Styryl pyridinium

Photocrosslinking. The second class of photopolymer chemistry that is used in some commercial products is based on the reaction of unsaturated moieties attached to an organic polymer. These photopolymer materials include the [2+2] cycloaddition of the ethylenic groups in poly(vinyl cinnamate) polymers and in the newer styryl pyridinium (10) and thiazolium (77) derivatives of poly(vinyl alcohol). The main advantage of this chemistry is that, unlike free-radical photopolymerization, they are insensitive to the presence of oxygen. This photopolymer mechanism is principally used in applications employing a washout development process (e.g. resists). 

Spectroscopic methods can be used to specify the position of donors and acceptors before photoexcitation [50]. This spatial arrangement can obviously influence the equilibrium eomplexation in charge transfer complexes, and hence, the optical transitions accessible to such species [51]. This ordered environment also allows for effective separation of a sensitizing dye from the location of subsequent chemical reactions [52], For example, the efficiency of cis-trans isomerization of A -methyl-4-(p-styryl)pyridinium halides via electron transfer sensitization by Ru(bpy) + was markedly enhanced in the presence of anionic surfactants (about 100-fold) [53], The authors postulate the operation of an electron-relay chain on the anionic surface for the sensitization of ions attached electrostatically. High adsorptivity of the salt on the anionic micelle could also be adduced from salt effects [53, 54]. The micellar order also influenced the attainable electron transfer rates for intramolecular and intermolecular reactions of analogous molecules (pyrene-viologen and pyrene-ferrocene) solubilized within a cationic micelle because the difference in location of the solubilized substances affects the effective distance separating the units [55]. 

Acetylcholineesterase and choline oxidase Prepared by mounting a carbon fiber (200 pm diam) in a glass capillary with silver paste and epoxy resin, electrochemically pretreating the electrode from 0 to 1.2 V for 15 min, and dipping the electrode in 11% PVA-Styryl pyridinium solution containing AChE and ChO. The calibration graph was rectilinear from 0.2 to 1 mM of ACh. The response time was 0.8 min. [76]... 

Acetylcholineesterase and choline oxidase Enzyme membrane in H20 was treated with 11% solution of PVA-SbQ (polyvinyl alcohol) with styryl pyridinium groups. Mixture was spread on a cellulose nitrate membrane and air dried. The membrane was exposed to UV radiation for 3 h and stored at 4°C. The enzyme membrane was fixed with a Pt electrode. Sample was dissolved in phosphate buffer and measured. The best results were obtained at pH 8 and at 30°. The calibration graph was rectilinear for 5mM ACh. The storage stability of the dry membrane was excellent. [77]... 

Ethyl-2,6-bis[4-(pyrrolidin-1 -yl)styryl]pyridinium iodide C3,H36lN3 = 577.6 CAS—3784-99-4... 

Antonious, M. S. Mahmoud, M. R. Guirguis, D. B. Solvent polarity indicators mass spectral properties of some styryl pyridinium and quinolinium salts. Am. Chim. 1993, 83, 457 60. 

De Proost, L Pintelon, I. Brouns, L Timmermans, J. P. Adriaensen, D. Selective visualization of sensory receptors in the smooth muscle layer of ex-vivo airway whole-mounts by styryl pyridinium dyes. Cell Tissue Res. 2007, 329, 421-431. 

Nurse, C. A. Farraway, L. Characterization of Merkel cells and mechanosensory axons of the rat by styryl pyridinium dyes. Cell Tissue Res. 1989, 255, 125-128. 

Other Names 4-[p-(Dimethylamino)styryl]-l-methylpyridinium iodide Pyridinium, 4-[2-[4-(dimethylamino)phenyl]ethenyl]-l-methyl-, iodide Pyridinium, 4-[p-(dimethylamino)styryl]-l-methyl-, iodide 1-Methyl 4-(4-dimethylamino styryl) pyridinium iodide 4- [2- [4-(Dimethylamino)phenyl] -ethenyl]-1 -... 

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