Spontaneous copolymerization of maleic anhydride andN-vinylimidazole in 1,4-dioxane. I. Charge transfer complexation and kinetics of the copolymerization

The equilibrium constant of the charge-transfer complexation of butyl vinyl ether (bve) and maleic anhydride (manh) is measured in carbon tetrachloride as 0.30�0.02 dm3 mol-1 at 37°C by n.m.r. spectroscopy. The radical terpolymerization of the bve-manh-acrylonitrile (acn) system is carried out in chloroform. The participation of the complex is considered and the monomer reactivity ratios of the bve-manh complex and acn are obtained as rc 83 and racn 0.0090, respectively.

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Charge Transfer Complexation Boosts Molecular Conductance Through Fermi Level Pinning

10.26434/chemrxiv.7110788 ◽

2018 ◽

Author(s):

Kun Wang ◽

Andrea Vezzoli ◽

Iain Grace ◽

Maeve McLaughlin ◽

Richard Nichols ◽

...

Keyword(s):

Charge Transfer ◽

Single Molecule ◽

Quantum Interference ◽

Transmission Function ◽

Scanning Tunneling ◽

Charge Transfer Complexes ◽

Tunneling Microscopy ◽

Quantum Interference Effect ◽

Single Molecule Junctions ◽

Charge Transfer Complexation

We have used scanning tunneling microscopy to create and study single molecule junctions with thioether-terminated oligothiophene molecules. We find that the conductance of these junctions increases upon formation of charge transfer complexes of the molecules with tetracyanoethene, and that the extent of the conductance increase is greater the longer is the oligothiophene, i.e. the lower is the conductance of the uncomplexed molecule in the junction. We use non-equilibrium Green's function transport calculations to explore the reasons for this theoretically, and find that new resonances appear in the transmission function, pinned close to the Fermi energy of the contacts, as a consequence of the charge transfer interaction. This is an example of a room temperature quantum interference effect, which in this case boosts junction conductance in contrast to earlier observations of QI that result in diminished conductance.<br>

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Dioxastilbenophanes—synthesis and charge transfer complexation studies

Tetrahedron ◽

10.1016/j.tet.2004.01.008 ◽

2004 ◽

Vol 60 (10) ◽

pp. 2351-2360 ◽

Cited By ~ 21

Author(s):

Perumal Rajakumar ◽

Venghatraghavan Murali

Keyword(s):

Charge Transfer ◽

Complexation Studies ◽

Charge Transfer Complexation

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The role of sulfur d-orbitals in the charge-transfer complexation of carbonyl cyanide with alkyl sulfides

Tetrahedron ◽

10.1016/0040-4020(76)85007-7 ◽

1976 ◽

Vol 32 (12) ◽

pp. 1345-1346 ◽

Cited By ~ 3

Author(s):

T. Fueno ◽

Y. Yonezawa

Keyword(s):

Charge Transfer ◽

Carbonyl Cyanide ◽

Charge Transfer Complexation ◽

D Orbitals

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Gas phase interaction with catalytic oxidation reactions

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1972.0006 ◽

1972 ◽

Vol 326 (1565) ◽

pp. 215-227 ◽

Cited By ~ 7

Keyword(s):

Carbon Dioxide ◽

Maleic Anhydride ◽

Catalytic Oxidation ◽

Gas Phase ◽

Major Part ◽

Oxidation Reactions ◽

Mixed Gas ◽

Kinetics Of ◽

Oxidation Of Benzene ◽

Homogeneous Decomposition

Studies of the catalytic oxidation of benzene to maleic anhydride and carbon dioxide over vanadia/molybdena catalysts show that the major part of the reaction involves interacting gas and gas-solid processes. The results are consistent with a mechanism in which a benzeneoxygen adduct is formed catalytically, desorbs and then reacts to give maleic anhydride entirely in the gas phase. On the basis of this proposed mechanism, the kinetics of individual reactions have been investigated in some depth. The over-oxidation of maleic anhydride has been found to be not significant under the conditions of reaction. The kinetic relationships governing the homogeneous decomposition of the adduct and the oxidation of the adduct to maleic anhydride and to carbon dioxide have been established. The results show that essentially all of the anhydride originates from mixed gas-solid/gas reaction while substantial amounts of carbon dioxide are produced entirely catalytically.

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