Chemisorption of CuII and CoII chlorides and β-diketonates on silica gel functionalized with 3-aminopropyltrimethoxysilane

Espı́nola, José G.P.; Oliveira, Severino F. de; Lemus, Wolfango Eloy S.; Souza, A. G.; Airoldi, Cláudio; Moreira, J.C

doi:10.1016/s0927-7757(99)00493-8

Cited by 43 publications

(23 citation statements)

References 7 publications

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“…Carbon atom 10 of the urea group was assigned to the peak at 154.8 ppm. 13 C NMR results are in agreement with the immobilization of the APTS molecule on silica gel surface and also confirm the anchorage of the diiuron on the SiAPTS surface through two processes based on the same reaction, but with and without disprotonating agent. However, SiDi1 product prepared in the absence of this agent gave a lower degree of diuron immobilization than SiDi2, as evident in the spectrum of Fig.…”

Section: Resultssupporting

confidence: 83%

“…On the other hand, the band around 1700 cm −1 corresponds to a urea group, which involves the carbonyl stretching of the diuron structure and is also observed on SiDiX surfaces. Solid state nuclear magnetic resonance for both 13 C and 29 Si nuclei was used to characterize the synthesized compounds. The assignments for all carbon peaks were based on the silylant agent and diuron structures shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The assignments for all carbon peaks were based on the silylant agent and diuron structures shown in Fig. 2 and the complete 13 C spectra for all samples are presented in Fig. 3.…”

Section: Resultsmentioning

confidence: 99%

“…In order to increase the signal to noise of the solid-state spectra, the CP/MAS technique was used (20). 29 Si and 13 C CP/MAS spectra were obtained with pulse repetitions of 1 and 3 s and contact times of 1 and 5 ms, respectively. The numbers of the scans were 22,000 and 19,000 for silicon and carbon, respectively (20,30).…”

Section: Characterizationmentioning

confidence: 99%

“…The new silica-bound complexing agents can be useful in a wide range of problems related to heterogeneous catalysis (9, 10), metal ion preconcentration (11,12), ion exchange (13,14), stationary phases for chromatography (15,16), enzyme catalysts (17,18), biotechnology (19), and so on. However, the use of those new materials to immobilize agrochemical compounds is rarely explored and only one report presents this suggested application (20).…”

Section: Introductionmentioning

confidence: 99%

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The Pesticide 3-(3,4-Dichlorophenyl)-1,1-dimethylurea (Diuron) Immobilized on Silica Gel Surface

Prado

Airoldi

2001

Journal of Colloid and Interface Science

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Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 99%

“…The assignments for all carbon peaks were based on the silylant agent and diuron structures shown in Fig. 2 and the complete 13 C spectra for all samples are presented in Fig. 3.…”

Section: Resultsmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Pesticide 3-(3,4-Dichlorophenyl)-1,1-dimethylurea (Diuron) Immobilized on Silica Gel Surface

Prado

Airoldi

2001

Journal of Colloid and Interface Science

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Organosilicon ion‐exchange and complexing adsorbents

Воронков

Власова

Pozhidaev

et al. 2006

Polymers for Advanced Techs

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Long and systematic investigations of the present authors in the creation of organosilicon adsorbents, ion‐exchange and complexing agents are summarized. A wide series of such adsorption materials were synthesized by hydrolytic polycondensation and oxidizing hydrolytic polycondensation of organosilicon monomers of general formula X3SiQY and X3SiQZQSiX3, where X = Cl, AlkO; Q = alkylene C1–C3, phenylene; Y and Z = carbofunctional ionic and complexing groups. In this way, it was possible to obtain polyorganylsilsesquioxanes with carbofunctional groups such as Y = SH, SO3H, S(CH2)2NH2, SCH2COOH, NHC(O)CH3, NHC(S)CH3, NHC(NH)NH2, NHC(NH)NHC(NH)NH2, Z=S, SS, S(CH2)2S, NHC(O)NH, NHC(S)NH, NHSSNH, NHS(O)NH, NHS(O2)NH, NHC(SO2)NH, NHC(NH)NH, NHC(S)S− · NH3+, etc., which turned out to be very effective ion‐exchange and complexing adsorbents. These adsorbents have a crosslinked silsesquioxane structure. The three‐dimensional structure of the polyorganylsilsesquioxane skeleton of these adsorbents provides for their high thermal and chemical stability. They are stable up to 230–270°C and do not lose their adsorption activity in 10–18 mol/l H2SO4 at 100°C and in boiling concentrated HCl. The ion‐exchange and complexing properties of organosilicon adsorbents were studied on 50 elements of the Periodical system. Effective adsorbents toward noble metals, rare, rare‐earth and toxic elements have been found. The practical application of organosilicon adsorbents is described. Copyright © 2006 John Wiley & Sons, Ltd.

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Two Independent Routes to Synthesize Identical Silicas by Grafting Ethylenimine or 2-Aminoethanethiol, Their Cation Adsorbing Abilities, and Thermodynamic Data

Airoldi

Arakaki

2002

Journal of Colloid and Interface Science

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Chemisorption of CuII and CoII chlorides and β-diketonates on silica gel functionalized with 3-aminopropyltrimethoxysilane

Cited by 43 publications

References 7 publications

The Pesticide 3-(3,4-Dichlorophenyl)-1,1-dimethylurea (Diuron) Immobilized on Silica Gel Surface

The Pesticide 3-(3,4-Dichlorophenyl)-1,1-dimethylurea (Diuron) Immobilized on Silica Gel Surface

Organosilicon ion‐exchange and complexing adsorbents

Two Independent Routes to Synthesize Identical Silicas by Grafting Ethylenimine or 2-Aminoethanethiol, Their Cation Adsorbing Abilities, and Thermodynamic Data

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