Stacking effect of polyfluorene on the chemical shift and electron transport

Article Abstract:

The structures, NMR chemical shifts, absorption spectra, frontier molecular orbital, and transition density matrices of pi-stacked polyfluorenes is investigated by ab initio calculations. The results reveal that the relative stability for syn and anti conformers is almost equivalent in B3LYP calculations, however, the syn conformer becomes much more stable than the anti conformer in MP2 calculations, which is consistent with the experimental finding that only the syn conformers are relevant.

California, Nuclear magnetic resonance, Electron transport

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Chemical imaging by single pulse interferometric coherent anti-Stokes Raman scattering microscopy

Article Abstract:

A single pulse interferometric coherent anti-Stokes Raman (CARS) spectroscopy method is used to determine broadband CARS spectra and microscopy images of liquid and polymer samples. The spectral bandwidth limits, sensitivity, homodyne amplification advantages, spatial resolution, depolarization, chromatic aberration and chemical imaging aspects of the new CARS method are discussed.

Analysis, Raman spectroscopy, Interferometry, Chromatic aberration

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Solubility of small molecule in ionic liquids: a model study on the ionic size effect

Article Abstract:

The effect of size on the solvent power of ionic liquids is investigated on the basis of the extended Flory-Huggins theory. It is found that for the ionic liquids composed of various cations and anions, the ionic liquid has the larger effective volume of the ionic components.

Science & research, Research, Chemical equilibrium, Ionic solutions

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