Metal chelates with some cellulose derivatives. Part I. Preparation and characterization of chromium (III)–carboxymethyl cellulose complexes

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

doi:10.1002/pi.1994.210350102

Cited by 36 publications

(14 citation statements)

References 12 publications

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“…This was done by determining the IR measurements, such as the degree of shifting the band maximum assigned to the stretching (symmetric and asymmetric) vibration of hydroxyl group with respect to unchelated cellulose ether (⌬, cm Ϫ1 ), the mean strength of the hydrogen bond (MHBS), and the degree of crystallinity (C r D). This confirms that the free unsubstituted hydroxyl groups are involved in chelation (12,14). From Table 4, it is clear that chelation of CMC with Cr(III) and Ni(II) ions leads to an increase in the mean strength of the hydrogen bond and the degree of crystallinity, compared with unchelated CMC.…”

Section: Ir Spectral Measurementssupporting

confidence: 60%

“…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%

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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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Section: Ir Spectral Measurementssupporting

confidence: 60%

“…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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“…When ligno-cellulose is chemically modified, it may present still higher capacities with a specificity to catch a particular kind of pollutants. For heavy metals, for instance, various supports have been successfully used: dyed cottons or agricultural waste, [3][4][5][6] carboxymethyl cellulose, 7,8 and celluloses modified with nitrogen-containing groups. 9 -12 In previous studies, cellulose modified through amidoximation 13,14 has been used for metal-ion com-plexation [among them, Cr(III)], and cationized cellulose has been used for anionic dye adsorption.…”

Section: Introductionmentioning

confidence: 99%

Sorption of chromium oxy‐anions onto cationized ligno‐cellulosic material

Zghida¹,

Baouab²,

Gauthier³

2002

J of Applied Polymer Sci

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Quaternary ammonium groups were grafted onto ligno-cellulosic material (cotton, wood sawdust, and maize-cob flour) to obtain a support able to adsorb oxyanions containing chromium atoms (chromate and dichromate). For both anions in aqueous solutions, adsorption proceeded very quickly and reached a limit value dependent on the rate of ammonium grafting; at saturation, the Cr/N ϩ ratio was always close to 1/1 for chromate anions, but two ammonium sites were needed to link a dichromate anion in a stable structure, resulting in the same 1/1 Cr/N ϩ ratio. Tentatives for modeling the adsorption process were performed with the Langmuir, Freundlich, and Jossen equations. A nearly total desorption occurred only when these saturated supports were treated with solutions of high ionic strength (4M potassium chloride).

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“…, and the latter band corresponds to CH rocking in the ring [29]. From Table 1, 21 are assigned to asymmetrical and symmetrical stretching vibration of carboxyl group.…”

mentioning

confidence: 99%

Structures and high fluorescence of novel nanocomposites of sodium carboxymethyl cellulose/Tb(III) prepared at different pHs

Xiong

et al. 2016

Polymer Composites

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Lanthanide metal complexes as novel luminescent metal‐organic frameworks with potential application such as probes, sensors and labels, have greatly been developed. This paper presents novel nanocomposites by reacting terbium salt with the sodium carboxymethyl cellulose (NaCMC) at different pHs, Which were characterized by SEM, TEM, FTIR, XPS, WAXD, GPC, UV‐Vis, and PL. The results show that Tb3+ ions react with O of COO‐, ‐OH, and ‐COC on NaCMC. The morphologies of these nanocomposites showed spheroidal‐like with the size around 100 nm at around neutral pH, but show rod‐like and band‐like around 100 nm in width and about 500 nm in length at pH = 11 and 12. They emit bright green characteristic fluorescence of Tb3+ under ultraviolet light due to the antenna effect when NaCMC transfer the energy efficiently to the Tb ions around neutral pHs. However, at higher pH, they show weaker fluorescence intensity in spite of strong crystalline because abundant Na+ are involved in them and affected the efficiency of energy transfer between NaCMC and Tb3+. These nanocomposites could find potential biological applications base on their fluorescent and biodegradable properties. POLYM. COMPOS., 38:E498–E507, 2017. © 2016 Society of Plastics Engineers

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Metal chelates with some cellulose derivatives. Part I. Preparation and characterization of chromium (III)–carboxymethyl cellulose complexes

Cited by 36 publications

References 12 publications

Characterization of Polymer Complexes by Thermal and Ir Spectral Analyses

Characterization of Polymer Complexes by Thermal and Ir Spectral Analyses

Sorption of chromium oxy‐anions onto cationized ligno‐cellulosic material

Structures and high fluorescence of novel nanocomposites of sodium carboxymethyl cellulose/Tb(III) prepared at different pHs

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