Iminothioindoxyl as a molecular photoswitch with 100 nm band separation in the visible range
Iminothioindoxyl as a molecular photoswitch with 100 nm band separation in the visible range
复制标题
DOI：
10.1038/s41467-019-10251-8
复制
发表时间：
2019-06-03
影响因子：
16.6
通讯作者：
Szymanski, Wiktor
中科院分区：
文献类型：
--
作者：
Hoorens, Mark W. H.;Medved, Miroslav;Szymanski, Wiktor
光是一种特殊的外部刺激，用于建立对化学和生物系统的性质和功能的精确控制，这是通过使用分子光开关实现的。理想的光开关仅在可见光下工作，显示出大的吸收带分离，并且在包括水在内的各种溶剂中起作用，这构成了一个未满足的挑战。在这里，我们展示了一类完全可见光操作的分子光开关，亚氨基硫代吲哚氧基（ITIs），满足这些要求。ITIs显示出超过100 nm的带分离，在皮秒时间尺度上异构化，在毫秒时间尺度上热弛豫。使用先进的光谱和计算技术相结合，我们提供了ITIs的开关行为和结构修改和环境，包括水溶液，对它们的光化学性质的影响的基本原理。这项研究铺平了道路，为各种各样的应用程序，需要快速响应功能的改进的光控系统的发展。
Light is an exceptional external stimulus for establishing precise control over the properties and functions of chemical and biological systems, which is enabled through the use of molecular photoswitches. Ideal photoswitches are operated with visible light only, show large separation of absorption bands and are functional in various solvents including water, posing an unmet challenge. Here we show a class of fully-visible-light-operated molecular photoswitches, lminothioindoxyls (ITIs) that meet these requirements. ITIs show a band separation of over 100 nm, isomerize on picosecond time scale and thermally relax on millisecond time scale. Using a combination of advanced spectroscopic and computational techniques, we provide the rationale for the switching behavior of ITIs and the influence of structural modifications and environment, including aqueous solution, on their photochemical properties. This research paves the way for the development of improved photo-controlled systems for a wide variety of applications that require fast responsive functions.