A new porous titanium(IV) squarate metal–organic framework (MOF), denoted as IEF-11, having a never reported titanium secondary building unit, is successfully synthesized and fully characterized. IEF-11 not only exhibits a permanent porosity but also an outstanding chemical stability. Further, as a consequence of combining the photoactive Ti(IV) and the electroactive squarate, IEF-11 presents relevant optoelectronic properties, applied here to the photocatalytic overall water splitting reaction. Remarkably, IEF-11 as a photocatalyst is able to produce record H₂ amounts for MOF-based materials under simulated sunlight (up to 672 µmol g_catalyst in 22 h) without any activity loss during at least 10 d.

中文翻译：

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一种新型多孔钛方酸盐作为模拟阳光照射下整体水分解反应的高效光催化剂

一种新型多孔钛（IV）方金属有机骨架（MOF），表示为 IEF-11，具有从未报道过的钛二次构建单元，已成功合成并充分表征。IEF-11 不仅具有永久的孔隙率，而且还具有出色的化学稳定性。此外，由于结合了光活性 Ti(IV) 和电活性方酸盐，IEF-11 呈现出相关的光电特性，在此应用于光催化整体水分解反应。值得注意的是，IEF-11 作为光催化剂能够在模拟阳光下为 MOF 基材料产生创纪录的 H ₂量（22 小时内高达 672 µmol g_催化剂），至少在 10 d 内没有任何活性损失。