Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin (Germany).
Institut für Anorganische Chemie, Georg-August Universität Göttingen, Tammanstraße 4, 37077, Göttingen (Germany).
Angew Chem Int Ed Engl. 2015 Nov 9;54(46):13792-5. doi: 10.1002/anie.201506061. Epub 2015 Sep 30.
A Co(III) complex with a mesoionic pyridylcarbene ligand is presented. This complex is an efficient electrocatalyst for H2 production at very low overpotential and high turnovers when using a (glassy carbon) GC electrode. The corresponding triazole complexes display no catalytic activity whatsoever under identical conditions. The remarkable robustness of the Co-C(carbene) bond towards acids is likely responsible for the high efficiency of this catalyst. The present results thus open new avenues for carbene-based ligands for generating functional models for hydrogenases.
本文报道了一个偕甲酰基咪唑啉配体的钴(III)配合物。该配合物在使用（玻碳）GC 电极时，在非常低的过电势和高转化率下，是一种高效的析氢电催化剂。在相同条件下，相应的三唑配合物没有表现出任何催化活性。该催化剂对酸的 Co-C(碳烯)键的高稳定性可能是其高效性的原因。因此，本研究结果为设计基于碳烯的配体生成功能性氢化酶模型开辟了新途径。
