Organic Semiconductor Centre, EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY169ST, UK.
EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY169ST, UK.
Chemistry. 2023 Jan 9;29(2):e202202998. doi: 10.1002/chem.202202998. Epub 2022 Nov 14.
Donor-acceptor (D-A) thermally activated delayed fluorescent (TADF) compounds, such as 4CzIPN, have become a widely used sub-class of organic photocatalysts for a plethora of photocatalytic reactions. Multi-resonant TADF (MR-TADF) compounds, a subclass of TADF emitters that are rigid nanographene derivatives, such as DiKTa and Mes DiKTa, have to date not been explored as photocatalysts. In this study both DiKTa and Mes DiKTa were found to give comparable or better product yield than 4CzIPN in a range of photocatalytic processes that rely upon reductive quenching, oxidative quenching, energy transfer and dual photocatalytic processes. In a model oxidative quench process, DiKTa and Mes DiKTa gave increased reaction rates in comparison to 4CzIPN, with DiKTa being of particular interest due to the lower material cost (£0.94/mmol) compared to that of 4CzIPN (£3.26/mmol). These results suggest that DiKTa and Mes DiKTa would be excellent additions to any chemist's collection of photocatalysts.
供体-受体（D-A）热激活延迟荧光（TADF）化合物，如 4CzIPN，已成为许多光催化反应中广泛使用的有机光催化剂的一个子类。多共振 TADF（MR-TADF）化合物是 TADF 发射器的一个子类，是刚性纳米石墨烯衍生物，如 DiKTa 和 Mes DiKTa，迄今为止尚未被探索作为光催化剂。在这项研究中，DiKTa 和 Mes DiKTa 被发现与 4CzIPN 相比，在一系列依赖还原猝灭、氧化猝灭、能量转移和双光催化过程的光催化过程中，具有相当或更好的产物产率。在模型氧化猝灭过程中，DiKTa 和 Mes DiKTa 与 4CzIPN 相比，反应速率有所提高，由于 DiKTa 的材料成本（每毫摩尔 0.94 英镑）低于 4CzIPN（每毫摩尔 3.26 英镑），因此特别引人注目。这些结果表明，DiKTa 和 Mes DiKTa 将成为化学家光催化剂收藏中的优秀补充。
