Patent ID: 7943713

Claim:
A polymeric compound of general formula 1, 1A or 4: wherein R 1 and R 5 are each independently selected from H, C 1 to C 6 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted aryl, and a ring containing a heteroatom; R 2 , R 3 , R 6 and R 7 are each independently selected from H, C 1 to C 6 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted aryl, and a ring containing a heteroatom or R 2 and R 3 and/or R 6 and R 7 are together involved in a ring which is optionally substituted; R 8 is H or a C 1 to C 6 branched or non-branched alkyl; Q is selected from C 1 to C 12 branched or non-branched alkyl, substituted or non-substituted cyclic alkyl, substituted or non-substituted phenyl and substituted or non-substituted fused alkyl or phenyl ring, optionally Q bears a cationic group, an anionic group or is a ring including a heteroatom; x, y and z are the numbers of the repeating monomer units and are each independently selected from 0 and a number ≧1; and wherein at least one of the ratio x/(x+y), x/(x+z) and x/(x+y+z) yields a boronic acid content of between 4 and 28% by molar ratio.