Thermodynamic studies on poly[N-(n-octadecyl)maleimide] (PMI-18)/solvent systems by inverse gas chromatography with capillary columns

Barrales‐Rienda, J. M.; Vidal-Gancedo, José

doi:10.1021/ma00179a042

Cited by 38 publications

(6 citation statements)

References 21 publications

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“…According to the Flory-Huggins theory, the interaction parameter v which characterizes interactions between the solute and the stationary phase may be determined using the following expression [35][36][37]:…”

Section: Determination Of the Ils Solubility Parameter Dmentioning

confidence: 99%

Measurement of activity coefficients at infinite dilution in 1-hexadecyl-3-methylimidazolium tetrafluoroborate ionic liquid

Mutelet¹,

Jaubert²

2007

The Journal of Chemical Thermodynamics

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Section: Determination Of the Ils Solubility Parameter Dmentioning

confidence: 99%

Measurement of activity coefficients at infinite dilution in 1-hexadecyl-3-methylimidazolium tetrafluoroborate ionic liquid

Mutelet¹,

Jaubert²

2007

The Journal of Chemical Thermodynamics

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“…To study the magnetic behavior of paramagnetic species, different materials can be used as scaffolds, like polymers, metallic nanoparticles, SAMs, or dendrimers. Dendrimers are a very special class of hyperbranched macromolecules, which are synthesized step-by-step in order to ensure a good monodispersity.…”

Section: Introductionmentioning

confidence: 99%

Radical Dendrimers: A Family of Five Generations of Phosphorus Dendrimers Functionalized with TEMPO Radicals

et al. 2014

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Five novel generations of phosphorus dendrimers based on a cyclotriphosphazene core with stable TEMPO radicals end groups have been synthesized and studied by EPR, SQUID, 1 H NMR, 31 P NMR, FT-IR, and UV−vis spectroscopy. The nitroxyl radicals exhibit a strong exchange interaction, which depends on the dendrimer generation and the temperature. An |Δm s | = 2 transition has been observed in each generation in dilution conditions demonstrating the intramolecular origin of the radicals interaction. There exists a direct proportionality between the EPR |Δm s | = 2 transition intensity and the number of radicals by generation; consequently, the utility of EPR for the determination of the substitution efficiency on dendrimers by paramagnetic species is quite good. From the UV−vis characterization, we have observed that the molar extinction coefficient value is also proportional to the number of TEMPO groups. The magnetic properties of the zero, first and fourth generation dendrimers studied by SQUID magnetometry show antiferromagnetic interaction between radicals.

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“…Supramolecular magnetic assemblies can be built using a range of different materials as scaffolds: functionalized polymers, , dendrimers, − or metallic nanoparticles. In this work, we used gold nanoparticles as supports for organic radicals to study magnetic interactions.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Interactions in Spin-Labeled Au Nanoparticles

et al. 2014

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A series of gold nanoparticles functionalized with TEMPO-modified disulfide 2 have been prepared and studied by electron paramagnetic resonance (EPR) spectroscopy, UV−vis, transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), and thermogravimetric analysis (TGA). In order to increase the packing of spin labels on the particle surface, heat-induced size evolution and ligand exchange reactions were used. The optimized synthesis included a one-pot reaction at room temperature that led to gold nanoparticles with a controlled large size (ca. 7 nm) and high coverage of radicals. These nanoparticles showed a |Δm s | = 2 transition at half-field, which gives direct evidence of the presence of a high-spin state and permits an EPR study of the nature of the magnetic coupling between the spins. The results showed dominant antiferromagnetic interactions between radicals, but at lower temperatures, a ferromagnetic contribution was observed.

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Thermodynamic studies on poly[N-(n-octadecyl)maleimide] (PMI-18)/solvent systems by inverse gas chromatography with capillary columns

Cited by 38 publications

References 21 publications

Measurement of activity coefficients at infinite dilution in 1-hexadecyl-3-methylimidazolium tetrafluoroborate ionic liquid

Measurement of activity coefficients at infinite dilution in 1-hexadecyl-3-methylimidazolium tetrafluoroborate ionic liquid

Radical Dendrimers: A Family of Five Generations of Phosphorus Dendrimers Functionalized with TEMPO Radicals

Magnetic Interactions in Spin-Labeled Au Nanoparticles

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