Insertion of Copper(II)/Schiff‐Base Complexes with NLO Properties into Commercial Polycarbonates by Thermal Processes

Abstract

The preparation of a bisphenol‐A carbonate copolymer, containing Cu‐diimine units with nonlinear optical (NLO) properties, and its MALDI‐TOF mass spectrometric characterization are reported. Contrary to the usual synthetic method, NLO groups were inserted directly into a commercial polycarbonate by prolonged heating at 250 °C. This innovative procedure allows to obtain a Cu/diimine‐containing polymer of high molecular weight. magnified image

Synthesis and matrix‐assisted laser desorption/ionization time‐of‐flight characterization of bisphenol‐A copolyformals containing nickel(II)/Schiff base, eicosane and 2‐butene units in the main chain

“…1 To obtain high-performance materials, several attempts to bind this chromophore into polymeric molecules have recently been made. 2 In principle, for second-order NLO applications, the chromophore units embedded in the polymer mass must be oriented (poling processes under strong electric fields) and maintain their orientation with time. Both the alignment and the durability, though in a different manner, depend on the glass transition temperature (Tg) (due to the segmental mobility) of the polymeric material 3 so that a low Tg value can facilitate the poling process.…”