Palladium immobilized on <i>in situ</i> cross-linked chitosan superfine fibers for catalytic application in an aqueous medium

Liang, Lulu; Nie, Li; Jiang, Minjuan; Bie, Fusheng; Shao, Linjun; Qi, Chenze; Zhang, X. Man; Liu, Xuejing

doi:10.1039/c8nj02183j

Cited by 21 publications

(6 citation statements)

References 39 publications

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“…The results are summarized in Table 2. Methyl acrylate is typically added in excess [37] to compensate evaporation, moreover unreacted iodobenzene in the reaction mixture causes high leaching of palladium from the catalyst [38]. Experiments with various solvents (entry 1-10) revealed that dimethylacetamide (DMA) was the most efficient solvent (entry 1, 3.6% yield).…”

Section: Optimization Of Reaction Conditionsmentioning

confidence: 99%

Pd Supported IRMOF-3: Heterogeneous, Efficient and Reusable Catalyst for Heck Reaction

et al. 2019

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IRMOF-3 with a high surface area prepared by a hydrothermal method was used for deposition of Pd(OAc) 2 on IRMOF-3 particles. The final catalyst was characterized with FT-IR, nitrogen physisorption, thermogravimetry, scanning electron microscopy, transmission electron microscopy combined with energy dispersive X-ray analysis, wide angle X-ray diffraction spectroscopy and X-ray photoelectron spectroscopy. The prepared porous catalyst was effectively used in the Heck coupling reaction in the presence of an organic base. The reaction parameters such as the type of base, amounts of catalyst and solvents, temperature were optimized. The catalyst was then easily separated, washed, and reused 4 times without significant losses of catalytic activity.

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Section: Optimization Of Reaction Conditionsmentioning

confidence: 99%

Pd Supported IRMOF-3: Heterogeneous, Efficient and Reusable Catalyst for Heck Reaction

et al. 2019

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“…Only few polymers, however, can be electrospun from aqueous solutions or low-toxic solvents. A typical example of a water-soluble polymer is poly(ethylene oxide) (PEO) [6,7], which can also be used as a spinning agent for a number of other (bio-)polymers that are not electrospinnable solely [8,9]. Amongst the water-resistant polymers, polyacrylonitrile (PAN), which can be dissolved in dimethyl sulfoxide (DMSO), is often used [10,11].…”

Section: Introductionmentioning

confidence: 99%

New Polymers for Needleless Electrospinning from Low-Toxic Solvents

et al. 2019

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Electrospinning is a new technology whose scope is gradually being developed. For this reason, the number of known polymer–solvent combinations for electrospinning is still very low despite the enormous variety of substances that are potentially available. In particular, electrospinning from low-toxic solvents, such as the use of dimethyl sulfoxide (DMSO) in medical technology, is rare in the relevant scientific literature. Therefore, we present in this work a series of new polymers that are applicable for electrospinning from DMSO. From a wide range of synthetic polymers tested, poly(vinyl alcohol) (PVOH), poly(2ethyl2oxazolene) (PEOZ), and poly(vinylpyrrolidone) (PVP) as water-soluble polymers and poly(styrene-co-acrylonitrile) (SAN), poly(vinyl alcohol-co-ethylene) (EVOH), and acrylonitrile butadiene styrene (ABS) as water-insoluble polymers were found to be suitable for the production of nanofibers. Furthermore, the influence of acetone as a volatile solvent additive in DMSO on the fiber morphology of these polymers was investigated. Analyses of the fiber morphology by helium ion microscopy (HIM) showed significantly different fiber diameters for different polymers and a reduction in beads and branches with increasing acetone content.

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“…Later, Liang et al used itaconic acid (IA) as a cross-linking agent to cross-link CS/PEO nanofibers based on the reaction between the amino groups on CS and carboxyl groups on IA. 149 Furthermore, first by immersing cross-linked fibers in an Na 2 PdCl 4 aqueous solution, and then by reducing the Pd 2+ into Pd 0 species with the addition of hydrazine (a strong reductant), a Pd-immobilized composite nanofiber membrane having catalytic activity was prepared. In 2018, for the first time, Lee et al 150 produced an antiadhesive barrier composed of cartilage acellular matrix (CAM)/cross-linker nanofibers by e-spinning and cross-linking.…”

Section: Classification and Mechanismmentioning

confidence: 99%

Cross-linking electrospinning

Han,

Wang,

Kang

et al. 2023

Nanoscale

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Palladium immobilized on in situ cross-linked chitosan superfine fibers for catalytic application in an aqueous medium

Abstract: Chitosan composite superfine fibers with a diameter of 321 ± 99 nm were prepared by electrospinning with PEO as the co-spinning polymer and itaconic acid as the in situ cross-linking agent.

Cited by 21 publications

References 39 publications

Pd Supported IRMOF-3: Heterogeneous, Efficient and Reusable Catalyst for Heck Reaction

Pd Supported IRMOF-3: Heterogeneous, Efficient and Reusable Catalyst for Heck Reaction

New Polymers for Needleless Electrospinning from Low-Toxic Solvents

Cross-linking electrospinning

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