Muhammad N Tahir

• PhD
• Associate Professor at King Fahd University of Petroleum and Minerals

Aqueous organic polymeric electrolytes have garnered substantial interest in the development of redox flow batteries (RFBs) because of their significant potential to enhance energy storage capacity and scalability. These materials provide several advantages, including high water solubility, excellent ionic conductivity, robust chemical resistance,...

Two new mononuclear heteroleptic complexes (a) Cu (II) complex using 3,5‐dihydroxybenzoic acid and tetramethylethylenediamine and (b) Ni (II) complex with benzoic acid and tetramethylethylenediamine were synthesized and characterized spectroscopically. Moreover, the compounds were characterized by single‐crystal X‐ray diffraction (SC‐XRD), which sh...

Pursuing green, sustainable, and efficient energy storage devices has accelerated the development of techno-economically viable and environmentally benign activated carbons (ACs) derived from natural waste resources. Traditionally, chemical activation has been the favored approach to produce highly porous carbons; however, the environmental hazards...

The current research details the engineering of a zeolitic imidazolate framework (ZIF-8) with iron (Fe) for electrocatalytic performance in energy generation using oxygen evolution reaction (OER). The prepared materials were characterized using analytical techniques such as powdered X-ray diffraction (XRD), scanning electron microscopy (SEM) and en...

Graphitic carbon nitride (g-C₃N₄) is a metal-free semiconductor material with highly promising photocatalytic abilities owing to its unique structural, electronic, and optical characteristics. Herein, the solvothermal synthesis of C3N4 as...

A new class of donor flexible nitrogen ligands, namely pyridylidene sulfonamides (PYSAs; N-(1-benzylpyridin-4(1H)-ylidene)benzene-sulfonamide, N-(1-benzylpyridin-4(1H)-ylidene)thiophene-2-sulfonamide, N-(1-benzylpyridin-4(1H)-ylidene)pyridine-2-sulfonamide and N-(1-benzylpyridin-4(1H)-ylidene)-8-quinoline-sulfonamide), were prepared from 4-amino-1-...

The reaction of [Formula: see text]-methylbenzaldehyde and 5,5-dimethyl-1,3-cyclohexanedione with the addition of HCl yielded 3,3,6,6-tetramethyl-9-([Formula: see text]-tolyl)-3,4,5,6,7,9-hexahydro-1[Formula: see text]-xanthene-1,8(2[Formula: see text]-dione (TTHD). X-ray diffraction method was used for verification of the crystal structure. Supram...

A series of mixed ligand complexes of Pd(II) and Pt(II) of 1-cyclohexyl-3-phenylthiourea and diamine ligands {2,2'-bipyridyl (Bipy) and 1,10-phenanthroline (Phen)} were prepared and characterized by FT-IR, NMR spectroscopy, molar conductivity. Density functional theory (DFT) calculations and biological activity were carried out on the prepared comp...

The conversion of 5-hydroxymethylfurfural (HMF) into valuable chemicals, such as 2,5-furandicarboxylic acid (FDCA), is pivotal for sustainable chemical production, offering a renewable pathway to biodegradable plastics and high-value organic compounds. This pioneering study explores the synthesis of FeNi nanostructures via aerosol-assisted chemical...

The title compound, C17H25N3O3S2, hereafter 1, has been prepared and fully characterized by FTIR, 1H NMR and 13C NMR. Its crystal structure was determined by single-crystal X-ray diffraction. The crystal packing is stabilized by weak C-H···O and C-H···π interactions. The CLP-Pixel method was used to quantify the energetically significant molecular...

Electrochemical energy conversion and storage technologies play a crucial role in ensuring a sustainable energy future. In these regards, nanostructured carbon-based materials (NCMs) are very critical in the development of novel energy technologies and devices. NCMs include CNTs, graphene, fullerene, and ordered mesoporous carbon materials, which e...

Treatment of NiCl2.6H2O with two equivalents of 1,2-bis(diphenylphosphino)ethane (dppe) in MeOH/CH2Cl2 afforded [NiCl(dppe)2]Cl.CH2Cl2 in 89% yield. The crystal structure has been determined by single crystal XRD, showing a slightly distorted square pyramidal geometry around nickel with the chloride ligand occupying the apical site. The basal plane...

Drilling fluids (water based or oil based) are used to drill wells. Water based drilling fluid utilize fresh water, seawater, or brines. Selection of optimum chemicals are critical to maximize well’s productivity and reduces drilling cost without damaging equipment or the surrounding environment. Drilling fluids need to be evaluated prior to drilli...

