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(a) Ditopic cationic monomers used for polyacylhydrazone formation. (b) Structures of generated polyacylhydrazones. (c) Structures of polyanionic targets. (d) Surface plasmon resonance (SPR) for binding of poly(1-3) and poly(1-4) to polyadenine at different pH values (▲, pH = 4.5, ⧫; pH = 5; ○ pH = 6). Adapted with permission from ref (31). Copyright 2006 WILEY-VCH Verlag Gmbh & Co. KGaA, Weinheim.
