Using low generation dendrimers as monomers to construct dendronized hyperbranched polymers with high nonlinear optical performance

Abstract

By combining the structure of hyperbranched polymer and dendrimer, two second-order nonlinear optical (NLO) dendronized hyperbranched polymers, PG1 and PG2, were prepared with satisfactory yields through the Suzuki coupling reaction using low generation dendrimers as the monomers. Due to their highly branched structure, both of them have good solubility and processability. These two polymers inherited the advantages of hyperbranched polymers (good stability) and dendrimers (large NLO coefficient) simultaneously, especially for PG1. Its NLO coefficient d₃₃ value and d_33(∞) value were as high as 166 and 27 pm V⁻¹, respectively, and no obvious decay was observed in its d₃₃ value when its thin film was heated to 117 °C.