二芳基乙烯衍生物：一個創新的光催化 CO2轉化為CO的還原反應

Abstract

光催化二氧化碳還原反應已經成為全球性議題，近年來，除了雙核超分子系統，利用氫鍵、動態配位結合等高效的光催化體系皆已被廣泛報導。值得注意的是，反應的可調控性是一個創新的目標，表明其為一個具有高自由度的開/關反應。本研究中選用二芳基乙烯衍生物作為光致變色材料，並於實驗中證明該材料的高度可逆性以及高響應。其中，透過核磁共振光譜儀及紫外線/可見光光譜儀進行滴定實驗，並成功確定了光催化劑與二芳基乙烯之間的配位關係。在光催化二氧化碳還原反應中，得知開放形式的轉換數 (TON) 為313；封閉形式的轉換數 (TON) 為27，並透過開放/封閉形式之間的光誘導相互轉換證明了二氧化碳還原反應的可控性。

There is a need to explore photocatalytic CO2 reduction worldwide. In recent years, high efficiency photocatalysis systems such as bi-nuclear supramolecular, hydrogen bonding, dynamic coordination, and others were reported extensively. It is noteworthy that the controllable element of the reaction is an innovative target, indicating that it is a switch-on/off reaction with a high degree of freedom. We have used diarylethene darivates as a photochromic material herein, and the material was demonstrated to be highly reversible and responsive. As a result of 1H nuclear magnetic resonance and UV titrations, we were able to determine the coordination between catalyst and diarylethene. A photocatalytic conversion of CO2 to CO gave a turnover number (TON) of 313 for the open form and 27 for the closed form, respectively, as a result of the photocatalytic CO2-to-CO conversion. The light-induced interconversion between open and closed forms demonstrated its controllability.