Electronic polarization reversal and excited state intramolecular charge transfer in donor/acceptor ethynylpyrenes

Article Abstract:

The electronic polarization and electronic properties of pyrene are reversed in the study, by coupling electron-donating and electron withdrawing moieties through ethynyl conjugation. It is concluded from the absorption and emission spectra that the electronic properties are affected by the extension of pi-conjugation via an ethynyl bridge and incorporation of donors and acceptors.

Analysis, Charge transfer, Electron donor-acceptor complexes, Polarization (Electricity)

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Surfactant-encapsulated europium-substituted heteropolyoxotungatate: the structural characterization and photophysical properties of its solid state, solvent-casting film, and langmuir-blodgett film

Article Abstract:

The surfactant-encapsulated europium-substituted heteropolyoxotungatate, (DODA) 11H2[Eu (SiW11O39) 2(H2O) 4] (SEC-2), is structurally described and its photophysical behaviors are studied. Although the electronic properties of SEC-2 originate from polyoxometalates (POM)-2a, the cationic surfactant plays an important role in modifying its photophysical behaviors.

Polycyclic aromatic compounds

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Mutual solubilities of water and hydrophobic ionic liquids

Article Abstract:

Data is presented for mutual solubilities between water and hydrophobic imidazolium, pyridinium, pyrrolidinium and piperidinium-based cations. It is observed that the hydrophobic tendency of the cation family increases from imidazolium to pyridinium to pyrrolidinium to piperindinium-based ionic liquids.

Observations, Ionic solutions, Chemical properties, Hydrophobic effect

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