A5030895814- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Crystal structures of chemical compounds
- Synthesis and biological activity
- Synthesis and Characterization of Heterocyclic Compounds
- Crystallography and molecular interactions
- Structural and Chemical Analysis of Organic and Inorganic Compounds
- Metal complexes synthesis and properties
- Chalcogenide Semiconductor Thin Films
- Chemical Synthesis and Analysis
- Quantum Dots Synthesis And Properties
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Phenothiazines and Benzothiazines Synthesis and Activities
- Molecular spectroscopy and chirality
- Organic Chemistry Cycloaddition Reactions
- Computational Drug Discovery Methods
- Synthesis and Reactivity of Sulfur-Containing Compounds
- Synthesis of heterocyclic compounds
- Chemistry and Stereochemistry Studies
- Pharmacogenetics and Drug Metabolism
- nanoparticles nucleation surface interactions
- Eicosanoids and Hypertension Pharmacology
- Electrochemical Analysis and Applications
- Synthesis of Organic Compounds
KK Women's and Children's Hospital
2025
Allama Iqbal Open University
2014-2023
Hong Kong Metropolitan University
2021
Riphah International University
2021
Iowa State University
1997
Quaid-i-Azam University
1994-1996
University of Tübingen
1994
The intervening barrier to produce hydrogen from water is the frustratingly slow kinetics of splitting reaction. In addition, insufficient understanding key obstacle oxygen evolution reaction (OER) an obstruction perceptive design efficient OER electrocatalysts. this research, we present synthesis, characterization, and electrochemical evaluation nickel oxide/nickel sulfide (NiO/NiS) heterostructures its counterparts oxide (NiO) (NiS) as low-cost electrocatalysts for splitting. These have...
This article presents our research concerning the synthesis of new thiophene-thiourea derivatives (1-12) and their pharmacological properties. These novel were synthesized characterized by IR, 1 H 13 C NMR spectroscopy, mass spectrometry elemental analysis. The crystal structure N , -diphenyl- '-(thiophene-2-carbonyl)-thiourea was determined from single X-ray diffraction data. It crystallizes in monoclinic space group P 2 with unit cell dimensions a =11.7469(5) Å, b =6.0849(2) c=12.5792(6)...
Nickel and copper metal complexes of N-(R-carbamothioyl)-4-nitrobenzamide (R = diphenyl ethylbutyl) were synthesized characterized by IR, 1 H NMR, mass spectrometry elemental analysis. The spectroscopic data are consistent with the ligand containing two O S chelated ligands. N-(diphenylcarbamothioyl)-4-nitrobenzamide, HL , was a single crystal X-ray diffraction study. It crystallizes in triclinic space group P unit cell dimensions 6.8044(4) Å, b 10.0113(6) c 13.2365(8) α °, β 78.171(4) γ...
Background/Objectives: Food insecurity during pregnancy is associated with higher risks of negative physical outcomes for both mother and child. This study aims to understand experiences food among low-income Singaporean pregnant women its impact on nutritional status. Methods: In this cross-sectional, mixed-methods study, 49 food-insecure were recruited from KK Women's Children's Hospital between November 2021 2023, which 11 in-depth interviews conducted. Questionnaires, anthropometric...
Abstract Four novel thiourea derivatives containing a thiazole moiety were synthesized and characterized by IR, 1H 13C NMR, mass spectrometry elemental analysis. The crystal structure of 1a was determined from single X-ray diffraction data. It crystallizes in monoclinic space group P21/n with unit cell dimensions = 11.7752(6) Å, b= 3.8677(2) c= 27.4126(13) Å β 92.734(5) Å. There is strong intramolecular hydrogen bond the type N-H⋯O, H⋯O distance 2.5869(19) fragmentation pattern has also been...
A variety of benzimidazole by the heterocyclization orthophenylenediamine were synthesized in 69–86% yields. The compounds 3a-f and 6a-f characterized further investigated as jack bean urease inhibitors. Density functional theory (DFT) studies performed utilizing basis set B3LYP/6-31G (d, p) to acquire perception into their structural properties. Frontier molecular orbital (FMO) analysis all 3a–f was computed at same level get a notion about chemical reactivity stability. mapping...
