-1,3,4-thiadiazol-2-yl) phenylphosphonotrithioate (C1) and O, O-diethyl (5-((diethoxyphosphorothioyl) thio)-1,3,4-thiadiazol-2yl) phosphoramidothioate (C2) as corrosion inhibition were synthesized and identified by ¹H NMR, ¹³C NMR, ³¹P NMR, IR, and mass spectroscopies. The electrochemical behavior of mild steel (MS) in hydrochloric acid 1-M (HCl) solution was perused in the absence and presence of C1 and C2. To determine corrosion inhibition of phosphoramide compounds, scanning electron microscopy (SEM), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) were used. The EIS results show that the charge transfer resistance increases with the addition of inhibitors to the hydrochloric acid solution. The most inhibitor efficiency was 89%, which demonstrated the appropriate anti-corrosion property of C1. EIS results show better charge transfer resistance on the surface of MS at increased inhibitor concentrations. The PDP analysis showed that C1 and C2 are mixed-type inhibitors. The PDP examination appeared that C1 and C2 are mixed-type inhibitors. To way better get the comes about of corrosion inhibition and structure of target compounds, the highest occupied molecular orbital (HOMO) and least unoccupied molecular orbital (LUMO) energies, hardness, dipole moment, and electrophilicity index of synthesized compounds were explored computationally using the density functional theory (DFT) strategy. The hypothetical comes about in great understanding with the exploratory information.