Ruthenium(II) complexes with the mixed ligands 2,2'-bipyridine and 4,4'-dialkyl ester-2,2'-bipyridine as pure red dopants for a single-layer electrophosphorescent device

Article Abstract:

The polypyridine ruthenium(II) complexes with mixed ligands 4,4-dimethyl ester-2,2-bipyridine and 4,4-dibutyl ester-2,2 dibutyl ester-2,2 bipyridine were synthesized and characterized to report their spectroscopic, electrochemical, and electroluminescent properties. Both Ru(II) complexes show strong emission from the triplet metal-to-ligand charge-transfer excited state, red-shifted emission spectra and good solubility in organic solvents compared to the frequently used tris(bipyridine) Ru(II) complexes.

Charge transfer, Ligands, Ligands (Chemistry), Chemical properties

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Characterization of vinyl polymer/silica colloidal nanocomposites using solid state NMR spectroscopy: probing the interaction between the inorganic and organic phases on the molecular level

Article Abstract:

The molecular interaction between the organic and inorganic phases of vinyl polymer/silica colloidal nanocomposites is studied by using NMR spectroscopy. Results indicate that the molecular interaction between the polymer and silica phases involves hydrogen bond formation between the pyridine nitrogen and a surface hydroxyl proton for P4VP/silica nanocomposite particles.

Usage, Nuclear magnetic resonance spectroscopy

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Synchrotron X-ray diffraction and reflection studies of a polymacromonomer monolayer at the air-water interface: transition from aligned single molecules to homogeneous layer

Article Abstract:

The monolayers of polymacromonomers with poly(vinyl)pyridine side chains of different length, polyPVP20.8 and polyPVP46.7, are studied at the air-water surface. The phase transitions are not only caused by intermolecular interactions, as known from polymers with a simple architecture, but also by intramolecular interactions.

Polymers, Chemistry, Physical and theoretical, Physical chemistry

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