Synthesis, Characterization, and Application of Poly(N, N′-dibromo-N-ethylnaphthyl-2, 7-disulfonamide) as an Efficient Reagent for the Synthesis of 2-Arylbenzimidazole and 2-Aryl-1-arylmethyl-1H-1, 3-benzimidazole Derivatives. (6th May 2015)