Direct visual evidence for quinoidal charge delocalization in poly-p-phenylene cation radical

Article Abstract:

Direct visual evidence is provided for quinoidal charge delocalization in poly-p-phenylene (PPP) cation radical by using three-dimensional (3D) charge difference densities. The transition dipole moment of [S.sub.1] has represented mesoscopic dipole antennae for the quaterphylene (QP) cation radical.

Plastics Material and Resin Manufacturing, Plastics materials and resins, Polyphenylene Resins, Analysis, Charge transfer, Polyphenylenes

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Photoelectron spectroscopic investigations of chemical bonding in organically stabilized PbS nanocrystals

Article Abstract:

The surface structure of organically capped PbS nanocrystals using synchrotron radiation excited core-level photoelectron spectroscopy is studied. The results indicate that the trioctylphosphine ligands passivate only the surface S sites while oleic acid ligands appear to bind mainly to Pb sites.

All Other Miscellaneous Chemical Product and Preparation Manufacturing, Chemical preparations, not elsewhere classified, Oleic Acid, Optical properties, Lead compounds, Photoelectron spectroscopy

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Resorcarene-based receptor: Versatile behavior in its interaction with heavy and soft metal cations

Article Abstract:

A resorcarene derivative designed with pendant arms having sulfur donor atoms namely 5,11,17, -23-ethylthiomethylated calix[4] resorcarene is described. Electrical conductance provided key information regarding the composition of metal-ion complexes and their decomposition.

Ions

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