Science. 1994 Jan 28;263(5146):511-4. doi: 10.1126/science.263.5146.511.
Conjugated organic compounds with 3-phenyl-5-isoxazolone or N,N'-diethylthiobarbituric acid acceptors have large first molecular hyperpolarizabilities (beta) in comparison with compounds with 4-nitrophenyl acceptors. For example, julolidinyl-(CH=CH)(3)-CH=N,N'- diethylthiobarbituric acid, which has 12 atoms between the donor and acceptor, has a beta(0) of 911 x 10(-30) electrostatic units, whereas (CH(3))(2)NC(6)H(4),-(CH=CH)(4)-C(6)H(4)NO(2), with 16 atoms between its donor and acceptor, has a beta(0) of 133 x 10(-30) electrostatic units. The design strategies demonstrated here have resulted in chromophores that when incorporated into poled-polymer electrooptic modulators exhibited significant enhancements in electrooptic coefficients relative to polymers containing the commonly used dye Disperse Red-1. Poled polymer devices based on these or related chromophores may ultimately lead to high-speed electrooptic switching elements with low drive-power requirements, suitable for telecommunications applications.
具有 3-苯基-5-异恶唑啉或 N,N'-二乙基硫代巴比妥酸受体的共轭有机化合物与具有 4-硝基苯受体的化合物相比，具有较大的第一分子超极化率 (β)。例如，具有 12 个供体和受体之间原子的 julolidinyl-(CH=CH)(3)-CH=N,N'-二乙基硫代巴比妥酸，具有 911 x 10(-30)静电单位的β(0)，而 (CH(3))(2)NC(6)H(4),-(CH=CH)(4)-C(6)H(4)NO(2)，其供体和受体之间有 16 个原子，具有 133 x 10(-30)静电单位的β(0)。这里展示的设计策略导致了生色团，当将其掺入极化聚合物电光调制器中时，与包含常用染料 Disperse Red-1 的聚合物相比，电光系数得到了显著提高。基于这些或相关生色团的极化聚合物器件最终可能导致具有低驱动功率要求的高速电光开关元件，适用于电信应用。
