Polyurethanes prepared from non-linear optical active diols (NLO-diols) of the formula according to claim 1, of which the essence is that they have a delocalized π electron system to which both an electron donor group and an electron acceptor group are coupled directly (DπA system). The polyurethanes have high hyperpolarizability densities and other favourable properties and can be easily prepared. They are to be used in optical waveguides.
根据权利要求 1 所述式子的非线性光学活性二元醇(NLO-二元醇)制备的聚
氨酯,其实质是它们具有一个电子供体基团和电子受体基团直接耦合的脱局域 π 电子系统(DπA 系统)。这种聚
氨酯具有较高的超极化密度和其他有利特性,而且易于制备。它们将用于光波导。