13222-17-8Relevant academic research and scientific papers
HIGH REFRACTIVE INDEX MONOMERS, COMPOSITIONS AND USES THEREOF
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Page/Page column 33, (2008/12/08)
The invention relates to novel sulfur-containing (meth)acrylic monomers and compositions thereof characterized by a high refractive index, for optical and industrial applications. The invention also relates to a method for preparing high refractive index polymeric materials and more specifically to a method for formation of ultraviolet cast optical lenses and compositions thereof comprising the sulfur-containing (meth)acrylic monomers.
Molecular recognition of β-ribofuranosides by synthetic polypyridine-macrocyclic receptors
Inouye, Masahiko,Miyake, Toshiyuki,Furusyo, Masaru,Nakazumi, Hiroyuki
, p. 12416 - 12425 (2007/10/03)
Artificial ribofuranoside receptors were designed and synthesized. The design of the polypyridine-macrocyclic receptors was based on the multipoint hydrogen bond complementarity between the receptors and methyl β-D-ribofuranoside. The binding affinity of the receptors for the ribofuranoside in CDCl3 was very high (up to K(a) = 5.2 x 103 M-1), so that even native ribose was extracted by them into such nonpolar solvents. Selective extraction of ribose by the receptors was observed: the extractabilities, or affinities to the receptors of various pentoses and hexoses decreased in the following order: ribose > deoxyribose ? lyxose ? xylose > fructose > arabinose > glucose ? mannose ? galactose. The selectivity is governed by the OH direction and the whole size of the sugars as well as their shapes. Furthermore, fluorescence emission of the receptors was largely enhanced in the presence of methyl β-D-ribofuranoside or ribose, and the degree for the fluorescence enhancement by the addition of various sugars was almost compatible with that of the extractabilities. The polypyridine-macrocycles represent rationally designed multifunctional artificial receptors for ribofuranosides.
KINETICS OF HYDROLYSIS OF AROMATIC BICYCLING DISULFONYL DICHLORIDES
Sanecki, Przemyslaw,Rokaszewski, Edward
, p. 3056 - 3059 (2007/10/02)
Hydrolysis of 16 compounds ClO2S-Ar-B-Ar-SO2Cl (B, bridge) in 20percent H2O, 80percent v/v CH3CO2H, 0.5 mol dm-3 CH3CO2Na at 298.15 K has been investigated by a polarographic method.From plots of the hydrolysis, pseudo-first-order rate constants for two consecutive reactions have been computed and the influence of -SO2Cl groups, bridges B, and SO3(1-) groups on the reactivity of -SO2Cl groups has been discussed.The ratio of rate constants k2/k1 ranges from 0.45 to 30, depending on the structure.Log (k1/(2kH)) correlated linearly with ? m,p -B-C6H5 and log (k2/k1) correlated linearly with ΔpK for the analogous diamine series H2N-Ar-B-Ar-NH2.
