Polarization of charge-transfer bands and rectification in hexadecylquinolinium 7,7,8-tricyanoquinodimethanide and its tetrafluoro analog

Article Abstract:

A Langmuir-Blodgett (LB) multilayer film of the unimolecular rectifier hexadecyl-gamma-quinolinium-7, 7,8-tricyanoquinodimethanide (C16H33gammaQ-3CNQ) has two distinct polarized charge-transfer bonds. At the higher desposition pressure, beyond the collapse point, the molecules undergo a slight compression, and change the twist angle thetas from maybe 30 degree to maybe 90 degree, lose the intramolecular intervalence transfer B band at 530 nm and acquire a new intermolecular charge transfer band, C, at 570 nm.

Electric properties, Charge transfer, Polarization (Electricity), Structure

---

Current rectification in a Langmuir-Schaefer monolayer of fullerene-bis[4-diphenylamino-4"-(N-ethyl-N-2'"-ethyl)amino-1,4-diphenyl-1,3-butadiene] malonate between Au electrodes

Article Abstract:

Current rectification by a Langmuir-Schaefer monolayer of a new molecule, fullerene-bis[4-diphenylamino-4"-(N-ethyl-N-2'"-ethyl)amino-1,4-diphenyl-1,3-butadiene] malonate, sandwiched between two gold electrodes is reported. The rectification is ascribed to the asymmetric placement of the relevant molecular orbitals, with respect to the metallic electrodes.

Monomolecular films, Chemical properties, Atomic properties, Fullerenes, Molecular orbitals

---

Spectroscopy and rectification of three donor-sigma-acceptor compounds, consisting of a one-electron donor (pyrene or ferrocene), a one-electron acceptor (perylenebisimide), and a C19 swallowtail

Article Abstract:

Spectroscopic characterization and unimolecular rectification (asymmetric electrical conduction) measurements of three donor-sigma-acceptor (D-[sigma]-A) compounds are described. Results reveal that hese molecules are arranged as one-molecule thick Langmuir-Blodgett monolayers between Au electrodes.

Observations, Optical properties, X-ray spectroscopy, Scanning tunneling microscopy

Similar abstracts:

• Abstracts: Characterization of anomalous flow and phase behavior in a Langmuir monolayer of 2-hydroxy-tetracosanoic acid
• Abstracts: Electron transfer in the reaction center of the Rb. sphaeroides R-26 studied by transient absorption. Supramolecular guanosine 5'-monophosphate structures in solution. Light scattering study
• Abstracts: DNA-network-templated self-assembly of silver nanoparticles and their application in surface-enhanced Raman scattering
• Abstracts: Electrochemical polymerization of fluoranthene and characterization of its polymers. Composite phospholipid-calcium carbonate microparticles: Influence of anionic phospholipids on the crystallization of calcium carbonate
• Abstracts: Investigation of sol-gel transition in pluronic F127/[D.sub.2]O solutions using a combination of small-angle neutron scattering and Monte Carlo simulation

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.