1518-16-7Relevant articles and documents
Hosaka et al.
, p. 2616 (1971)
MECHANISM OF THE HYDRIDE TRANSFER REACTION OF LEUCO CRYSTAL VIOLET WITH CYANOMETHYLENE ACCEPTORS
Nishimura, Norio,Zaman, Khan M.,Yamamoto, Shunzo
, p. 218 - 220 (1994)
In the hydride transfer reaction of Leuco Crystal Violet to form the Crystal Violet cation, the role of cyanomethylene acceptors was found to be essentially different from that of p-benzoquinones, both previously believed to act as ?-acceptors in the same manner.
Acker et al.
, p. 6408 (1960)
Boyd
, p. 2529,2531, 2533 (1963)
Microelectrochemical measurements of electron transfer rates at the interface between two immiscible electrolyte solutions: Potential dependence of the ferro/ferricyanide-7,7,8,8-tetracyanoquinodimethane (TCNQ)/TCNQ?- system
Unwin,Zhang
, p. 3820 - 3827 (2002)
The reduction of 7,7,8,8-tetracyanoquinodimethane (TCNQ) in 1,2-dichloromethane (DCE) and nitrobenzene (NB), by aqueous ferrocyanide, and the back reaction were studied by scanning electrochemical microscopy. The effect of galvanic potential at the interface between two immiscible electrolyte solutions (ITIES) on electron transfer (ET) rates, with different electrolyte concentrations in the organic phase was evaluated. The ET rate constants for the forward and back reaction depended strongly on the interfacial potential drop, with an apparent ET coefficient close to 0.5. TCNQ?- was confined to DCE, but transferred from NB to water under certain experimental conditions, which could complicate kinetic analysis. The ET kinetics for the water/DCE system were analyzed further using Marcus theory. Close to zero driving force, the rate constants for the forward and back reaction were similar and in good agreement with predictions from Marcus theory with a sharp liquid/liquid interface. At equilibrium (when the forward and back ET rate constants were equal), the sharp boundary model for the ITIES predicted a bimolecular rate constant close to that measured experimentally.
Electrically conducting TCNQ Derivatives of Copper Sulphur/Nitrogen Chelates; Structure of a Novel Semiconducting Complex 2 which contains N-bonded TCNQ (pdto=1,8-di-2-pyridyl-3,6-dithiaoctane; TCNQ=7,7,8,8-tetracyanoquinodimethane)
Humphrey, David G.,Fallon, Gary D.,Murray, Keith S.
, p. 1356 - 1358 (1988)
Reaction in water of Cu(pdto)(ClO4)2 with Li(TCNQ)/TCNQ mixtures yields solid crystalline materials of formulae Cu(pdto)(TCNQ)x (x=2, 2.5, or 3) which display high electrical conductivities ; reaction of Cu(pdto)(ClO4) with Li(TCNQ) yields Cu(pdto)(TCNQ), a poor conductor which has been shown by X-ray crystallography to have a novel dimeric structure involving ?-? interaction between TCNQ units and which possesses Cu-TCNQ bonding.
Positive dendritic effects on the electron-donating potencies of poly(propylene imine) dendrimers
Ong, Winston,McCarley, Robin L.
, p. 1287 - 1290 (2005)
(Chemical Equation Presented) Two series of poly(propylene imine), PPI, dendrimers terminated with a redox-active donor, 4-dimethylaminobenzyl (4-DMAB), including their respective nondendronized model compounds, are reported. In these two series, a positive dendritic effect was observed for the formation of charge-transfer (CT) complexes between the dendrimers and 7,7,8,8- tetracyanoquinodimethane (TCNQ). However, the nondendronized compounds did not form CT complexes with TCNQ, even though their redox potentials are similar to those of the 4-DMAB units attached to the dendrimers.
Spectroscopic and thermal investigations on the charge transfer interaction between risperidone as a schizophrenia drug with some traditional π-acceptors: Part 2
El-Habeeb, Abeer A.,Al-Saif, Foziah A.,Refat, Moamen S.
, p. 464 - 477 (2013/04/23)
The focus of present investigation was to assess the utility of non-expensive techniques in the evaluation of risperidone (Ris) in solid and solution states with different traditional π-acceptors and subsequent incorporation of the analytical determination into pharmaceutical formulation for a faster release of risperidone. Charge-transfer complexes (CTC) of risperidone with picric acid (PA), 2,3-dichloro-5,6-dicyano-p-benzoquinon (DDQ), tetracyanoquinodimethane (TCNQ), tetracyano ethylene (TCNE), tetrabromo-p-quinon (BL) and tetrachloro-p-quinon (CL) have been studied spectrophotometrically in absolute methanol at room temperature. The stoichiometries of the complexes were found to be 1:1 ratio by the photometric molar ratio between risperidone and the π-acceptors. The equilibrium constants, molar extinction coefficient (εCT) and spectroscopic-physical parameters (standard free energy (ΔGo), oscillator strength (f), transition dipole moment (μ), resonance energy (RN) and ionization potential (ID)) of the complexes were determined upon the modified Benesi-Hildebrand equation. Risperidone in pure form was applied in this study. The results indicate that the formation constants for the complexes depend on the nature of electron acceptors and donor, and also the spectral studies of the complexes were determined by (infrared, Raman, and 1H NMR) spectra and X-ray powder diffraction (XRD). The most stable mono-protonated form of Ris is characterized by the formation of +NH (pyrimidine ring) intramolecular hydrogen bonded. In the high-wavenumber spectral region ～3400 cm-1, the bands of the +NH stretching vibrations and of the pyrimidine nitrogen atom could be potentially useful to discriminate the investigated forms of Ris. The infrared spectra of both Ris complexes are confirming the participation of +NH pyrimidine ring in the donor-acceptor interaction.
