OPTICAL SENSOR SYSTEM FOR DETERMINING pH VALUES AND IONIC STRENGTHS

摘要

A copolymer comprising at least one recurring structural unit of formula VII CHEM optionally at least one recurring structural unit of formula VIII CHEM and recurring structural units of formula IX CHEM wherein Rk is hydrogen or methyl, Rm is hydrogen or C1-C12alkyl, phenyl or benzyl, Rn ad Ro are each independently of the other C1-C12alkyl, phenyl or benzyl or Rn and Ro together are tetramethylene, pentamethylene, -(CH2)2-O-(CH2)2- or -(CH2)2-N(C1-C6alkyl)-(CH2)2-, and F is the radical of a fluorophore bonded directly or via a bridge group to the N atom, with the proviso that at least two different recurring structural units of formula VII or at least one structural unit of formula VII and at least one structural unit of formula VIII are present. The copolymers can be used for optical pH sensors.