Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Jack L R Williams"'
Autor:
Jack L R Williams, M.E. Glogowski
Publikováno v:
Journal of Organometallic Chemistry. 218:137-146
The ratio of methyl group rearrangement to methyl group elimination during the photocyclization of anilinodimesitylborane is dependent upon the concentration of iodine present. At iodine concentrations of less than 10 −3 M , the major product is a
Publikováno v:
Journal of the American Chemical Society. 97:3697-3702
Autor:
Jack L R Williams, Douglas G Borden
Publikováno v:
Die Makromolekulare Chemie. 178:3035-3049
Styrylpyridinium substituted vinyl polymers (6), which are in effect polymeric dyes, may easily be prepared by condensing poly[1-(1,6-dimethylpyridinium-3-yl)ethylene methyl sulfate] (3) with various aromatic aldehydes (5) using piperidine as catalys
Publikováno v:
Journal of Polymer Science: Polymer Chemistry Edition. 21:2473-2490
Pyrene substituents covalently bounded to polyelectrolytes show not only excited-state interactions but also unique ground-state interactions in aqueous solution. The pyrene moieties in pyrenesubstituted ionic molecules also show these interactions w
Publikováno v:
Journal of Organometallic Chemistry. 231:97-107
The UV-visible spectral shifts observed from p-dimesitylboryl-containing dyes in alcohol/sodium hydroxide solutions are caused by attack of the base on the boron atom. This attack produces the light-sensitive, tetravalent, “aterd structure. Dyes ha
Publikováno v:
Journal of Polymer Science: Polymer Letters Edition. 17:305-308
Autor:
Samir Farid, R. Searle, Jack L R Williams, Donald P. Specht, R. C. Daly, D. G. Borden, J. C. Doty, H. J. Chang, P. A. Martic
Publikováno v:
Pure and Applied Chemistry. 49:523-538
The use of polymers in photoreactive imaging systems depends upon the interrelationship between the polymer physical properties and the photosensitive response. Modifications of the structure and physical properties by synthetic means permit control
Autor:
Jack L R Williams, Douglas G Borden
Publikováno v:
Die Makromolekulare Chemie. 73:203-214
The preparation and properties of a group of light-sensitive polymers formed from poly(vinyl sulfonates) quaternized with 4-picoline and allowed to react with various aldehydes, especially anisaldehyde and 2-furaldehyde, are discussed. The polymers a
Publikováno v:
The Journal of Organic Chemistry. 28:1317-1320
Publikováno v:
Journal of Polymer Science. 4:583-595
The polymers of 2-ethyl-, 2-isopropyl-, and 2-n-amyl-1,3-butadiene alone, and their copolymers with styrene and with butadiene have been prepared and characterized. These monomers give the same ratio of 1,2 to 1,4 addition as has been noted for isopr