Thermal properties of mercury(II) and palladium(II) purine and pyrimidine complexes

Masoud, Mamdouh S.; Ali, Alaa E.; El-Kaway, Marwa Y. Abd

doi:10.1007/s10973-013-3551-z

Cited by 17 publications

(7 citation statements)

References 32 publications

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“…The latter broad band is taken as diagnostic for O h symmetry and assignable to 3 A 2g (F)→ 3 T 1g (F) and 3 A 2g (F)→ 3 T 1g (P). The broadness is attributed to the existence of more than d-d transition overlapped with each other [7]. The room temperature magnetic moment value for this complex is 2.81 B.M to assign high spin octahedral configuration with the presence of two unpaired electrons.…”

Section: Resultsmentioning

confidence: 99%

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Spectral, thermal studies and biological activity of pyrazinamide complexes

Ali

Elasala

Mohamed

et al. 2019

Heliyon

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Synthesis and spectrothermal characterization of new fabricated pyrazinamide complexes with metal [Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II)] salts are reported. The structural chemistry of these complexes is achieved via elemental analysis, spectral (UV, visible, and IR), thermal (DTA and TGA) as well as magnetic susceptibility. In these new octahedral complexes (Zn complex is tetrahedral), pyrazinamide acts as a bidentate ligand. Pyrazinamide complexes show higher activity than pyrazinamide for some strains. The geometry of the complexes is converted from Oh to Td during their thermal decomposition. The decomposition mechanisms are suggested and the thermodynamic parameters for the thermal decomposition steps are evaluated.

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Section: Resultsmentioning

confidence: 99%

“…Masoud et al. reported the complexing properties and thermal behavior of some biologically active compounds [5, 6, 7, 8, 9, 10, 11, 12]. The main purpose of this work is to study the complexing properties and thermal behavior of pyrazinamide ligand and its metal complexes.…”

Section: Introductionmentioning

confidence: 99%

Spectral, thermal studies and biological activity of pyrazinamide complexes

Ali

Elasala

Mohamed

et al. 2019

Heliyon

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“…The slopes "a" and intercept "b" for DSC curves of the compounds The thermo gravimetric data were used to evaluate kinetic parameters of solid-state reactions involving weight loss (or gain) has been investigated. [49][50][51] Broido's technique: [52,53] The activation energy related to each stage of decomposition was conjointly evaluated by Broido's technique. The following equation is used to calculate the activation energy (Ea):…”

Section: Tablementioning

confidence: 99%

Physical Studies and Hyperthermia Biomedical Modeling Application of Fe3O4 Magnetic Nanoclusters Coated with Barbituric Acid

El-Kholany,

Gebreel

2024

Preprint

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From both technological and clinical perspectives, cancer statistics exhibit a decline in new diagnosis and treatment techniques. As a result, there is still a lot of potential for improvement in terms of therapeutic alternatives. In this study, emerging biomedical uses of a newer class of composite magnetic nanoparticles in hyperthermia with optimum size have cleared the way for multimodal imaging techniques including nanoparticle-based MRI and CT. A magnetic nano-cluster (Fe3O4) coated with barbituric acid and its complex were synthesized. The structure, mode of bonding, surface charge, physical size, and morphology of the prepared materials were studied. The mechanisms of the thermal decomposition for the naked Fe3O4 magnetic nanoparticle (MNP), Coated NP, and the prepared complex were studied by thermal gravimetric analysis (TGA). The activation energy for the prepared compounds was determined. The prepared materials ' thermal transitions and kinetic studies were determined by differential scanning calorimetry technique (DSC). A model was designed using the 3D Slicer software platform and imported to Computer Simulation Technology (CST studio). The model was simulated in the presence of prepared nanoparticles: barbituric acid@ Fe3O4 to calculate the specific absorption rate (SAR) and thermal simulation of the model. The results indicate that the prepared coated MNP with a 9–12 nm diameter range enhances microwave imaging and hyperthermia treatment at low frequencies. Therefore, localized heating (hyperthermia) using multifunctional nanoparticles is gaining popularity as a form of “multimodal nanothermal therapy and diagnoses.

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“…The applications based on Debye model for selected complexes are given from the following equations [23]:…”

Section: Thermal Analysismentioning

confidence: 99%

“…From TGA, Figures (21)(22)(23)(24)(25)(26)(27) Table (3) the mechanism of decomposition can be given.…”

Section: 𝑪𝒑mentioning

confidence: 99%

Thermal behavior and thermodynamic parameters of some complexes of biologically active nucleic acid constituents

Masoud¹,

Ramadan²,

Sweyllam³

et al. 2021

World J. Adv. Res. Rev.

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The thermal behavior of some complexes derived from biologically nucleic acid constituents has been studied applying differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) techniques. Thermodynamic parameters, decompositions and thermal stabilities are calculated and explained. All the complexes gave exothermic peaks with -ve signs for change of entropy values, ΔS which indicate that the activated transition states are more ordered, i.e. in a less random molecular configuration than the reacting complexes. TGA gives the mechanism of decomposition.

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Thermal properties of mercury(II) and palladium(II) purine and pyrimidine complexes

Cited by 17 publications

References 32 publications

Spectral, thermal studies and biological activity of pyrazinamide complexes

Spectral, thermal studies and biological activity of pyrazinamide complexes

Physical Studies and Hyperthermia Biomedical Modeling Application of Fe3O4 Magnetic Nanoclusters Coated with Barbituric Acid

Thermal behavior and thermodynamic parameters of some complexes of biologically active nucleic acid constituents

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