during photoisomerization although it is formed during the thermal back reaction. Comparing the switching behavior of various dimers, both experimentally and computationally, helped to unravel the crucial role of the bridging moiety connecting both photochromic units. The presented dihydropyrene dimer serves as model system for longer cooperative switching chains, which, in principle, should enable efficient
我们提出了一种实现高度协作光切换的策略,其中初始切换事件极大地促进了相邻单元的后续切换。通过合适的π共轭桥连接供体/受体取代的
二氢芘,与第一次开环相比,第二次光
化学开环过程的量子产率可以提高两个数量级以上。结果,尽管在热回反应期间形成了中间混合开关态,但在光异构化过程中未检测到中间混合开关态。通过实验和计算比较各种二聚体的开关行为,有助于揭示连接两个光致变色单元的桥接部分的关键作用。所提出的
二氢芘二聚体可作为较长协作交换链的模型系统,原则上,该系统应该能够沿着分子定义的路径高效且定向地传递信息。此外,我们的概念允许增强低聚物和聚合物系统及其材料的光敏性。