三重态-三重态湮没上转换(TTA-UC)是一种非常有前途的技术,可用于将低能光子转换为高能光子,并已被证明在各个领域具有很大的价值。卟啉具有高摩尔吸光度的特点,可以与不同的金属离子和高比例的三重态以及可调结构形成络合物,因此它们是TTA-UC的重要敏化剂。卟啉基TTA-UC在TTA-UC体系中起着举足轻重的作用,在太阳能电池、传感和圆偏振发光。近年来,已经出现了基于卟啉的TTA-UC系统在光诱导反应中的应用,但很少有人注意。因此,这篇综述密切关注了基于卟啉的TTA-UC系统引发的光反应的最新进展。首先,卟啉基TTA-UC用于化学转化的光化学,如光异构化,光催化合成,光聚合,光降解和光化学/光电化学水分解,进行了详细的讨论,揭示了TTA-UC的不同机理以及进行合理的分子创新和纳米结构学以解决实际应用中存在的问题的方法。随后,证明了由基于卟啉的TTA-UC驱动的用于生物医学应用的光反应。最后,简要讨论了基于卟啉的光反应TTA-UC系统的未来发展。
Triplet-triplet annihilation upconversion (TTA-UC) is a very promising technology that could be used to convert low-energy photons to high-energy ones and has been proven to be of great value in various areas. Porphyrins have the characteristics of high molar absorbance, can form a complex with different metal ions and a high proportion of triplet states as well as tunable structures, and thus they are important sensitizers for TTA-UC. Porphyrin-based TTA-UC plays a pivotal role in the TTA-UC systems and has been widely used in many fields such as solar cells, sensing and circularly polarized luminescence. In recent years, applications of porphyrin-based TTA-UC systems for photoinduced reactions have emerged, but have been paid little attention. As a consequence, this review paid close attention to the recent advances in the photoreactions triggered by porphyrin-based TTA-UC systems. First of all, the photochemistry of porphyrin-based TTA-UC for chemical transformations, such as photoisomerization, photocatalytic synthesis, photopolymerization, photodegradation and photochemical/photoelectrochemical water splitting, was discussed in detail, which revealed the different mechanisms of TTA-UC and methods with which to carry out reasonable molecular innovations and nanoarchitectonics to solve the existing problems in practical application. Subsequently, photoreactions driven by porphyrin-based TTA-UC for biomedical applications were demonstrated. Finally, the future developments of porphyrin-based TTA-UC systems for photoreactions were briefly discussed.