Photocatalytic CO2 Reduction under Visible-Light Irradiation by Ruthenium CNC Pincer Complexes.,Chemistry - A European Journal

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Photocatalytic CO2 Reduction under Visible-Light Irradiation by Ruthenium CNC Pincer Complexes.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2020-04-15 , DOI: 10.1002/chem.201905840
Yasuhiro Arikawa ₁ , Itoe Tabata ₁ , Yukari Miura ₁ , Hiroki Tajiri ₁ , Yudai Seto ₁ , Shinnosuke Horiuchi ₁ , Eri Sakuda ₁ , Keisuke Umakoshi ₁

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Photocatalytic CO2 reduction using a ruthenium photosensitizer, a sacrificial reagent 1,3-dimethyl-2-(o-hydroxyphenyl)-2,3-dihydro-1H-benzo[d]imidazole (BI(OH)H), and a ruthenium catalyst were carried out. The catalysts contain a pincer ligand, 2,6-bis(alkylimidazol-2-ylidene)pyridine (CNC) and a bipyridine (bpy). The photocatalytic reaction system resulted in HCOOH as a main product (selectivity 70-80 %), with a small amount of CO, and H2 . Comparative experiments (a coordinated ligand (NCMe vs. CO) and substituents (tBu vs. Me) of the CNC ligand in the catalyst) were performed. The turnover number (TONHCOOH ) of carbonyl-ligated catalysts are higher than those of acetonitrile-ligated catalysts, and the carbonyl catalyst with the smaller substituents (Me) reached TONHCOOH =5634 (24 h), which is the best performance among the experiments.

中文翻译：

钌CNC夹钳配合物在可见光照射下的光催化CO2还原。

使用钌光敏剂，牺牲试剂1,3-二甲基-2-（邻羟基苯基）-2,3-二氢-1H-苯并[d]咪唑（BI（OH）H）和钌催化剂进行光催化还原CO2被执行。所述催化剂包含夹钳配体，2，6-双（烷基咪唑-2-亚甲基）吡啶（CNC）和联吡啶（bpy）。光催化反应系统产生的主要产物为HCOOH（选择性为70-80％），其中含有少量的CO和H2。进行了对比实验（催化剂中CNC配体的配位配体（NCMe与CO）和取代基（tBu与Me））。羰基连接的催化剂的周转数（TONHCOOH）高于乙腈连接的催化剂，具有较小取代基（Me）的羰基催化剂的TONHCOOH = 5634（24 h），是实验中最好的性能。

更新日期：2020-04-15

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