Salt solutions, aqueous polymer-bearing

PEO dissolves in nonpolar solvents and can adsorb onto mica surface from such solvents (e.g., toluene ). PEO is also a water-soluble polymer and can adsorb onto mica surfaces from KNO3 salt solutions this ability to dissolve in both organic and aqueous solvents led to the widespread use of PEO (or equivalently PEG) as a model polymer for research, as well as in practical systems. The normal forces between mica surfaces bearing PEO were studied long The forces... 

Subsequently, Itsuno s group [38] further disclosed a main-chain-functionalized polymer via a similar strategy. Mixing aqueous solution of bis(quaternary ammonium salt) and disulfonate salts led to the formation of a chiral polymer (18) bearing ionic bonds in the main chain (Figure 4.15). The catalytic ability of this ionic polymer was tested in the benzylation of N-diphenylmethylene glycine tert-butyl ester increased enantioselectivity albeit with lower activity was observed. In addition, the catalyst could be easily recovered and reused without loss of activity and enantioselectivity for three runs. 

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