US 10,606,172 B2  81  82  Quencher 10  Quencher 14  Quencher  11  Quencher 12  Quencher 13  -continued  -continued  Synthesis of Base Polymers (Polymers 1 to 3)  Base polymers were prepared by combining suitable  monomers, effecting copolymerization reaction thereof in  tetrahydrofuran (THF) solvent, pouring the reaction solution  into methanol for crystallization, repeatedly washing with  hexane, isolation, and drying. The resulting polymers, des- ignated Polymers 1 to 3, were analyzed for composition by  $^{1}$H-NMR spectroscopy, and for Mw and Mw/Mn by GPC  versus polystyrene standards using THF solvent.  Synthesis Example  5  0.25  0  0  r  r .10  Mw~7,600  Mw/Mn~ 1.73  Polymer 1 