Establishing the Family of Diruthenium Water Oxidation Catalysts Based on the Bis(bipyridyl)pyrazolate Ligand System.
Establishing the Family of Diruthenium Water Oxidation Catalysts Based on the Bis(bipyridyl)pyrazolate Ligand System.
复制标题
基于双(联吡啶)吡唑配体体系建立二钌水氧化催化剂家族
DOI:
10.1021/acs.inorgchem.5b02869
复制
发表时间:
2016
影响因子:
4.6
通讯作者:
F. Meyer
中科院分区:
文献类型:
--
作者:
S. Neudeck;S. Maji;I. Lopez;S. Dechert;J. Benet-Buchholz;A. Llobet;F. Meyer
A bis(bipyridyl)pyrazolate (Mebbp–) has recently been introduced as a rugged dinucleating, bis(tridentate) ligand for the formation of efficient diruthenium water oxidation catalysts (J. Am. Chem. Soc.2014,136, 24–27). Now, detailed protocols for the synthesis of a whole family of such dinuclear ruthenium complexes [{Ru(pyR2)2}2(μ-R1bbp)(X,Y)]2+based on the bis(bipyridyl)pyrazolate scaffold are reported. The isolation of a synthetic key intermediate allowed the straightforward introduction of different pyridines as axial ligands. Thereby, a set of complexes with different substituents at the pyrazolate backbone (R1= Br, H, Me), different pyridines as axial ligand (R2= H, NMe2, SO3), and different (non)bridging units in thein,in-position (X,Y = Cl, H2O, OAc) has been prepared and thoroughly characterized. Complexes of the type [{Ru(pyR2)2}2(μ-R1bbp)(μ-OAc)]2+, with an exogenous acetato bridge, have been used as catalyst precursors in catalytic water oxidation experiments with a sacrificial oxidant. The effect of substitution on the pyrazole core of theR1bbp–ligand as well as on the pyridine ligands on both electrochemistry and catalytic activity has been systematically investigated. The catalyst stability, reflected by the turnover number, is crucially determined by the substituent at the pyrazolate ligand (R1= Me > H > Br). In contrast, the axial pyridine ligands modulate the rate of the catalytic process, expressed by the initial turnover frequency (R2= H > NMe2H+).
登录
查看更多内容
影响因子:
15
作者:
Neudeck, Sven;Maji, Somnath;Llobet, Antoni
通讯作者:
Llobet, Antoni
影响因子:
4.6
作者:
Nora Planas;G. Christian;Stephan Roeser;Elena Mas;M. Kollipara;J. Benet‐Buchholz;F. Maseras;A. Llobet
通讯作者:
A. Llobet
影响因子:
4
作者:
Joaquim Mola;Chiara Dinoi;X. Sala;Montserrat Rodríguez;I. Romero;T. Parella;X. Fontrodona;A. Llobet
通讯作者:
A. Llobet
影响因子:
4.6
作者:
S. Maji;Isidoro López;Fernando Bozoglián;J. Benet‐Buchholz;A. Llobet
通讯作者:
A. Llobet
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
S. V. Kryatov;E. Rybak;F. Meyer;H. Pritzkow
通讯作者:
H. Pritzkow