A non-water-soluble modified β-cyclodextrin for sensitive electrode

Bouzitoun, Mouna; Mlika, R.; Gam, H.; Ouada, H. Ben; Majdoub, Mustapha; Sfihi, H.

doi:10.1016/j.msec.2005.10.065

Cited by 11 publications

(6 citation statements)

References 22 publications

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“…In our group, different immobilization methods have been used to overcome this problem: the b-CDs molecules were fixed to silica insulator surfaces; either by chemically grafting polymethyl-hydrosiloxanes (PMHS) chains as a coupling agent [18] or by physically incorporating CDs in plasticized poly(vinyl chloride) (PVC) [19]. In previous work, we have chemically modified b-CDs (b-CDs (Bz)) and used them as sensitive membranes for heavy metal cations detection (such as Pb 2þ and Cd 2þ Þ [20]. This has given us a great stimulus to the deeper study of their electrical and dielectric properties.…”

Section: Introductionmentioning

confidence: 99%

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Electrical properties of ITO/benzylated cyclodextrins (β-CDs (Bz))/Al diode structures

Bouzitoun

Dridi

Chaâbane

et al. 2006

Science and Technology of Advanced Materials

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Investigations of the electrical characteristics of benzylated cyclodextrins (b-CDs (Bz)) diodes are reported. We present current-voltage characteristics and impedance spectroscopy measurements performed on partially benzylated cyclodextrins b-CDs (Bz) thin films in sandwich structures ITO/b-CDs (Bz)/Al. The static electrical characterizations show a space charge limited conduction (SCLC) and a conductivity with power low frequency behavior characteristic of a hopping transport in disordered materials. The impedance spectra can be discussed in terms of an equivalent circuit model designed as a parallel resistor R P and capacitor C P network in series with resistor R S . We extract numerical values of these parameters by fitting experimental data. Their evolution with bias voltages has shown that the SCLC mechanism is characterized by an exponential trap distribution. We estimated from the capacitance voltage characteristic an acceptor concentration of about 10 11 cm À3 due to trap states. r

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Section: Introductionmentioning

confidence: 99%

“…In this paper, we have investigated the electrical properties of this partially benzylated b-cyclodextrin whose synthesis was presented in the previous work [20]. We investigated charge-carrier injection and transport processes of b-CDs (Bz) diodes via I-V characteristics as well as impedance spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Electrical properties of ITO/benzylated cyclodextrins (β-CDs (Bz))/Al diode structures

Bouzitoun

Dridi

Chaâbane

et al. 2006

Science and Technology of Advanced Materials

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“…68 The first protocols for halogenation used methanesulfonyl halides or triphenyl phosphine with iodine gas. 57,69,70 Later, more convenient route using N-halosuccinimides was developed. 71 This approach is currently favoured as it uses a stable reagent and works for different halogens.…”

Section: Substitution Of Primary Hydroxylsmentioning

confidence: 99%

“…tert-Butyldimethylsilyl (TBDMS) is an excellent protecting group for 6-position and can be cleaved with BF 3 in tetrahydrofuran 55 or tetra-n-butylammonium fluoride. 54 Alternatively, primary hydroxyls can be benzylated with benzyl chloride 57 and deprotected via palladium catalysed hydrogenolysis. 56 The remaining hydroxyl groups can be acetylated prior to the polymerisation to increases the solubility of cyclodextrin derivative in common organic solvent.…”

Section: Introductionmentioning

confidence: 99%

Natural cyclodextrins and their derivatives for polymer synthesis

2020

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“…The functionalization of microfibers/nanofibers with cyclodextrins will provide unique properties to traditional composite fibers. For instance, micro/nanofibers have potential to be used for filtering tiny particles as well as serving as barriers for liquid/vapor penetration due to the large surface area of nanoporous structure [11][12][13][14]. In addition, the hydrophobic cavity of CDs allows them to form host-guest complexes with various small molecules and macromolecules.…”

Section: Introductionmentioning

confidence: 99%

Electrospinning and Catalytic Properties of Cyclodextrin Functionalized Polyoxymethylene (POM) Nanofibers Supported by Silver Nanoparticles

Zhang

Wang

et al. 2021

Advances in Polymer Technology

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A series of novel composite microfibers composed of β-cyclodextrin (β-CDs) functionalized POM (polyoxymethylene) were prepared using electrospining technology with a mixture of hexafluoroisopropanol (HFIP) and N,N-dimethylformamide (DMF) as solvent. The concentration of β-CDs with respect to the POM was varied from 0 to 50 wt.%. The effect of β-CDs content on the morphology of POM/β-CD composite microfiber was investigated. The results showed that the introduction of β-CDs reduced the surface roughness and porosity of the microfibers, and the morphology of the fibers was changed. The increase of β-CDs content from 10% to 50% has led to increased average diameter of POM/β-CD composite fiber from 2.1 μm to 6.4 μm. The mechanical properties of the blend fiber mats were further investigated. In addition, silver nanoparticles were introduced to the POM/β-CD composite microfiber matrices during electrospinning. The POM/β-CD composite fiber allows CDs to form host–guest complexes with various small molecules and macromolecules. The TEM, SEM, XRD, and XPS were utilized to characterize the prepared samples. The data suggest that Ag nanoparticles were homogeneously distributed within the POM/β-CD fibers, and no aggregation was observed. The catalytic activity of Ag nanoparticles was tracked by ultraviolet-visible (UV-vis) spectroscopy which showed excellent catalytic degradation performance of organic dyes in the presence of NaBH4. The Ag/POM/β-CD mats are promising for use in waste treatment, molecular recognition, catalysis, and so on.

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A non-water-soluble modified β-cyclodextrin for sensitive electrode

Cited by 11 publications

References 22 publications

Electrical properties of ITO/benzylated cyclodextrins (β-CDs (Bz))/Al diode structures

Electrical properties of ITO/benzylated cyclodextrins (β-CDs (Bz))/Al diode structures

Natural cyclodextrins and their derivatives for polymer synthesis

Electrospinning and Catalytic Properties of Cyclodextrin Functionalized Polyoxymethylene (POM) Nanofibers Supported by Silver Nanoparticles

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