Modified dispersion of functionalized multi-walled carbon nanotubes in acetonitrile

Li, Heng; Nie, Jundan; Kunsági‐Máté, Sándor

doi:10.1016/j.cplett.2010.04.053

Cited by 11 publications

(6 citation statements)

References 30 publications

(31 reference statements)

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“…Detailed information on the calculations is to be found in previous publications. 14,15 In accordance with previous studies on RS and weak host-guest interactions, [14][15][16] the increase observed in the photoluminescence (PL) signal reflects the increase in concentration of ergosterol-primycin complexes. To obtain quantitative data on the thermodynamics of the chemical equilibrium in the system, the equilibrium constant was determined by the Benesi-Hildebrand method, utilizing the five series of data associated with the five different concentrations of primycin (0.002-0.006 M) ( Figure 3).…”

Section: Resultssupporting

confidence: 82%

Complex formation between primycin and ergosterol: entropy–driven initiation of modification of the fungal plasma membrane structure

2012

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The interaction of the antibiotic primycin with the main fungal sterol, ergosterol, was investigated in vitro in order to monitor the effect of primycin on the fungal plasma membrane at the molecular level. The thermodynamic parameters of complex formation were determined by measuring Rayleigh scattering as a signal sensitive to particle size. The Benesi-Hildebrand method validated the 1 : 1 stoichiometry of the primycin-ergosterol complexes. A very low enthalpy change (ΔH=-1.14 kJ mol(-1)) was measured during the complex formation, which itself cannot be responsible for the molecular association. However, the entropy production (ΔS=29.78 J mol K(-1)) observed during the complex formation can describe the molecular interaction. This effect is probably due to the partial destruction of the solvation shell of the interacting species before the interlinking of the molecules. The results highlight the importance of ergosterol as concerns the mode of effect of primycin in the treatment of fungal infections. As the entropy has a determinant role in the ergosterol-primycin interaction, this interaction exhibits a very high temperature dependence, with the important consequence that the effect exerted by primycin on the cell membranes increases with rising temperature, and the effect is therefore pronounced in fevered bodies.

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Section: Resultssupporting

confidence: 82%

Complex formation between primycin and ergosterol: entropy–driven initiation of modification of the fungal plasma membrane structure

2012

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“…As a representative example, the dispersion of hydroxylated MWCNTs was modied in non-protic acetonitrile solvent using treatment by ethanol. 201 Either the MWCNT-OH powder was used as it is or previously treated by EtOH. These two types of powders were diluted by acetonitrile and the solvation was followed by photoluminescence and Rayleighscattering methods.…”

Section: Special Comparative Studies and Techniques For Understanding...mentioning

confidence: 99%

Dispersion of carbon nanotubes in water and non-aqueous solvents

2013

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Contemporary methods for dispersion of carbon nanotubes in water and non-aqueous media are discussed. Most attention is paid to ultrasonic and plasma techniques and other physical techniques, as well as to the use of surfactants, functionalizing and debundling agents of distinct nature (elemental substances, metal and organic salts, mineral and organic acids, oxides, inorganic and organic peroxides, organic sulfonates, polymers, dyes, natural products, biomolecules, and coordination compounds). Special studies on CNTs solubilization are examined.

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“…Further electrochemical importance, our previous investigations have shown that deposition of other aromatics onto nanostructured surface of semiconductors, such as adsorption of carbon nanotubes onto CeO 2 or ZnO surfaces, shows itself strong dependence on the solvents used [31,32].…”

Section: Introductionmentioning

confidence: 99%

Investigation of phenol electrooxidation in aprotic non-aqueous solvents by using cyclic and normal pulse voltammetry

et al. 2019

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Electrooxidation of phenol was studied on platinum electrode in five aprotic nonaqueous solvents (acetonitrile, dimethyl sulfoxide, dimethyl formamide, acetone, and tetrahydrofuran) with cyclic and normal pulse voltammetry. The cyclic voltammetric results showed that fouling of the electrode surface by the polyphenol took place continuously in dimethyl formamide and a weak passivation of the electrode could be observed in dimethyl sulfoxide. From this solvent, a coherent and mechanically removable, weakly adsorbed layer could be obtained. In the other three solvents, the electrode passivated completely after five scans. Diffusion barrier properties of the polymer formed in acetone were the most pronounced of all solvents towards a redox probe. Normal pulse voltammetric investigations showed that the extent of electrode passivation is insignificant in three of the solvents used. It was due to the application of the short anodic potential pulses where the oxidation of phenol occurred and the formed oligomers diffused into the bulk of solution.

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Modified dispersion of functionalized multi-walled carbon nanotubes in acetonitrile

Cited by 11 publications

References 30 publications

Complex formation between primycin and ergosterol: entropy–driven initiation of modification of the fungal plasma membrane structure

Complex formation between primycin and ergosterol: entropy–driven initiation of modification of the fungal plasma membrane structure

Dispersion of carbon nanotubes in water and non-aqueous solvents

Investigation of phenol electrooxidation in aprotic non-aqueous solvents by using cyclic and normal pulse voltammetry

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