2-propyl sulfonates

Ion exchange chromatography. Samples were fractionated on SP Sephadex C25 (34 X 2.6 cm), a strong cation exchange medium containing propyl-sulfonate groups. 

The effect of carboxylate and/or sulfonate ion incorporation on the physical and blood contacting properties of polyurethanes was studied by Cooper and collaborators [476-478]. Specifically, propyl sulfonate and ethyl carboxylate groups were grafted onto polytetramethylene oxide-based polyurethanes. Carboxylate polymers had no statistically significant effect on canine ex vivo blood contact response, but propyl sulfonate incorporation significantly reduced platelet deposition for very short blood contact times. 

Vleasurement did not go any mote negative. fEthyl-/so-propyl sulfone. 

The solvolysis mechanisms of 2,2-dimethyl-3-pentyl- and l-(l-adamantyl)-propyl sulfonates appeal- to involve partial reversible ionization to the ultimate ion pair followed by competing elimination and solvent separation, substitution products being formed from the separated ions.27 The lifetimes of simple tertiary carbocations may be some 100 times shorter than previously thought several 3-(4-methoxyphenyl)-l,l-dimethylpropyl species hydrolyse in 50% aqueous TFE with rate constants estimated at some 3.5 x 1012 s-1.28 Much elimination was also observed.28 Two studies concerning proposed carbocation intermediates in enzymatic processes are reported.29,30... 

Propyl sulfonic acid Si-O-Si-C -CH2CH2CH2-SOiNa+ Ion exchange Strong cation exchange substrate for aqueous and biological samples effective for the separation of weaker cations such as pyridinium compounds... 

Propyl sulfonic acid Ion exchange/normal-phase/reversed-phase... 

See also the special structure of a-lithiocyclo-propyl sulfones. l.c.36. 

Figure 4. Schematic representation of a cross-linked polysiloxane structure formed by copolycondensation of tetraalkoxysilane, propyltrialkoxysilane and 3-(tris-hydroxy-silyl)propyl sulfonic acid. Note the embedding of the functionalized. siloxanes into the matrix in contrast with simple attachment to the surface of a preformed solid.

Sandoterte. [Sandoz] Anq>h(Aydroxy-propyl sulfonates extremely n surfactant producing synergistic vise, in-... 

Processable PAA/PANI-NF and poly(2-acrylamido-2-methyl propyl-sulfonic acid-acrylic acid)/PANI-NF conducting hydrogels with an interpenetrating polymer network structure have recently been synthesized [456]. 

Propyl sulfonic acid -CH2.CH2.CH2 Si-O-Si-C Weak anion exchange sorbent Can be used with weaker cations Can be used with biological and other aqueous samples... 

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