Structure-Property Relationship of Cellulose Ethers – Influence of the Synthetic Pathway on Cyanoethylation

Volkert, Bert; Wagenknecht, W.; Mizuno, Mai

doi:10.1021/bk-2010-1033.ch018

Cited by 5 publications

(2 citation statements)

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“…Cyanoethylation has been widely applied to polysaccharides, e.g., to cellulose [ 1 ], inulin [ 2 ], and starch [ 3 ]. Onda reported on cyanoethylation of pullulan with degrees of substitution (DS) up to 2.71 [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

“…Cyanoethylation is established for polysaccharides, but the substituent pattern has only been studied for cyanoethylamylose and starch [ 3 ]. In most cases, the products have only been roughly characterized by NMR and IR spectroscopy or by elementary analysis [ 1 – 2 ]. Verraest described the substituent distribution in O -cyanoethylinulin by HPLC analysis and 13 C NMR spectroscopy [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

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Cyanoethylation of the glucans dextran and pullulan: Substitution pattern and formation of nanostructures and entrapment of magnetic nanoparticles

Fiege¹,

Lünsdorf²,

Atarijabarzadeh³

et al. 2012

Beilstein J. Org. Chem.

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SummaryCyanoethylglucans with a degree of substitution in the range of 0.74 to 2.40 for dextran and 0.84 to 2.42 for pullulan were obtained by Michael addition of acrylonitrile to the glucans under various conditions. Products were thoroughly characterized, comprising elementary analysis, NMR and ATR–IR spectroscopy, and analysis of the substituent distribution in the glucosyl units by GC–FID and GC–MS of the constituting monosaccharide derivatives. Nanostructuring of the highly substituted cyanoethylpolysaccharides was performed by dialysis against a non-solvent. In the presence of ferromagnetic iron-oxide nanoparticles, multicore cyanoethylglucan-coated ferromagnetic nanoparticles were formed by selective entrapment. The specific interaction between cyano groups and iron could be proven. The size distribution and morphology of the nanoparticles were analyzed by dynamic light scattering (DLS), scanning electron microscopy (SEM) and energy-filtered transmission electron microscopy (EF–TEM) with parallel electron energy loss spectroscopy (PEELS).

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Section: Introductionmentioning

confidence: 99%