Abstract A series of new N‐Substituted‐ N ′‐(4,6‐dimethylpyrimidin‐2‐yl)‐thiourea derivatives ( 3a , 3b 3c 3d ) and related fused heterocyclic compounds 4a 4b 4c 4d were synthesized using tetrabutylammonium bromide as phase transfer catalyst (PTC). ‐[(2 E )‐5,7‐dimethyl‐2 H ‐[1,2,4] thiadiazolo [2,3‐ a ] pyrimidin‐2‐ylidene] prepared by oxidative cyclization . The structures these novel characterized IR, 1 NMR, 13 C mass spectrometry, the elemental analysis. crystal determined from single...
New thermally stable epoxy polymers containing copper and nickel ions have been prepared by curing diglycidyl ether of bisphenol A (DGEBA) with amino-thiourea metal complexes. Characterization the complexes was carried out using infrared spectroscopy, elemental analysis mass spectrometry. Determination optimum value epoxy/thiourea complex ratio studied means differential scanning calorimetry. This method is based on search for maximum enthalpy change. The properties resulting...
Copper(II) complexes of various N-(dialkylcarbamothioyl)-nitrosubstituted benzamide [dialkyl = di-n-butyl (1a, 2a); hexyl, methyl (3a); butyl, ethyl (4a)] have been synthesized and characterized by elemental analysis, IR spectroscopy atmospheric pressure chemical ionization-mass spectrometry (MS-APCI). The molecular structure the complex 2a was determined single-crystal X-ray diffraction. These were used as single-source precursors for deposition copper sulfide thin films aerosol assisted...
Nickel(II) complexes of N-(di-alkyl-carbamothioyl)-4-nitrobenzamide (alkyl = ethyl or n-propyl) have been synthesized and characterized by infrared spectroscopy, elemental analysis, nuclear magnetic resonance mass spectrometry. The structures bis[N-(diethylcarbamothioyl)-4-nitrobenzamide]nickel(II) (2a) bis[N-(dipropylcarbamothioyl)-4-nitrobenzamide]nickel(II) (2b) determined X-ray crystallography. FTIR NMR the nickel showed absence N–H proton stretch shift ν C=O C=S as expected. Both used...
Abstract magnified image 2‐(4‐Substituted aryl)‐4H‐[1,3]thiazolo[3,2‐a][1,3,5]triazine‐4‐thiones ( 3a , 3b ) and 2‐(2‐thiophene)‐4H‐[1,3]thiazolo[3,2‐a][1,3,5]triazine‐4‐thione 3d were synthesized by the reaction of arylisothiocyanates/thiophene‐2‐isothiocyanate with 2‐aminothiazole in presence tetrabutylammonium bromide as phase transfer catalyst. Compound 3c was catalytic reduction (10% Pd‐C) . Compounds characterized IR, 1 H NMR, 13 C elemental analysis. All compounds tested vitro against...
Abstract Two flavonoids, karanjin (Kj) and karanjachromene (Kc) have been investigated spectrophotometrically for their mode of interactions with double stranded (ds)-DNA at blood (7.4) stomach (4.7) pH human body temperature (37°C). Benesi-Hildebrand equation was used to evaluate the binding constants, K b . Binding constants both values showed stronger flavonoids formation 1:1 flavonoid-DNA complex via intercalative mode. However, were evaluated be comparatively greater than values. The...
ABSTRACT The diastereoselective synthesis of optically active 1,3‐disubstituted tetrahydro‐β‐carbolines using polar protic Pictet–Spengler cyclization ( S )‐tryptophan methyl ester with five aldehydes RCHO (R═CH 3 , C 2 H 5 7 4 9 and 6 ) was studied. As an alternate route, the same subsequent methylation resulting tetrahydro‐β‐carboline carboxylic acids were also performed for comparison. 13 NMR electronic circular dichroism (ECD) studies time‐dependent density functional theory ECD...