Syntheses and quadratic nonlinear optical properties of 2,7-fluorenylene- and 1,4-phenylene-functionalized <i>o</i>-carboranes
作者:Peng Jiang、Zhaojin Wang、Graeme J. Moxey、Mahbod Morshedi、Adam Barlow、Genmiao Wang、Cristóbal Quintana、Chi Zhang、Marie P. Cifuentes、Mark G. Humphrey
DOI:10.1039/c9dt02645b
日期:——
and in many cases structurally characterized. Diphenylamino-containing examples coupled via the two π-delocalizable bridges to the electron-accepting o-carborane unit exhibit the greater quadratic optical nonlinearities at 1064 nm (hyper-Rayleigh scattering, ns pulses), the nonlinearities also increasing on proceeding from 1,4-phenylene- to 2,7-fluorenylene-containing bridge. The most NLO-efficient
由(4-取代的苯基-1-基)乙炔基-1,4-苯基或(2-取代的芴-7-基)乙炔基-2,7-芴基官能化的邻-甲硼烷C,其中侧链官能化是吸电子的硝基或给电子的二苯基氨基,已经合成并且在许多情况下具有结构特征。通过两个π可离域的桥耦合到电子接受的邻碳戊烷单元的含二苯氨基的例子在1064 nm处表现出更大的二次光学非线性(超瑞利散射,ns脉冲),非线性也从1,4开始增加-亚苯基-至含2,7-亚芴基的桥。NLO最有效的示例2-(n-丁基)-1-(2-(((9,9-di(n-丁基)-2-(N,N-二苯氨基)-9 H-芴-7-基)乙炔基)-9,9-二(正丁基)-9 H-芴-7-基)-1,2 -由二苯基氨基供体,含芴基的桥基,邻-碳硼烷受体和可溶的正丁基单元组成的邻-碳硼烷表现出大的< β > HRS(230×10 -30 esu)和频率无关的(两级模型) )< β 0 >(96×10 -30 ESU)的值。偶合两个(2-((9