An efficient water reduction system was developed using thermally activated delayed fluorescence (TADF) dyes as organic photosensitizers and a palladium complex as water reduction catalyst. 2,4,5,6-tetrakis(carbazol-9-yl)-1,3-dicyanobenzene (4CzIPN) that has the best fluorescence efficiency displayed the highest photoinduced productivity (TON up to 2567) and was active for 5 days. Based on time-resolved photoluminescence experiments on the photocatalytic system, reductive quenching of the TADF dye was found as main pathway occurring before intersystem crossing takes place.

中文翻译：

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热活化延迟荧光（TADF）染料可作为有效的有机光敏剂，用于光催化减水

开发了一种有效的减水系统，该系统使用热活化延迟荧光（TADF）染料作为有机光敏剂，并使用钯配合物作为减水催化剂。具有最佳荧光效率的2,4,5,6-四（咔唑-9-基）-1,3-二氰基苯（4CzIPN）显示出最高的光诱导生产率（TON高达2567），并且活性达5天。基于光催化系统上的时间分辨光致发光实验，发现TADF染料的还原猝灭是发生系统间交叉之前发生的主要途径。