Recyclable copper catalyst supported over ceria for acceptorless dehydrogenative synthesis of quinolines.

This study presents a highly efficient and cost-effective Cu/CeO2 catalyst for the acceptorless dehydrogenative coupling (ADC) of o-aminobenzyl alcohols and secondary alcohols to synthesize quinolines. The catalyst demonstrated over 90% yield in quinoline production under mild conditions, exhibiting excellent tolerance to various functional groups. The Cu/CeO2 catalyst, synthesized via a co-precipitation method, was thoroughly characterized through various techniques like PXRD, XPS, and AC-STEM.

Two-Dimensional Porphyrin-Based Covalent Organic Frameworks/g-CN Composites as High-Performance Supercapacitor.

Covalent organic frameworks (COFs) with high porosity and redox-active properties have been advanced as electrode materials for energy storage systems, although poor electron conductivity and inaccessibility of active pore sites hinder their performance as electrode material for supercapacitor application. Thus, incorporation of a COF with various conductive materials can be an effective strategy to improve their electrochemical performances for supercapacitors. Herein, we report the synthesis of POR-COF@g-CN composites by fabricating a porphyrin-based COF on g-CN via in situ solvothermal conditions.

Blazing Carbon Dots: Unfolding its Luminescence Mechanism to Photoinduced Biomedical Applications.

Carbon dots (CDs) are carbon-based nanomaterials that have garnered immense attention owing to their exceptional photophysical and optoelectronic properties. They have been employed extensively for biomedical imaging and phototherapy due to their superb water dispersibility, low toxicity, outstanding biocompatibility, and exceptional tissue permeability. This review summarizes the structural classification of CDs, the classification of CDs according to precursor sources, and the luminescence mechanism of CDs.

A lignin-derived carbon dot-upgraded bacterial cellulose membrane as an all-in-one interfacial evaporator for solar-driven water purification.

Solar-driven interfacial evaporation has emerged as an efficient approach for wastewater treatment and seawater desalination. New trends demand adaptive technology to develop photothermal membranes with multifunctional features. Herein, we report a robust multi-purpose near-infrared (NIR)-active hydrogel composite (-BC@N-LCD) from broad-spectrum active nitrogen-doped lignin-derived carbon dots (N-LCDs) covalently cross-linked with a bacterial cellulose (BC) matrix.

Diverse Coordination Modes and Bidirectional Noninnocence of Pyridyl-β-diketonate on Ruthenium Platforms as a Function of Coligands.

The article demonstrated diverse binding modes of deprotonated 1,3-di(2-pyridinyl)-1,3-propanedione (HL) (κ-[O,O], κ-[N,O], and μ-bis-κ-[N,O]) on selective ruthenium platforms: Ru(acac) (dimeric []ClO), Ru(bpy) (monomeric []ClO), Ru(pap) (isomeric monomeric []ClO/[]ClO, dimeric [](ClO)), and Ru(PPh)(CO) (monomeric , isomeric dimeric []ClO/[]ClO) (acac = acetylacetonate, bpy = 2,2-bipyridine, pap = 2-phenylazopyridine). Structural authentication of the complexes revealed (i) diverse binding mode of L including its unprecedented bridging mode in []ClO, (ii) varying degrees of nonplanarity of L, and (iii) development of 1D polymeric chains or dimeric/tetrameric forms via intermolecular π-π interactions. The preferential binding feature of L in the complexes could also be corroborated by their calculated relative energies.

Highlights in Interface of Wastewater Treatment by Utilizing Metal Organic Frameworks: Purification and Adsorption Kinetics.

Polluted water has become a concern for the scientific community as it causes many severe threats to living beings. Detection or removal of contaminants present in wastewater and attaining purity of water that can be used for various purposes are a primary responsibility. Different treatment methods have already been used for the purification of sewage.

growth of a redox-active metal-organic framework on electrospun carbon nanofibers as a free-standing electrode for flexible energy storage devices.

The rational construction of free-standing and flexible electrodes for application in electrochemical energy storage devices and next-generation supercapacitors is an emerging research focus. Herein, we prepared a redox-active ferrocene dicarboxylic acid (Fc)-based nickel metal-organic framework (MOF) on electrospun carbon nanofibers (NiFc-MOF@CNFs) an approach. This approach avoided the aggregation of the MOF.

Exploring the antimicrobial potential of isoniazid loaded Cu-based metal-organic frameworks as a novel strategy for effective killing of .

Tuberculosis (TB) remains one of the most infectious pathogens with the highest human mortality and morbidity. Biofilm formation during () infection is responsible for bacterial growth, communication, and, most essentially, increased resistance/tolerance to antibiotics leading to higher bacterial persistence. Thus, biofilm growth is presently considered a key virulence factor in the case of chronic disease.

