ole and n is 1.128wherein R and R' are CH3 ; R is H and R' is OCH3 ; R is H and R' is Cl; R is H and R is COOH or R is H and R' is NO2 ; and wherein M is a divalent metal ion and n is 1, or M is a trivalent metal ion and n is 2.129wherein R and R' are F: R is H and R' is O(CH2 CH2 O)2 CH3 ;R is H and R' is SO3- ; or R is H and R' is CO2- and M is a divalent metal ion and n is 1 or M is a trivalent