lambda (2)(max)and Phidelta(max) have been optimized by introducing donor-substituted styryl groups at the 2,6-positions and p-cyanophenyl groups at the 9,10-positions, respectively. The effect of a pi center on the two-photon absorption properties has been assessed by comparing the existing data for a variety of D-pi-D derivatives.
合成了一系列2,6-和2,7-双(
苯乙烯基)
蒽衍
生物,其
苯乙烯基上的供体和9,10位上的受体,以及它们的两个光子截面(Phidelta(max) )确定。这些化合物在780-1030 nm处的700-2500 GM范围内表现出峰值的两个光子吸收率(delta(max))。随着受体变为更强的受体,lambda(max)和Stokes shifts的值会增加。在发色团结构相同的情况下,lambda(2)max和delta(max)也平行增加。通过分别在2,6-位引入供体取代的
苯乙烯基和在9,10位引入对
氰基苯基,可以优化λ(2)(max)和Phidelta(max)。