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Enhancing the single-molecule magnetic performance of β-diketonate Dy(III) complexes by modulating the coordination microenvironment and magnetic interaction: from a mononuclear to a dinuclear structure.
Dalton Trans
October 2024
State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China.
Based on a β-diketonate ligand, a mononuclear Dy(III) complex, [Dy(dmpd)(bpy)] (1) (dmpd = 4,4-dimethyl-1-phenylpentane-1,3-dione, bpy = 2,2'-dipyridyl), of [DyNO] type has been synthesized with a capping nitrogen-containing coligand. Then, a dual capping coligand 2,2'-bipyrimidine (bmp) is introduced to be a bridge to link two β-diketonate-Dy(III) motifs, leading to a new dinuclear Dy(III) complex, [Dy(dmpd)(bmp)] (2). Dy(III) centers in both complexes feature an NO octacoordinated environment with an approximate square-antiprism geometry ().
View Article and Find Full Text PDFPorphyrin-Based Brain Tumor-Targeting Agents: [Cu]Cu-porphyrin and [Cu]Cu-TDAP.
Mol Pharm
November 2023
Division of Applied RI, Korea Institute of Radiological and Medical Sciences (KIRAMS), Seoul 01812, Korea.
The aim of this study is to evaluate a radioactive metal complex platform for brain tumor targeting. Herein, we introduce a new porphyrin derivative, 5,10,15,20-(tetra-,-dimethyl-4-aminophenyl)porphyrin (TDAP), in which four ,-dimethyl-4--phenylenediamine (DMPD) moieties are conjugated to the porphyrin labeled with the radiometal Cu. DMPD affected the pharmacokinetics of porphyrin in terms of retention time in vivo and tumor-targeting ability relative to those of unmodified porphyrin.
View Article and Find Full Text PDFComprehensive Metabolite Profiling of Berdav Propolis Using LC-MS/MS: Determination of Antioxidant, Anticholinergic, Antiglaucoma, and Antidiabetic Effects.
Molecules
February 2023
Department of Chemistry, Faculty of Science, Ataturk University, Erzurum 25240, Turkey.
Propolis is a complex natural compound that honeybees obtain from plants and contributes to hive safety. It is rich in phenolic and flavonoid compounds, which contain antioxidant, antimicrobial, and anticancer properties. In this study, the chemical composition and antioxidant activities of propolis were investigated; ABTS, DPPH and DMPD were prepared using radical scavenging antioxidant methods.
View Article and Find Full Text PDFDetermination of flavor-potentiating compounds in different Italian tomato varieties.
J Food Biochem
May 2021
Department of Chemistry, University of Milan, Milan, Italy.
Umami taste, known as appetizing sensation, is mainly imparted by monosodium glutamate (MSG, the first identified umami factor) in synergistic combination with some 5' ribonucleotides such as inosine 5'-monophosphate, IMP, guanosine 5'-monophosphate, GMP, and adenosine 5'-monophoshate, AMP. The level of free glutamic acid in tomatoes is higher than in other vegetables or fruits and increases with ripening and industrial processing. In addition, due to the presence of bioactive metabolites, tomatoes and tomato-based products are among the most consumed healthy food items.
View Article and Find Full Text PDFSynthesis, structural, spectral, antioxidant, bioactivity and molecular docking investigations of a novel triazole derivative.
J Biomol Struct Dyn
September 2022
Faculty of Art and Science, Giresun University, Giresun, Turkey.
The structural, spectroscopic and electronic properties of 4-(4-nitrophenyl)-5-(pyridin-3-yl)-2,4-dihydro-3H-1,2,4-triazole-3-thione have been analyzed by using single crystal X-ray diffraction (SCXRD), H and C NMR chemical shifts and FT-IR spectroscopic methods both theoretically and experimentally. The tautomeric (thiol and thione) energetic analysis results, structural optimization parameters (bond lengths and angles), vibrational wavenumbers, proton and carbon NMR chemical shifts, UV-Vis. parameters, the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) analyses and Molecular Electrostatic Potential (MEP) surface have been calculated by using DFT/B3LYP quantum chemical method with 6-311++G(2d,2p) basis set to compare with the experimental results.
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