Role of Organic Modifiers

Organic bases such as tetraalkylammonium hydroxides, tertiary amines, and phosphines [46,49,52-54] were employed as additives to improve the activity and selectivity of platinum catalysts in the oxidation of L-sorbose to 2-keto-L-gulonic acid (2-KLG). Rate acceleration was attributed to a beneficial effect of the amine on the hydration of the intermediate aldehyde. The selectivity enhancement obtained with hexamethylenetetramine (HMTA) was attributed to a steric effect involving a complex between HMTA and L-sorbose via hydrogen bonding [52] (see Section 9.3.3.2). [Pg.495]

Tanaka, N., Goodeh, H., Karger, B.L. (1978). The role of organic modifiers on polar group selectivity in reversed-phase hquid chromatography. J. Chromatogr. 158, 233-248. [Pg.175]

McCormick, R.M. and Karger, B.L. (1980) Role of organic modifier sorption on retention phenomena in reversed-phase liquid chromatography. J. Chromatogr. IW, 259-273. [Pg.77]

Kord, A.S. Khaledi, M.G. Controlling solvent strength and selectivity in MLC Role of organic modifiers and micelles. Anal. Chem. 1992, 64, 1894-1900. [Pg.814]

Ray, S. S., Pouliot, S., Bousmina, M., and Utracki, L. A. 2004. Role of organically modified layered silicate as an active interfacial modifier in immiscible polystyrene/polypropylene blends. Polymer 45 8403-8413. [Pg.47]

A.S. Kord and M.G. Khaledi, Controlling Solvent Strength and Selectivity in MLC Role of Organic Modifiers and Micelles, Anal Chem., 64 1894 (1992). [Pg.77]

The role of organically modified layered silicate in the breakup and coalescence of droplets in PBT/PE blends. Polymer, 47, 3967. [Pg.390]

Big Chemical Encyclopedia