Polyelectrolyte ionically tethered

Investigation of the Behavior of End-Tethered Weak Polyelectrolytes in Ionic Solutions Using Grafting Density Gradients... 

Lovrien and Waddington [16] have prepared polymeric dyes which are, in fact, photochromic macromolecules. These were compared with the analogous free dyes and to bound dyes. The tethered dyes (photoisomerization) photo response and dark relaxation are influenced by the conformation of the polyelectrolyte. Fuoss has shown earlier that the solution viscosity aqueous polyelectrolytes could be altered by the addition of common ions. The same is known for other ionic polymers. 

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