能够将二氧化碳(CO 2)选择性地电化学转化为增值化合物的无贵金属催化剂的开发仍然是催化研究的主要挑战之一。在这里,我们目前系统地研究功能化配体bpy R PY2Me(bpyPY2Me = 6-(1,1-双(吡啶-2-基)乙基)-2,2'-联吡啶)的Fe(II)配合物。追求对从CO 2催化形成CO有选择性的水稳定性分子铁络合物。利用此配体歧管固有的高度可调性,我们遵循了生物启发的方法,通过安装了具有不同酸度(-H,-OH,-OMe,-NHEt和-NEt 2的质子官能团))进入配体框架,以系统地修饰Fe中心的第二个配位区域。该族[(bpy R PY2Me)Fe II ]配合物的特征是使用单晶X射线分析,1 H NMR光谱和质谱。通过伏安法和电解实验对这组化合物进行的比较催化评估确定了[(bpy NHEt PY2Me)Fe] 2+特别是一种高效的铁基非血红素CO 2电还原催化剂,对CO的转化具有明显的选择性。2在11
Tetradentate chelates bearing tripodal arranged terpyridine and a functional pyrazole unit (i.e., L1-H and L2-H) were employed in preparation of Ir(III) complexes [Ir(L1)Cl-2] (1) and [Ir(L2)Cl-2] (2); subsequent chloride-to-bipyrazolate substitution gave [Ir(L1)(bipz)] (3) and [Ir(L2)(bipz)] (4). Single-crystal X-ray structural studies on 1 and 3 showed the possession of a tetradentate chelate, whereas the remaining cis-sites are occupied by either dual chlorides or the bipz chelate, respectively. Sky blue organic light-emitting diode with peak efficiencies (10.1%, 19.8 cdA(-1), and 20.4 lmW(-1)) was successfully fabricated using 3 (or 4) as dopant emitter, highlighting the potential application of this class of Ir(III) phosphor.
Efficient synthesis of pentakis- and tris(pyridine) ligands
作者:E. Alper Ünal、Dennis Wiedemann、Josef Seiffert、John P. Boyd、Andreas Grohmann
DOI:10.1016/j.tetlet.2011.10.131
日期:2012.1
A variety of substituted tris(pyridyl) frameworks, as well as a pentakis(pyridine) system, are conveniently accessible in a one-pot synthesis, which consists of two sequential nucleophilic aromatic substitutions, employing substituted pyridine precursors.
To explore the structure–function relationships of cobaltcomplexes in the catalytic hydrogenevolution reaction (HER), we studied the substitution of a tertiary amine with a softer pyridine group and the inclusion of a conjugated bpy unit in a Co complex with a new pentadentate ligand, 6‐[6‐(1,1‐di‐pyridin‐2‐yl‐ethyl)‐pyridin‐2‐ylmethyl]‐[2,2′]bipyridinyl (Py3Me‐Bpy). These modifications resulted
作者:Yu-Sian Li、Jia-Ling Liao、Ke-Ting Lin、Wen-Yi Hung、Shih-Hung Liu、Gene-Hsiang Lee、Pi-Tai Chou、Yun Chi
DOI:10.1021/acs.inorgchem.7b01583
日期:2017.8.21
Tetradentate chelates bearing tripodal arranged terpyridine and a functional pyrazole unit (i.e., L1-H and L2-H) were employed in preparation of Ir(III) complexes [Ir(L1)Cl-2] (1) and [Ir(L2)Cl-2] (2); subsequent chloride-to-bipyrazolate substitution gave [Ir(L1)(bipz)] (3) and [Ir(L2)(bipz)] (4). Single-crystal X-ray structural studies on 1 and 3 showed the possession of a tetradentate chelate, whereas the remaining cis-sites are occupied by either dual chlorides or the bipz chelate, respectively. Sky blue organic light-emitting diode with peak efficiencies (10.1%, 19.8 cdA(-1), and 20.4 lmW(-1)) was successfully fabricated using 3 (or 4) as dopant emitter, highlighting the potential application of this class of Ir(III) phosphor.
Tuning Second Coordination Sphere Interactions in Polypyridyl–Iron Complexes to Achieve Selective Electrocatalytic Reduction of Carbon Dioxide to Carbon Monoxide
作者:David Z. Zee、Michael Nippe、Amanda E. King、Christopher J. Chang、Jeffrey R. Long
DOI:10.1021/acs.inorgchem.0c00455
日期:2020.4.6
significant selectivity for the conversion of CO2 to CO in acetonitrile solution with 11 M H2O. We propose that the NH group acts as a local proton source for cleaving the C–O bond in CO2 to form CO. Interestingly, the complex with the most acidic functional group in the second coordination sphere, [(bpyOHPY2Me)Fe]2+, favors formation of H2 over CO. Our results correlate the selectivity of water versus
能够将二氧化碳(CO 2)选择性地电化学转化为增值化合物的无贵金属催化剂的开发仍然是催化研究的主要挑战之一。在这里,我们目前系统地研究功能化配体bpy R PY2Me(bpyPY2Me = 6-(1,1-双(吡啶-2-基)乙基)-2,2'-联吡啶)的Fe(II)配合物。追求对从CO 2催化形成CO有选择性的水稳定性分子铁络合物。利用此配体歧管固有的高度可调性,我们遵循了生物启发的方法,通过安装了具有不同酸度(-H,-OH,-OMe,-NHEt和-NEt 2的质子官能团))进入配体框架,以系统地修饰Fe中心的第二个配位区域。该族[(bpy R PY2Me)Fe II ]配合物的特征是使用单晶X射线分析,1 H NMR光谱和质谱。通过伏安法和电解实验对这组化合物进行的比较催化评估确定了[(bpy NHEt PY2Me)Fe] 2+特别是一种高效的铁基非血红素CO 2电还原催化剂,对CO的转化具有明显的选择性。2在11