Phosphorization Engineering on a MOF-Derived Metal Phosphide Heterostructure (Cu/CuP@NC) as an Electrode for Enhanced Supercapacitor Performance.

A highly conductive and rationally constructed metal-organic framework (MOF)-derived metal phosphide with a carbonaceous nanostructure is a meticulous architecture toward the development of electrode materials for energy storage devices. Herein, we report a facile strategy to design and construct a new three-dimensional (3D) via a solvent diffusion method at ambient temperature, which was authenticated by a single-crystal X-ray diffraction study, revealing a novel topology of (2,4,7)-connected three-nodal net named . Nevertheless, the poor conductivity of pristine MOFs is a major bottleneck hindering their capacitance.

Heterostructures of MXenes and transition metal oxides for supercapacitors: an overview.

MXenes are a large family of two dimensional (2D) materials with high conductivity, redox activity and compositional diversity that have become front-runners in the materials world for a diverse range of energy storage applications. High-performing supercapacitors require electrode materials with high charge storage capabilities, excellent electrical conductivity for fast electron transfer, and the ability of fast charging/discharging with good cyclability. While MXenes show many of these properties, their energy storage capability is limited by a narrow electrochemically stable potential window due to irreversible oxidation under anodic potentials.

Multifaceted Carbon Dots: toward pH-Responsive Delivery of 5-Fluorouracil for In Vitro Antiproliferative Activity.

The synthesis of smart hybrid material to assimilate diagnosis and treatment is crucial in nanomedicine. Herein, we present a simple and facile method to synthesize multitalented blue-emissive nitrogen-doped carbon dots . The as-prepared carbon dots show enhanced biocompatibility, small size, high fluorescence, and high quantum yield.

Upcycling rust and plastic waste into an Fe MOF for effective energy storage applications: transformation of trash to treasure.

The upcycling of waste into valuable chemicals has gained significant attention in recent years as a way to reduce waste and promote the circular economy. The transition to a circular economy that includes waste upcycling is crucial for addressing the global challenge of resource depletion and waste management. To that end, an Fe-based metal-organic framework material () has been synthesized completely the utilization of waste materials.

Cu-Metal Organic Framework Derived Multilevel Hierarchy (Cu/CuO@NC) as a Bifunctional Electrode for High-Performance Supercapacitors and Oxygen Evolution Reaction.

The development of a MOFs-derived multilevel hierarchy in a single step still remains a challenging task. Herein, we have synthesized novel Cu-MOF via a slow diffusion method at ambient temperature and further utilized it as a precursor source for MOF-derived multilevel hierarchy (Cu/CuO@NC, = 1 and 2). This studies suggest that the organic ligands served as a source of an N-doped carbon matrix encapsulated with metal oxide nanoparticles which were confirmed by various characterization techniques; further BET analysis reveals a surface area of 178.

Improved photovoltaic performance of Pb-free AgBiI based photovoltaics.

Hybrid perovskites based on bismuth are good candidates for developing lead-free and air-stable photovoltaics, but they have historically been constrained by poor surface morphologies and large band-gap energies. Monovalent silver cations are incorporated into iodobismuthates as part of a novel materials processing method to fabricate improved bismuth-based thin-film photovoltaic absorbers. However, a number of fundamental characteristics prevented them from achieving better efficiency.

Effect of Electrolytic Cations on a 3D Cd-MOF for Supercapacitive Electrodes.

A cadmium-based metal-organic framework () is synthesized in a facile manner at ambient temperature by an easy slow diffusion process. The three-dimensional (3D) structure of is authenticated by single-crystal X-ray diffraction studies and exhibits a cuboid-shaped morphology with an average edge length of ∼1.13 μm.

Fluorene-Chloroquine Hybrids: Synthesis, in vitro Antiplasmodial Activity, and Inhibition of Heme Detoxification Machinery of Plasmodium falciparum.

Fluorene-chloroquine hybrids have been identified as a new promising class of antiplasmodial agents. The most active compound 9 d exhibited good in vitro antiplasmodial activity against a chloroquine-sensitive NF54 strain of the human malaria parasite Plasmodium falciparum with an IC value of 139 nM. UV-visible absorption, FTIR spectral and H NMR titration data corroborated the binding of 9 d to monomeric and μ-oxodimeric heme as well as inhibition of β-hematin formation, which collectively supported the inhibition of heme detoxification machinery in P.

Doxycycline detection and degradation in aqueous media simultaneous synthesis of Fe-N@carbon dots and FeO-carbon dot hybrid nanoparticles: a one arrow two hawk approach.

The overuse of antibiotics in recent years presents a huge challenge to society for their removal from the environment. The prolonged presence of antibiotics as environmental pollutants results in the emergence of drug-resistant bacteria faster than new antibiotics to treat diseases they cause. Therefore, a rapid, sensitive, and cost-effective method is urgently required to detect and degrade antibiotics.

