Synthesis of novel pseudo‐Fréchet‐type dendrons and their fluorescent enhancement to Eu 3+ ion

Novel pseudo‐Fréchet‐type dendrons with 1,3,5‐triazine structure G1.0(NOT) and G2.0(NOT) were synthesized under mild conditions by cyanuric chloride, β‐naphthol, and 3,5‐dihydroxybenzyl alcohol with the yields of 96.3 and 85.6%. The structure of the dendrons was characterized by elementary analysis, IR spectrum, 1 H‐NMR, and FAB‐MS. The dendrons had good thermo stability and solubility. They could partially transfer their absorbed energy to Eu 3+ ion in tetrahydrofuran/acetone solutions. When the concentration of G1.0(NOT), G2.0(NOT), and Eu 3+ ion was 5 × 10 −4 mol/L, G1.0(NOT) could enhance the fluorescent intensity of Eu 3+ ion at 613 nm by 4.2‐fold, whereas G2.0(NOT) could enhance the fluorescent intensity of Eu 3+ ion at 465 and 613 nm by 18.6‐ and 11.7‐fold, respectively. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009