Synthesis of new cellulose derivatives—XXIII. Synthesis of chlorocellulose and its conversion products. Preparation of amino- and nitrilocellulose

Polyakov, A. I.; Rogovin, Z. A.

doi:10.1016/0032-3950(63)90093-5

Cited by 10 publications

(6 citation statements)

References 2 publications

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“… a Abbreviations: W–H: Weetall–Hill synthesis; − P–R: Polyakov–Rogovin synthesis; M–M: Marshall and Mottola synthesis;. DMDCS: dimethyldichlorosilane; DHAQ: dihydroxyanthraquinone; CPG: controlled-pore glass; SG: silica gel; APTS: aminopropyltriethoxysilane; R: −NH–CH 2 –CH 2 –NH–SO 2 –C 6 H 4 –NN– linker. b BET specific surface area (m 2 ·g –1 ). c Preconcentration factor. d Maximum sorption capacity for Fe(III) (μmol·g –1 ). e The structure is shown in Figure a. f NM: not mentioned; ND: not detected. g The value in parentheses is the maximum sorption capacity for Cu. …”

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

“…However, before the second step, the oxine has to be modified using a very complicated reaction. On the basis of the reaction process of Tashiro and Shimura, Polyakov and Rogovin immobilized 8-hydroxyquinoline on cellulose using a variety of linkers, − but the process was also found to be lengthy and complicated and in fact needs a wide range of toxic chemicals (viz., SOCl 2 , pyridine, DMF, dioxin, etc.). Naturally, the Weetall–Hill, − Sugawara et al, and Goswami et al methods and all cases of oxine immobilization , require very stringent reaction conditions (e.g., refluxing for more than 90–120 h), mechanical shaking for a longer time, a large number of costly and hazardous reagents, repetitive filtrations, vacuum or inert atmosphere, and sometimes control of the temperature within a stipulated range.…”

Section: Introductionmentioning

confidence: 99%

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Ex Cathedra Immobilization of 8-Hydroxyquinoline to Inorganic Carriers via a New Silane Coupling Reagent for Extractive Sample Cleanup of Iron(III)

et al. 2017

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By the use of a new silane coupling reagent, dimethyldichlorosilane (DMDCS), effective and instantaneous immobilization of 8-hydroxyquinoline (HQ) on an inorganic carrier (silica gel, SG) has been carried out for the facile synthesis of an extractor material (composition: {Si(OSi) p=4(H2O) x=0.16} n=11[−Si(CH3)2–NH–C6H4–NN–HQ] z=4·25H2O; molar mass: 4010.3 g/mol). The material (thermal stability: ≤100 °C; chemical stability: ≤8 M HNO3) possesses a high Brunauer–Emmett–Teller surface area (BET-SAFe(III): 1170 m2·g–1), an appreciable preconcentration factor (PFFe(III): 145.1), and high breakthrough capacity (BTCFe(III): column exchange capacity, 269 μmol·g–l; Langmuir Q 0, 278.6 μmol·g–1) for Fe(III). Along with these discernible analytical qualities, a high level of reusability (<800 cycles @ 95% recovery) reflects the material warranty. Fe(III), present as [Fe(OH)(H2O)5]2+ at the recommended pH (1.90 ± 0.15), binds at the highest occupied molecular orbital (HOMO) of the sorbent (η = 7.69 eV) through hard–soft binding with an appreciable binding energy (−14.2 eV). The breakthrough capacity (BTC: 269–278.6 μmol·g–1) was found to be the product of the amount of extractor HOMO (280 μmol·g–1) and the degree of polymerization of the adsorbed metal ion, x (i.e., BTC = [amount of HOMOextractor (μmol·g–1)] × x for monomeric (x = 1) and polymeric (x > 1) species). The findings reveal substantial improvement of Weetall–Hill immobilization of chelating ligands on inorganic carriers.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ex Cathedra Immobilization of 8-Hydroxyquinoline to Inorganic Carriers via a New Silane Coupling Reagent for Extractive Sample Cleanup of Iron(III)

et al. 2017

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“…Synthesis of 1. A slurry of 5 g of ethylenediamine cellulose prepared from chlorodeoxycellulose was made in a mixture of tetrahydrofuran (150 cm 3 ) and distilled water (200 cm 3 ) at room temperature. Aqueous NaOH (2.5 mol dm -3 ) was added dropwise to raise the pH to 11.5.…”

Section: Methodsmentioning

confidence: 99%

Equilibrium Studies on the Optimization of Solid-Phase Extraction of Metal Ions with Pyrogallol-Anchored Cellulose Synthesized by a New Method and Applications of the Extraction in Metal Enrichment, Removal, and Determination

Gurnani

Singh

2004

Ind. Eng. Chem. Res.