Recent Development of Morphology-Controlled Hybrid Nanomaterials for Triboelectric Nanogenerator: A Review.

Being cognizant of modern electronic devices, the scientists are continuing to investigate renewable green-energy resources for a decade. Amid different energy harvesting systems, the triboelectric nanogenerators (TENGs) have been found to be the most promising mechanical harvesting technology and have drawn attention to generate electrical energy. Thanks to its instant output power, choice to opt for wide-ranging materials, low maintenance cost, easy fabrication process and environmentally friendly nature.

Diruthenium and triruthenium compounds of the potential redox active non-chelated η-N,η-N-benzothiadiazole bridge.

In the present study, a series of non-chelated BTD (2,1,3-benzothiadiazole)-bridged diruthenium(II) ([{(CHCN)(acac)Ru}(μ-BTD)] 1, [{CHCN(acac)Ru}(μ-BTD){Ru(acac)(η-N-BTD)}] 2, [{(η-N-BTD)(acac)Ru}(μ-BTD)] 3), and triruthenium ([{(acac)Ru}(μ-BTD)(η-N-BTD)] 4) complexes with varying ratios of η-N and μ-bis-η-N,η-N modes of BTD were studied. Complexes 1-4 ( = 0) were obtained the one-pot reaction of electron-rich Ru(acac)(CHCN) and electron-deficient BTD in refluxing acetone. The relatively low Ru(II)/Ru(III) potential of 1-4 (0.

Thiazolothiazole based donor-π-acceptor fluorophore: Protonation/deprotonation triggered molecular switch, sensing and bio-imaging applications.

Stimuli modulated photophysical properties of a new asymmetric multifunctional molecular probe, 2-(pyren-1-yl)-5-(pyridin-4-yl)thiazolo [5,4-d]thiazole (PYTZ-P) bearing electron-rich pyrene and electron-deficient pyridine units linked through a π-conjugated thiazolo [5,4-d]thiazole (TTz) bridge are reported. Its sensitivity towards protons (TFA) in solution is manifested in the form of bathochromically shifted emission that spreads all over the visible region, and is related to the increased acceptor strength of pyridine upon protonation and subsequent enhanced magnitude of intramolecular charge-transfer in the probe. Similar modulation of the luminescence behaviour of the probe was also observed in the solid state.

Photoactivatable carbon dots as a label-free fluorescent probe for picric acid detection and light-induced bacterial inactivation.

The zero-dimensional carbon nanostructure known as carbon dots showed attractive attributes such as multicolour emission, very high quantum yield, up-conversion, very good aqueous solubility, eco-friendliness, and excellent biocompatibility. These outstanding features of the carbon dots have raised significant interest among the research community worldwide. In the current work, water-soluble nitrogen, silver, and gold co-doped bimetallic carbon dots (BCDs) were prepared using the one-pot hydrothermal method with citric acid as a sole carbon source.

Cancer-Targeted Chitosan-Biotin-Conjugated Mesoporous Silica Nanoparticles as Carriers of Zinc Complexes to Achieve Enhanced Chemotherapy and .

Despite being the most common component of numerous metalloenzymes in the human body, zinc complexes are still under-rated as chemotherapeutic agents. Herein, the present study opens up a key route toward enhanced chemotherapy with the help of two Zn complexes (ZnMBC) synthesized alongside Mannich base ligands to upsurge biological potency. Further, well-established mesoporous silica nanoparticles (MSNs) have been chosen as carriers of the titled metallodrugs in order to achieve anticancer drug delivery.

A fluorene based probe: Synthesis and "turn-on" water sensitivity of the in-situ formed Cu complex: Application in bio-imaging.

A new fluorene based probe (FTH) has been evaluated for its photo-physical properties in solution as well as in the aggregated state/viscous environment. Addition of a poor solvent (water) to the solution of the probe in a good (acetonitrile) solvent significantly enhanced the otherwise weak emission due to aggregation induced emission (AIE). The emission enhancement is also related to the increase in viscosity of the solution, leading to the restricted intramolecular rotation of the peripheral (phenyl) groups.

Construction of a Cu-Based Metal-Organic Framework by Employing a Mixed-Ligand Strategy and Its Facile Conversion into Nanofibrous CuO for Electrochemical Energy Storage Applications.

Recently, metal-organic frameworks (MOFs) have been widely employed as a sacrificial template for the construction of nanostructured materials for a range of applications including energy storage. Herein, we report a facile mixed-ligand strategy for the synthesis of a Cu-MOF, [Cu(Azopy)(BTTC)(HO)·2HO] (where BTTC = 1,2,4,5-benzenetetracarboxylic acid and Azopy = 4,4'-azopyridine), via a slow-diffusion method at room temperature. X-ray analysis authenticates the two-dimensional (2D)-layered framework of Cu-MOF.