Carbonyl Compounds

Colthup, Norman B.; Daly, Lawrence H.; Wiberley, Stephen E.

doi:10.1016/b978-0-08-091740-5.50012-0

Cited by 129 publications

(184 citation statements)

References 81 publications

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“…The low wavenumber domain of FTIR spectra (between 400 cm À1 and 1950 cm À1 ) may be considered as the ngerprint region that allows to differentiate between the hydrophilic and hydrophobic PDs fractions. In the case of hydrophilic PDs, the appearance of an intense band at 1576 cm À1 , 71,74,75 characteristic for enol form with intramolecular resonance, reveals that the carbonyl (C]O) groups are mostly coupled with -OH groups (weak signals at 2655 cm À1 , 2704 cm À1 , 2725 cm À1 , 2800 cm À1 , and 2839 cm À1 ) by hydrogen bonding (Fig. S7 †).…”

Section: Structural Characterizationsmentioning

confidence: 99%

“…71,[74][75][76][77] The strong peaks at 1620 cm À1 and 1656 cm À1 can be attributed to the unsaturated C]C bonds. 71,73,74,78 FTIR spectra of hydrophobic PDs are more complex. The characteristic peak of free C]O groups at 1703 cm À1 is more pronounced in the hydrophobic fraction.…”

Section: Structural Characterizationsmentioning

confidence: 99%

“…The characteristic peak of free C]O groups at 1703 cm À1 is more pronounced in the hydrophobic fraction. 62,74,75,78 The absorption peaks at 1602 cm À1 and 1638 cm À1 can be ascribed to the C]C groups. 69,71,74 The additional peak from groups containing C]O or C]C bonds emerges at 1666 cm À1 .…”

Section: Structural Characterizationsmentioning

confidence: 99%

“…62,74,75,78 The absorption peaks at 1602 cm À1 and 1638 cm À1 can be ascribed to the C]C groups. 69,71,74 The additional peak from groups containing C]O or C]C bonds emerges at 1666 cm À1 . 62,71,74 The strong peaks at 1368 cm À1 and 1450 cm À1 arise from different methyl groups.…”

Section: Structural Characterizationsmentioning

confidence: 99%

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Acetone-derived luminescent polymer dots: a facile and low-cost synthesis leads to remarkable photophysical properties

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Section: Structural Characterizationsmentioning

confidence: 99%

Section: Structural Characterizationsmentioning

confidence: 99%

Section: Structural Characterizationsmentioning

confidence: 99%

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confidence: 99%

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Acetone-derived luminescent polymer dots: a facile and low-cost synthesis leads to remarkable photophysical properties

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“…The significantly higher frequency band at 1755 cm -1 suggests that the corresponding surface species contain C=O bonds, which are not conjugated to the C=C bonds. [14] The appearance of this vibration points to the formation of an oxopropyl surface species, resulting from the partial hydrogenation of acrolein molecules with only one H atom attached to the C=C bond. Figure 3 show a possible structure of the oxopropyl species.…”

Section: Figure 2 Acrolein Hydrogenation Over Pd(111) At 270 K (A) mentioning

confidence: 99%

Selective Hydrogenation of Acrolein Over Pd Model Catalysts: Temperature and Particle‐Size Effects

O’Brien

Dostert

Schauermann

et al. 2016

Chemistry A European J

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In this work, the selectivity in hydrogenation of acrolein over Fe3O4-supported Pd nanoparticles is investigated as a function of nanoparticle size in the 220-270 K temperature range. While Pd(111) shows nearly 100% selectivity towards the desired hydrogenation of the C=O bond to produce propenol, Pd nanoparticles were found to be much less selective towards this product.In-situ detection of surface species using infrared-reflection absorption spectroscopy shows that the selectivity towards propenol critically depends on the formation of an oxopropyl spectator species. While an overlayer of oxopropyl species is effectively formed on Pd(111) turning the surface highly selective for propenol formation, this process is strongly hindered on Pd nanoparticles by acrolein decomposition resulting in CO formation. We show that the extent of acrolein decomposition can be tuned by varying the particle size and the reaction temperature.As a result, significant production of propenol is observed over 12 nm Pd nanoparticles at 250 K, while smaller (4 and 7 nm) nanoparticles did not produce propenol at any of the temperatures 2 investigated. The possible origin of particle size dependence of propenol formation is discussed.This work demonstrates that the selectivity in hydrogenation of acrolein is controlled by the relative rates of acrolein partial hydrogenation to oxopropyl surface species and of acrolein decomposition, which has significant implications for rational catalyst design.3

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Selective Nanoscale Fabrication with Roughness Reduction of Polycrystalline Silicon by Physically Induced Fluorine Bonds Using Atomic Force Microscope

et al. 2023

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Polycrystalline silicon (poly‐Si) is widely used as a gate layer in integrated circuits, transistors, and channels through nanofabrication. Nanoremoval and roughness control are required for nanomanufacturing of various electronic devices. Herein, a nanoscale removal method is developed to overcome the limitations of microcracks, complex procedures, and time‐consuming conventional fabrication and lithography methods. The method is implemented with a mechanically induced poly‐Si phase transition using atomic force microscope (AFM). Mechanical force induces the covalent bonds between silicon and fluorine atoms which cause the phase transition of poly‐Si. Then, the bond structure of the Si molecules is weakened and selectively removed by nano‐Newton‐scale force using AFM. A selective nanoscale removal with roughness control is implemented in 0.5 mM TBAF solution after mechanical force (43.58–58.21 nN) is applied. By the magnitude of nano‐Newton force, the removal depth of poly‐Si is controlled from 2.66 to 21.52 nm. Finally, the nanoscale fabrication on poly‐Si wafer is achieved. The proposed nanoremoval mechanism is a simple fabrication method that provides selective, nanoscale, and highly efficient removal with roughness control.

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Carbonyl Compounds

Cited by 129 publications

References 81 publications

Acetone-derived luminescent polymer dots: a facile and low-cost synthesis leads to remarkable photophysical properties

Acetone-derived luminescent polymer dots: a facile and low-cost synthesis leads to remarkable photophysical properties

Selective Hydrogenation of Acrolein Over Pd Model Catalysts: Temperature and Particle‐Size Effects

Selective Nanoscale Fabrication with Roughness Reduction of Polycrystalline Silicon by Physically Induced Fluorine Bonds Using Atomic Force Microscope

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