Conformation and transport properties of poly(alkylene phosphate)—A synthetic analogue of natural teichoic acids—I. Hypercoiled to extended coil state transition in poly(1,3-propylene phosphate)

Abstract

The pH-induced conformational transition of poly(1,3-propylene phosphate) (PPP) in an aqueous solution has been investigated by the potentiometric method. It has been found that PPP undergoes a cooperative macroconformational transition upon changing the fraction of dissociated phosphate groups from 0.3 to 0.4. The standard free energy for the transition from a hypothetical hypercoiled form to a loosely coiled form was estimated to be 565 J/mol.