Gas migration through cemented casings may introduce a risk for wellbore integrity if cement formulations do not contain additives such as polymer latex. Polymer latex have been used to help reduce the fluid loss to minimize gas migration, improve wellbore integrity, and aid in the mixing ability of cement slurries. Many theories and mechanisms hav...

We studied the three-component condensation of 2-chloraldehyde, acetophenone, and thiourea in the presence of HCl and as a result, a new compound was obtained - 4,5-bis(2-chlorophenyl)-8a-phenylhexahydropyrimido[4,5-d]pyrimidine-2,7(1H,3H)-dithione (CPPD). The structure of the newly synthesized compound was confirmed by the X-ray diffraction method...

Redox flow batteries (RFBs) can potentially revolutionize large-scale energy-storage technologies for both conventional (fossil fuel) and modern (renewable) electric power systems. This has stimulated the development of new methods for reducing the costs of such batteries by lowering material costs and increasing the energy density. Driven by the a...

The synthesis and XRD characterization of two new 1,4-benzoxazine derivatives (3a-5a) namely ethyl‐6‐nitro‐3a‐(p‐tolylamino)‐1,2,3,3a‐tetrahydrobenzo[b]cyclopenta[e][1,4]oxa-zine‐9a(9H)‐carboxylate (3a) and methyl-6,10b-dimethyl-5a,6,10b,11-tetrahydrobenzo[5,6][1,4]oxazino[2,3-b]indole-2-carboxylate (5a) are reported herein. In both compounds it is...

1,2-Benzothiazines are bioactive compounds with diverse pharmacological properties. We report here the synthesis of a series of dimers containing 1,2-benzothiazine scaffolds as potential pharmacophores. The characterization of compounds was done using analytical techniques such as FT-IR, ¹H NMR, and elemental analyses. The molecular structures of t...

Synthesis, characterization and structural relevance of four new copper carboxylate complexes (1–4) has been presented here. The complexes have been synthesized by direct treatment of the substituted phenyl acetate and pyridine ligands in aqueous medium. The complexes were stable indefinitely with excellent yields and were characterized using spect...

The current work describes the synthesis of a new Pb(II) complex Pb[ROMLIP]2 with a thiourea derivative. The synthesized complex was characterized by FT-IR, elemental analysis, and single crystal X-ray diffraction (XRD) analysis. The spectroscopic data confirmed that the thiourea ligands coordinate with the Pb center in a way that forms a dimeric s...

Under ultrasound irradiation in an ethanol solvent, a new coordination complex of Cu(II) was successfully synthesized within a 10-min timeframe through the treatment of an imidazole-based ligand (PDI) with a copper-containing salt. The formation of the complex was verified through elemental (CHN) analysis and FT-IR spectroscopy. Additionally, the s...

Benzocaine is known for its antibacterial, anticancer, antitumor, and antifungal properties. Herein, a series of three new Schiff bases is synthesized by reacting benzocaine with salicylaldehyde (E4AS), 2,3-dihydroxybenzaldehyde (E4ADH), and 5-chlorosalicylaldehyde (E4ACl). These benzocaine-based Schiff bases were characterized by a variety of spec...

The current work is about the modification of primary amine functionalized drugs, pyrimethamine and 4-amino-N-(2,3-dihydrothiazol-2-yl)benzenesulfonamide, via condensation reaction with 2-hydroxy-1-naphthaldehyde to produce new organic zwitterionic compounds (E)-1-(((4-(N-(2,3-dihydrothiazol-2-yl)sulfamoyl)phenyl)iminio)methyl)naphthalen-2-olate (D...

Synthesis, structural characterization and preliminary biological relevance of four new copper carboxylate complexes ( 1 - 4 ) has been presented here. The complexes have been synthesized by direct treatment of the substituted phenyl acetate and pyridine ligands in aqueous medium. The complexes were stable indefinitely with excellent yield and were...

A novel coordination CuCl2(L)2 complex was synthesized by complexation of the 2-thiophenimidazoline ligand with CuCl2.2H2O in less than 10 min. The synthesis was done using ultrasound irradiation in an ethanol solvent. The complexation was confirmed using CHN and FT-IR analysis and linked to the theoretical IR and DFT calculations. The single-cryst...

Owing to the broad applications of quaternary ammonium salts (QAS), we present the synthesis of benzimidazolium-based analogues with variation in the alkyl and alkoxy group at N-1 and N-3 positions. All the compounds were characterized by spectroscopic techniques and found stable to air and moisture both in the solid and solution state. Moreover, m...

