Polymer supported reagents especially anion exchange resins have been widely applied in organic synthesis. The recent developments in polymer-supported reactions have led to the propagation of combinatorial chemistry as a method for the rapid and efficient preparation of novel functionalized molecules. An interesting and fast growing branch of this area is polymer-supported reagents. In this study, diazonium salts are generated and are coupled with a coupling component by using a polymer supported nitrite and a polymeric acid. In this procedure, the azo chromophores are formed in a clean and efficient manner, the work-up is easy and yields are high to excellent. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 120: 538-543, 2011