International Center for Materials Nanoarchitectonics (WPI-MANA) National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan.
Australian Institute for Bioengineering and Nanotechnology (AIBN) The University of Queensland Brisbane QLD 4072 Australia.
Adv Sci (Weinh). 2021 May 16;8(14):2100539. doi: 10.1002/advs.202100539. eCollection 2021 Jul.
Chromism induced by changes in the electronic states of dye molecules due to surface adsorption is termed "adsorchromism" in this article. These changes of molecular electronic states are induced by protonation, aggregation, intramolecular structural changes, and other processes, depending on the surface environment. Intramolecular structural changes, such as co-planarization and decreased molecular motion are the most characteristic and interesting behavior of dye molecules at the surfaces, resulting in spectral shift and/or emission enhancement. In this review, adsorchromism at the surfaces of layered materials are summarized since their flexibility of interlayer distance, surface flatness, and transparency is suitable for a detailed observation. By understanding the relationship between adsorchromism and the electronic states of molecules on the surfaces, it will be possible to induce some desired functions which can be realized simply by adsorption, instead of complicated organic syntheses. Thus, adsorchromism has potential applications such as effective solar energy harvesting systems, or biological/chemical sensors to visualize environmental changes.
本文中，由于表面吸附导致染料分子电子态的变化而引起的变色现象被称为“吸附变色”。这些分子电子态的变化是由质子化、聚集、分子内结构变化等过程引起的，具体取决于表面环境。分子内结构变化，如共面化和分子运动的减少，是染料分子在表面上最具特征和有趣的行为，导致光谱位移和/或发射增强。在这篇综述中，总结了层状材料表面的吸附变色现象，因为它们的层间距离的灵活性、表面平整度和透明度适合进行详细观察。通过了解表面上分子的吸附变色与电子态之间的关系，有可能诱导出一些通过简单吸附就可以实现的理想功能，而无需进行复杂的有机合成。因此，吸附变色具有一些潜在的应用，如有效的太阳能收集系统或生物/化学传感器，可以用来可视化环境变化。
