Metal Chelates with Some Cellulose Derivatives. II. Preparation and Characterization of Co(II)-CMC Complexes

Abdelhadi, A.; Hosny, Wafaa M.; Basta, Altaf H.; El‐Saied, Houssni

doi:10.1080/03602559408013108

Cited by 37 publications

(12 citation statements)

References 9 publications

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“…0.67 and 1.5, respectively, were used as ligands, as in previous work (12)(13)(14)(15)(16). Carboxymethyl cellulose (CMC) and hydroxyethyl cellulose (HEC) of degree of substitution (D.S.)…”

Section: Methodsmentioning

confidence: 99%

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Characterization of Polymer Complexes by Thermal and Ir Spectral Analyses

Basta

El‐Saied

2000

Polymer-Plastics Technology and Engineering

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The characterization of polymer complexes were studied by thermal and infrared (IR) spectral analyses from room temperature to 1000°C and from wave number 4000 cm Ϫ1 to 200 cm Ϫ1 , respectively. The polymer complexes were those prepared from cellulose ether (e.g., carboxymethyl cellulose and hydroxyethyl cellulose) with some transition metals (e.g., CrCl 3 , FeCl 3 , CuCl 2 , CoCl 2 , and NiCl 2 ). The thermal analysis measurements, such as activation energy (E a ) and order of degradation (n), were calculated from nonisothermal thermogravimetric analysis, using the Coats-Redfern equation and the least squares method. The results obtained show that the complexation of cellulose ether with most mentioned metal ions improved their thermal stabilities. There is a relationship between the measurements of thermal analysis and the degree of ligand-metal-bond (nephlauxetic parameter, ␤), electronegativity of the metal cation, and the chelating sites of the ligand. The IR-spectra measurements, such as the shift of the band maximum, correspond to the stretching vibration of OH, the mean strength of the hydrogen bond, and the degree of crystallinity, evidence to some extent of the results of thermal analysis, especially the case of carboxymethyl cellulose-metal complexes.

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“…0.67 and 1.5, respectively, were used as ligands, as in previous work (12)(13)(14)(15)(16). Carboxymethyl cellulose (CMC) and hydroxyethyl cellulose (HEC) of degree of substitution (D.S.)…”

Section: Methodsmentioning

confidence: 99%

“…Infrared spectroscopy cannot be used to elucidate fully the structure of the complex, but it can give some useful information about the functional groups of the ligand chelated with the metal ion, as described in our previous work (12)(13)(14)(15)(16).…”

Section: Ir Spectral Measurementsmentioning

confidence: 99%

Characterization of Polymer Complexes by Thermal and Ir Spectral Analyses

Basta

El‐Saied

2000

Polymer-Plastics Technology and Engineering

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“…Difference in sorption values on the two substrates may be attributed to the distance between the carboxyl groups in each substrate, the structure of each substrate and its chelating behavior. The carboxymethyl group is bidentate [22,23] and chelates with cupric ion through the oxygen of the ether linkage and the oxygen of the carboxylate hydroxyl group to form a 5-membered ring. On the other hand, the alkali treated starch graft copolymer contains only the carboxyl group which is monodentate [24].…”

Section: Heavy Metal Sorptionmentioning

confidence: 99%

Preparation of Anionic Starch Containing Carboxyl Groups and its Utilization as Chelating Agent

Khalil

Abdel-Halim

2001

Starch/Stärke

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Maize starch, methyl acrylate, ceric ammonium nitrate, monochloroacetic acid, nitric acid hydrochloric acid, sodium hydroxide, ethanol, mercuric acetate, cupric acetate, zinc acetate, lead acetate and ethylenediaminetetraacetic acid (EDTA) were of analytical grade. Preparation of poly(methyl acrylate)-starch graft copolymerPoly(methyl acrylate)-starch graft copolymer was prepared according to a reported method [10] using ceric

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“…Cellulose acetate (CA) and carboxymethyl cellulose (CMC) regard the most chemistry market cellulose derivatives. Where, they have wide range of applications, e.g., RO-membranes for water desalination, metal absorbents, stabilizing agents and paper additive [1][2][3][4][5]. Moreover, CMC has been applied in tissue engineering of cartilage [6][7][8], for treating dry eye after phacoemulsification [9], as filler in tablet with active ingredients [10], as well as additive to increase the drug bioavailability and releasing [11], Mixtures of amino acid and CMC, have been used to obtain zero-order releases of drugs, with water as the releasing medium [12], or simulated gastric media [9].The literature reported different methods to evaluate the bioactive compound, e.g., via biological, using antimicrobial plate diffusion method [13][14][15], as well as anti-tumor test, using the microculture tetrazolium Assay (MTT) [16,17] Where, cell viability was assessed and cytotoxic index IC50 was calculated.…”

Section: Introductionmentioning

confidence: 99%

Discovery Potent of Bagasse (CMC-L-Phe) As Bioactive Material Based on DFT Calculations

Elhenawy¹,

Basta²,

El‐Saied³

et al. 2018

Eurasian J Anal Chem

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This present work deals with evaluating the safety application of synthesizing nano-CMC-L-Phe bioactive compound, as drug discovery application, using DFT theories. In this respect, the stereochemistry studies as well as geometrical optimization of ligand at density functional theory (DFT), using DFT\B3LYP with 6-31G* level of theory calculation of frontier molecular orbitals (FMOs) were carried out. These calculations were performed for studying the stability and reactivity of ligand, heat formation, dipole moment, polarizability, thermodynamic parameters, calculated global, local chemical reactivity to give better understanding; as well as structure-property relationships (SPR) based on electronic structure of the CMC-Phe. The global and local chemical reactivity were examined for synthesized biopolymer, which showed the Lform more reactive against surrounding biological media than D-form. The ADMET profile was calculated in silico, the pharmacokinetic parameters of the ligand showed the promising futures for drug application. The docking study was suggested that, the CMC-L-Phe have a good binding affinity, and interacted with FAK active site to form stable complex, this is evident the ligand is suitable FAK inhibitor.

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Metal Chelates with Some Cellulose Derivatives. II. Preparation and Characterization of Co(II)-CMC Complexes

Cited by 37 publications

References 9 publications

Characterization of Polymer Complexes by Thermal and Ir Spectral Analyses

Characterization of Polymer Complexes by Thermal and Ir Spectral Analyses

Preparation of Anionic Starch Containing Carboxyl Groups and its Utilization as Chelating Agent

Discovery Potent of Bagasse (CMC-L-Phe) As Bioactive Material Based on DFT Calculations

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