Vanadium oxides are promising oxidation catalysts because of their rich redox chemistry. We report the synthesis of VO2 nanocrystals with VO2(B) crystal structure. By varying the mixing ratio of the...

In this study we presented a novel series of NNO tridentate ligands generating imino, amido and oxo donor pocket for Pd(II) coordination. All the compounds were meticulously characterized by elemental analysis and advanced spectroscopic techniques, including FTIR, proton and carbon NMR. The synthesized compounds underwent rigorous evaluation for th...

A pyranopyrimidine derivative named as 10-amino-7-(2,4-diamino-6-oxidopyrimidin-1-ium-5-yl)-7H-benzo[7,8]chromeno[2,3-d]pyrimidin-9-ium-8-olate dimethylformamide acetic acid hydrate (ADCP) is synthesized by the reaction of 2-hydroxy-1-naphthaldehyde and 2,6-diaminopyrimidin-4-ol in the presence of ethanol and dimethylformamide. The synthesized comp...

The uncondensed form of polymeric carbon nitrides (PCN), generally known as melon, is a stacked two‐dimensional structure of poly(aminoimino)heptazine. Melon is used as a photocatalyst in solar energy conversion applications, but suffers from a poor photoconversion efficiency due to weak optical absorption in the visible spectrum, high activation e...

A new one-dimensional polymeric copper complex [Cu(DNSA)py] with salicylic acid and pyridine was synthesized and characterized by many techniques, including FT-IR, UV–Visible, elemental, TGA/DSC, and single crystal XRD analysis. In the crystal structure, two 3,5-dinitrosalicylic ligands were chelated by the copper cation, in which one ligand was...

The current research work is about the synthesis of functionalized crystalline anilide, i.e., (Z)-4-((2-nitrophenyl)amino)-4-oxobut-2-enoic acid (NAOB) and its experimental and theoretical investigation. The single-crystal X-rays diffraction technique is employed for the crystal structure determination. The crystal structure of NAOB is compared wit...

Polymorphism is an exciting feature of chemical systems where a compound can exist in different crystal forms. The present investigation is focused on the two polymorphic forms, triclinic (MSBT) and monoclinic (MSBM), of ethyl 3-iodo-4-((4-methylphenyl)sulfonamido)benzoate prepared from ethyl 4-amino-3-iodobenzoate. The prepared polymorphs were una...

The current work describes the synthesis, characterization, and theoretical investigation of a copper complex with a hydroxy functionalized Schiff base ligand. The complex [Cu(DHBEE)2] was characterized by UV–Visible, FT-IR, and mass spectrometry. The crystalline nature of [Cu(DHBEE)2] was examined using X-ray diffraction (XRD), revealing that t...

An asymmetric nanocomposite supercapacitor and a method of making the asymmetric nanocomposite supercapacitor. The asymmetric nanocomposite supercapacitor includes a negative electrode with monoclinic tungsten oxide (m-WO3) nanoplates, and a binding compound coated on one face of a substrate, and a positive electrode with a carbonaceous material an...

Sodium polysulfide/bromine RFBs are one the most promising electrolyte couples for scale-up technology. Sodium polysulfide/bromine RFB utilizes aqueous sodium polysulfide and sodium bromide solution as anolyte and catholyte, respectively, separated by a sodium ion exchange membrane. Polysulfide electrolyte of different concentrations ranging from S...

The global rapid transition from fossil fuels to renewable energy resources necessitates the implementation of long-duration energy storage technologies owing to the intermittent nature of renewable energy sources. Therefore, the deployment of grid-scale energy storage systems is inevitable. Sulfur-based batteries can be exploited as excellent ener...

The effective preparation of two new pyrimidineand pyridine-based organic crystalline salts with substituted acidic moieties (i.e., (Z)-4-(naphthalen-2-ylamino)-4-oxobut-2-enoic acid (DCNO) and 2-hydroxy-3,5-dinitrobenzoic acid (PCNP)) using methanol as a solvent has been reported. These molecular salts have ionic interactions that are responsible...

Morphological and functional modifications allow graphene to be applied as promising electrode support for improved electrochemical cell performance. Typically, however, modification requires complicated steps with various organic additives, such as binders, which causes low electrochemical stability, especially under harsh pH conditions. Herein, w...

Citation: Raza, A.R.; Rubab, S.L.; Ashfaq, M.; Altaf, Y.; Tahir, M.N.; Rehman, M.F.u.; Aziz, T.; Alharbi, M.; Alasmari, A.F. Evaluation of Antimicrobial, Anticholinesterase Potential of Indole Derivatives and Unexpectedly Synthesized Novel Benzodiazine: Characterization, DFT and Hirshfeld Charge Analysis. Molecules 2023, 28, 5024. https:// Abstract...