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Pyrogallol is anchored onto cellulose via −NH−CH2−CH2−NH−SO2−C6H4−NN− linker to prepare an effective sorbent for solid-phase extraction of Cu(II), Zn(II), Fe(III), Ni(II), Co(II), Cd(II), and Pb(II) from aqueous solutions. The modified cellulose is characterized by FT-IR, 13C CPMAS NMR, TGA, and elemental analyses. The conditions for effective sorption are optimized with respect to different experimental parameters in both batch and column processes. The feasibility of the sorption process was judged from both kinetic and thermodynamic points of view. The lower limit of detection as well as the enrichment factor for each metal ion was evaluated. Analytical utility of the solid-phase extraction is illustrated by successful determination of metal ions in natural water, pharmaceutical, and milk samples by flame AAS coupled with enrichment on cellulose loaded with pyrogallol.

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“…After its diazotization, the glass was coupled with 0.25% (w/v) of enzyme/chelating ligand solution at 0 °C. Polyakov-Rogovin coupled Tashiro-Shimura reaction process was also found to be lengthy and complicated, and in fact, it needs a wide range of toxic chemicals (viz., SOCl 2 , pyridine, DMF, dioxin, etc. ).…”

Section: Introductionmentioning

confidence: 99%

Fluorescent Resin-Assisted Extraction for Selective Separation and Preconcentration of Mercury(II) and Its Online Detection

et al. 2017

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Dimethyldichlorosilane (DMDCS) driven silane coupling is enabled by productive immobilization of an azo-dye to inorganic carrier through m-nitroaniline as a bridging component. The material has been utilized for the selective sample cleanup of zinc(II), cadmium(II), and mercury(II), respectively, extracted as [Zn5(OH)6(H2O)2]4+, [Cd4(OH)4(H2O)3]4+, and [Hg4(OH)3(H2O)2]5+. The corresponding luminescent nanomaterial was used for selective detection of mercury(II) at trace level (LOD ≥ 0.04 × 10–5 M) amid a matrix of possible interferences. Breakthrough capacity (BTC) and preconcentration factor (PF) for the respective metal ions (BTCZinc(II), 600; BTCCadmium(II), 460; BTCMercury(II), 540 μM g–1; and PFZinc(II), 197; PFCadmium(II), 148; PFMercury(II), 145) were found to be excellent. Sequential separation of zinc(II), cadmium(II), and mercury(II) was achieved by employing selective eluents (mineral acids of very low concentration, 5 × 103 μM). BTC (530 ± 70 μM g–1) was found to be the product of the amount of extractor frontier orbitals (132 μM g–1) and polynuclear state of sorbed species, x (i.e., BTC = {amount of HOMO}× x; x = 4 for cadmium(II), mercury(II); and x = 5 for zinc(II)). Along with these analytical qualities, ease of synthesis, high level of reusability (≤2700 cycles @ 95% exchange capacity), and chemical stability (post treatment BTC with 8 M HNO3, 8 M HCl, and 5 M H2SO4 was ≤95%) is an insignia of the material.

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Synthesis of new cellulose derivatives—XXIII. Synthesis of chlorocellulose and its conversion products. Preparation of amino- and nitrilocellulose

Cited by 10 publications

References 2 publications

Ex Cathedra Immobilization of 8-Hydroxyquinoline to Inorganic Carriers via a New Silane Coupling Reagent for Extractive Sample Cleanup of Iron(III)

Ex Cathedra Immobilization of 8-Hydroxyquinoline to Inorganic Carriers via a New Silane Coupling Reagent for Extractive Sample Cleanup of Iron(III)

Equilibrium Studies on the Optimization of Solid-Phase Extraction of Metal Ions with Pyrogallol-Anchored Cellulose Synthesized by a New Method and Applications of the Extraction in Metal Enrichment, Removal, and Determination

Fluorescent Resin-Assisted Extraction for Selective Separation and Preconcentration of Mercury(II) and Its Online Detection

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