据报道,即使在 1% CO 2下,聚吡啶铁基骨架也可用于选择性 CO 2到 CO 的光还原。机理见解揭示了两个连续的单电子转移,在 Fe 和配体上为 CO 2添加提供了具有离域电子密度的中间体。质子辅助的 CO 形成对于 CO 2还原至关重要。悬垂的质子穿梭 α-OH 基团专门将转化转换为 H 2,从而能够在灵活的 CO/H 2比率下形成自分选合成气。
Solid-Phase Synthesis as a Platform for the Discovery of New Ruthenium Complexes for Efficient Release of Photocaged Ligands with Visible Light
作者:Rajgopal Sharma、Jessica D. Knoll、Nicholas Ancona、Phillip D. Martin、Claudia Turro、Jeremy J. Kodanko
DOI:10.1021/ic502791y
日期:2015.2.16
great potential as therapeutics. A method was developed to rapidly synthesize, screen, and identify ruthenium-based caging groups that release nitriles upon irradiation with visible light. A diverse library of tetra- and pentadentate ligands was synthesized on polystyrene resin. Ruthenium complexes of the general formula [Ru(L)(MeCN)n]m+ (n = 1–3, m = 1–2) were generated from these ligands on solid phase
钌基光笼基团作为生物工具具有重要的应用,并显示出巨大的治疗潜力。开发了一种快速合成,筛选和鉴定基于钌的笼形基团的方法,该基团会在可见光照射下释放出腈。在聚苯乙烯树脂上合成了多样化的四齿和五齿配体库。通式[Ru(L)(MeCN)n ] m +(n = 1-3,m的钌配合物= 1-2)是从固相上的这些配体生成的,然后从树脂上裂解下来进行光化学分析。数据表明光谱调谐和与可见光的反应性范围很广。通过溶液相合成了在可见光范围内显示出强吸收性的三种配合物用于比较。溶液和固相复合物的光化学行为非常吻合,这证实了文库方法可用于在短期内鉴定具有所需光反应性的候选物,从而避免了耗时的色谱法和化合物纯化。
Identification of novel potent and non-toxic anticancer, anti-angiogenic and antimetastatic rhenium complexes against colorectal carcinoma
were discovered to possess remarkable anticancer, anti-angiogenic and antimetastatic activity in vivo (zebrafish-human HCT-116 xenograft model), being effective at very low doses (1–3 μM). At doses as high as 250 μM the complexes did not provoke toxicity issues encountered in clinical anticancer drugs (cardio-, hepato-, and myelotoxicity). In vivo assays showed that the two compounds exceed the anti-tumor
A strong-field pentadentate ligand in iron-based alkane oxidation catalysis and implications for iron(iv) oxo intermediates
作者:Emma Wong、Jonathan Jeck、Michaela Grau、Andrew J. P. White、George J. P. Britovsek
DOI:10.1039/c3cy20823k
日期:——
complex, which is rapidly reduced to the oxo-bridged dinuclear iron(III) complex [(Fe(1))2(μ-O)](ClO4)4. The catalytic properties of the iron(II) complex [Fe(1)(CH3CN)](ClO4)2 for the oxidation of cyclohexane with various amounts of H2O2 has been evaluated. Moderate catalytic activities, comparable to other iron(II) complexes featuring pentadentate ligands but significantly lower than the tetradentate
已经制备了五齿配体双(吡啶基甲基)(联吡啶基甲基)胺BPAbipy 1和铁(II)络合物[Fe(1)(CH 3 CN)](ClO 4)2。强场配体1稳定了低自旋铁(II)配合物,从而导致Fe(II)/ Fe(III)氧化还原对的高氧化还原电势为1.01 V (相对于SCE)。高价铁配合物被强场配体和[Fe(1)(CH 3 CN)](ClO 4)2的反应不稳定。认为与PhIO结合使用会导致铁(IV)的络合物寿命短,该络合物会迅速还原为氧桥双核铁(III)络合物[(Fe(1))2(μ-O)](ClO 4)4。铁(II)络合物[Fe(1)(CH 3 CN)](ClO 4)2的催化性能环己烷已经评估了各种量的H 2 O 2的含量。已观察到中等催化活性,可与具有五齿配体的其他铁(II)配合物相比,但明显低于四齿BPMEN配体。
Water Oxidation by Mononuclear Ruthenium Complexes with TPA-Based Ligands
作者:Bhasker Radaram、Jeffrey A. Ivie、Wangkheimayum Marjit Singh、Rafal M. Grudzien、Joseph H. Reibenspies、Charles Edwin Webster、Xuan Zhao
DOI:10.1021/ic200050g
日期:2011.11.7
oxidant, stoichiometric oxidation of water by [Ru(TPA)(H2O)2]2+ was observed, while Ru(Me3TPA)(H2O)2]2+ has much less activity for wateroxidation. Compared to [Ru(TPA)(H2O)2]2+ and [Ru(Me3TPA)(H2O)2]2+, [Ru(DPA-Bpy)(H2O)]2+ exhibited 20 times higher activity for wateroxidation. This study demonstrates a new type of ligand scaffold to support wateroxidation by mononuclear Ru complexes.