100779-91-7Relevant articles and documents
Synthesis and spectroscopic characterization of a fluorescent pyrrole derivative containing electron acceptor and donor groups
Almeida,Monteiro,Dias,Omena,Da Silva,Tonholo,Mortimer,Navarro,Jacinto,Ribeiro,De Oliveira
, p. 812 - 818 (2014)
The synthesis and fluorescence characterization of a new pyrrole derivative (PyPDG) containing the electron donor-acceptor dansyl substituent is reported. The effects of temperature and solvent polarity on the steady-state fluorescence of this compound are investigated. Our results show that PyPDG exhibits desirable fluorescent properties which makes it a promising candidate to be used as the photoactive material in optical thermometry and thermography applications. Further, the electrochemical and emission properties of polymeric films obtained from the oxidation polymerization of PyPDG are also analyzed.
Viologen(2+/1+) and Viologen(1+/0) Electron-Self-Exchange Reactions in a Redox Polymer
Dalton, E. F.,Murray, Royce W.
, p. 6383 - 6389 (1991)
A analysis is given of the electron-self-exchange reactions responsible for the steady-state redox conductivity of thin films of the electropolymerized monomer N,N'-bis(3-pyrrol-1-yl-propyl)-4,4'-bipyridinium tetrafluoroborate, sandwiched between two electrodes.Concentration-gradient-driven electron self-exchange in the liquid-acetonitrile-bathed viologen(2+/1+) mixed-valent state of this polymer, kex = 8 x 103 M-1 s-1, is much slower than that for the viologen (1+/0) mixed valent-state, kex = 1.6 x 105 M-1 s-1, which has a smaller activation barrier.Neither self-exchange reaction responds to use of alternative counterions except that both rates decrease in polymer containing tosylate counterions.The rate constant found for the electrical-gradient-driven viologen (1+/0) electron self-exchange, kex = 1.1 x 105 M-1 s-1, observed in dry, N2-bathed polymer where ClO4(1-) counterion mobility is quenched, is nearly the same as the acetonitrile-bathed value.The rate constants appear to be dominated by characteristics of the polymer phase rather than the bathing environment of the polymer.Estimates are made of the counteranion diffusivity in acetonitrile-bathed films and of how it affects transient electron transport measurements.
Electropolymerized biotinylated poly (pyrrole-viologen) film as platform for the development of reagentless impedimetric immunosensors
Gondran, Chantal,Orio, Maylis,Rigal, David,Galland, Bruno,Bouffier, Laurent,Gulon, Tioga,Cosnier, Serge
, p. 311 - 314 (2010)
We describe herein the synthesis and electrochemical polymerization of a viologen monomer functionalized by a biotin group and the use of its redox properties for the impedimetric sensing of protein binding. The electrochemical oxidation of the pyrrole group at 0.85 V in CH3CN led to a biotinylated polypyrrole film allowing the successive anchoring of an avidin layer and a biotinylated cholera toxin layer. EIS performed at -0.45 V/SCE without redox probe in solution showed the specific immobilization of the anti-cholera toxin antibody.
A nitrite biosensor based on a maltose binding protein nitrite reductase fusion immobilized on an electropolymerized film of a pyrrole-derived bipyridinium
Wu,Storrier,Pariente,Wang,Shapleig,Abruna
, p. 4856 - 4863 (1997)
The preparation and electrochemical characterization of glassy carbon electrodes (GCEs) modified with electropolymerized films of the cation N-(3-pyrrol-1-yl-propyl)-4,4′-bipyridine (PPB) are described. The behavior of a new biosensor, which exhibits a high catalytic activity for nitrite reduction and which consists of a maltose binding protein nitrite reductase fusion (MBP-Nir) immobilized on an electropolymerized film of PPB as an electrocatalyst, is also described. The insoluble perchlorate salt of the poly(benzjl viologen) dication was used to immobilize MBP-Nir onto an electrode previously modified with an electropolymerized film of PPB. The electropolymerized film of PPB on the GCE is redox active and exhibits special electron-transfer properties toward the MBP-Nir layer but not toward Nir (Nir without MBP fusion attached), suggesting an intimate interaction between the PPB film and the MBP-Nir layer. The kinetics of the catalytic reaction between the biosensor and nitrite anion were characterized using cyclic voltammetry and rotated disk electrode techniques, and a value of (4.6 ± 0.5) × 103 M-1 s-1 was obtained for the rate constant.
FLAVIN DERIVATIVES
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Page/Page column 205-206, (2011/02/24)
The present invention relates novel flavin derivatives and other flavin derivatives, their use and compositions for use as riboswitch ligands and/or anti-infectives. The invention also provides method of making novel flavin derivatives.