An asymmetric nanocomposite supercapacitor and a method of making the asymmetric nanocomposite supercapacitor. The asymmetric nanocomposite supercapacitor includes a negative electrode with monoclinic tungsten oxide (m-WO3) nanoplates, and a binding compound coated on one face of a substrate, and a positive electrode with a carbonaceous material an...

The anilide compound named (Z)-4-(2-methoxy-4-nitrophenyl)amino)-4-oxobut-2-enoic acid (MAOA) has been synthesized by the chemical reaction of 2-methoxy-4-nitroaniline and maleic anhydride in ethyl acetate. The synthesized compound was characterized by elemental analysis, FT-IR and UV-Vis spectroscopy, and TGA/DSC technique. Furthermore, the crysta...

The work here reflects synthesis, DFT studies, Hirshfeld charge analysis and crystal data exploration of pharmacologically important (R)-2-(2-(1,3-dioxoisoindolin-2-yl)propanamido)benzoic acid methyl ester (5) to understand its properties for further chemical transformations. The methyl anthranilate (2) was produced by the esterification of anthran...

Crystal structures of compounds 2-(2-chlorobenzylidene)hydrazinylthiazole (2a) 2-(2-bromobenzylidene)hydrazineylthiazole (2b) were analyzed with single crystal XRD. Both compounds possess Monoclinic crystal system and P21/n space group. Intermolecular interactions in single crystals were studied with Hirshfeld surface analysis (HSA). Electronic spe...

Energy from renewable resources is central to environmental sustainability. Among the renewables, sunlight-driven fuel synthesis is a sustainable and economical approach to produce vectors such as hydrogen through water splitting. The photocatalytic water splitting is limited by the water oxidation half-reaction, which is kinetically and energetica...

The three transition metal complexes of the ligand named as 2,4-dibromo-6-{[2-(1,1-dioxo-1H-benzoisothiazole-3-yl-amino)-ethylimino]-methyl}-phenol 3 were synthesized with divalent manganese, cobalt and nickel metal ions and characterized by employing different analytical methods including UV-visible, FT-IR and elemental analyses. The crystal struc...

Coordination complexes (1–4) of 2-amino-4-methylbenzothiazole and 2-amino-3-methylpyridine with Cu(CH3COO)2 and AgNO3 were prepared and characterized by UV/Vis and FT-IR spectroscopy. The molecular structure for single crystals of silver complexes (2 and 4) were determined by X-ray diffraction. The coordination complex (2) is monoclinic with space...

The utilization of heterogeneous catalysts during the production of biodiesel potentially minimize the cost of processing due to the exclusion of the separation step. The (X wt%)Ni–ZrO2 (where X = 10, 25 and 50) catalysts prepared through a hydrothermal process were tested for the production of biodiesel by the transesterification of waste cooking...

Herein, a one-pot synthesis of tetra-substituted imidazole, 4-chloro-2-(1-(4-methoxyphenyl)-4,5-diphenyl-1H-imidazol-2-yl)phenol (HL), is reported by the reaction of benzil, 5-bromosalicylaldehyde, ammonium acetate and anisidine. The synthesized imidazole was reacted with salts of 1st row transition metals (Co(ii), Ni(ii), Cu(ii), Mn(ii) and Zn(ii)...

1,3,4-Oxadiazole moiety is a crucial pharmacophore in many biologically active compounds. In a typical synthesis, probenecid was subjected to a sequence of reactions to obtain a 1,3,4-oxadiazole-phthalimide hybrid (PESMP) in high yields. The NMR (1 H and 13 C) spectroscopic analysis initially confirmed the structure of PESMP. Further spectral aspec...

Cement needs to be designed to prevent short-term and long-term gas migration scenarios. In the short term, the cement must prevent gas flow immediately following cement placement. In the long term, the cement must resist pressure and temperature cycling during drilling and production. Wells are subjected to substantial stresses from pressure and w...

Two new Cu(II) carboxylate complexes, Cu-NTA and Cu-DNTA, were prepared by treating 2-nitroterephthalic acid with CuSO4·5H2O at room temperature. The synthesized complexes were characterized by elemental (CHN), FT-IR, and thermogravimetric analysis. The crystal structures of both complexes were explored by single crystal X-ray diffraction analysis,...

Interfacial engineering can effectively improve the device's performance by suppressing non-radiative recombination. The inherited ionic and hydrophilic nature of most of the semiconducting materials used for the hole transport layer...