Critical Hammett Electron-Donating Ability of Substituent Groups for Efficient Water Oxidation Catalysis by Mononuclear Ruthenium Aquo Complexes
作者:Shunsuke Watabe、Yuki Tanahashi、Masanari Hirahara、Hirosato Yamazaki、Kosuke Takahashi、Eman A. Mohamed、Yuta Tsubonouchi、Zaki N. Zahran、Kenji Saito、Tatsuto Yui、Masayuki Yagi
DOI:10.1021/acs.inorgchem.9b01623
日期:2019.10.7
[Ru(Rtpy)(bpy)(H2O)]2+ (1R; bpy = 2,2′-bipyridine, and Rtpy = 2,2′:6′,2″-terpyridine derivatives) complexes with a variety of 4′-substituent groups on Rtpy were synthesized and characterized to reveal the effects of substituents on their structures, physicochemical properties, and catalytic activities for wateroxidation. The geometric structures of 1R are not considerably influenced by the electron-donating
[Ru(Rtpy)(bpy)(H 2 O)] 2+(1R ; bpy = 2,2'-联吡啶,Rtpy = 2,2':6',2''-叔吡啶衍生物)配合物合成并表征了Rtpy上的4'-取代基,以揭示取代基对其结构,理化性质和对水氧化的催化活性的影响。1R的几何结构不受Rtpy上4'取代基的供电子能力影响。对于1R观察到类似的多步质子偶联电子转移反应并且,随着取代基的供电子能力的增加,每个氧化步骤的氧化还原电势趋于降低,这可以解释为供电子基团在Ru中心的电子密度增加,从而稳定了积聚的正电荷。在氧化时。这与由于Ru中心的d轨道能级增加而分配给1R的金属到配体电荷转移跃迁的480 nm附近吸收带的红移一致。然而,水氧化催化反应的1R转换频率(k O 2)很大程度上取决于Rtpy配体,范围从0.05×10 –2到44×10 –2 s –1(因为观察到R =乙氧基的最高k O 2)是880倍。4'-取代
4′-Functionalized 2,2′:6′,2″-terpyridines as the NˆN domain in [Ir(CˆN)2(NˆN)][PF6] complexes
作者:Daniel P. Ris、Gabriel E. Schneider、Cathrin D. Ertl、Emanuel Kohler、Thomas Müntener、Markus Neuburger、Edwin C. Constable、Catherine E. Housecroft
DOI:10.1016/j.jorganchem.2015.08.021
日期:2016.6
complexes [Ir(ppy)2(NˆN)][PF6] (Hppy = 2-phenylpyridine) with NˆN = 4′-chloro-2,2′:6′,2″-terpyridine (1), 4′-methoxy-2,2′:6′,2″-terpyridine (2), 4′-ethoxy-2,2′:6′,2″-terpyridine (3), 4′-methylthio-2,2′:6′,2″-terpyridine (4), 4′-phenylthio-2,2′:6′,2″-terpyridine (5) and 4′-dimethylamino-2,2′:6′,2″-terpyridine (6) are reported including the single crystal structures of 2[Ir(ppy)2(1)][PF6]}·0.6Et2O·CH2Cl2
Cytotoxicity of (2,2‘:6‘,2‘ ‘-Terpyridine)platinum(II) Complexes to <i>Leishmania </i><i>d</i><i>onovani</i>, <i>Trypanosoma </i><i>c</i><i>ruzi</i>, and <i>Trypanosoma </i><i>b</i><i>rucei</i>
作者:Gordon Lowe、Anne Sophie Droz、Tirayut Vilaivan、George W. Weaver、Lindsay Tweedale、Jonathan M. Pratt、Peter Rock、Vanessa Yardley、Simon L. Croft
DOI:10.1021/jm981074c
日期:1999.3.1
with complexes in which the fourth ligand to platinum(II) is capable of being substituted with a substitution inert hydroxyethanethiolate complex are compared. The ammine complexes show high antiprotozoal activity suggesting that the trans influence of the 2,2':6',2''-terpyridine ligand has a profound effect on the ease of displacement of the fourth ligand in (2,2':6',2'' -terpyridine)platinum(II) complexes
Synthesis of 4,5-diheteroarylphenanthrenes and their dinuclear ruthenium(ii) bis(2,2′:6′,2″-terpyridine) complexes possessing severe helical twists
作者:Bo Wen、Jeffrey L. Petersen、Kung K. Wang
DOI:10.1039/b921667g
日期:——
Three 4,5-diheteroarylphenanthrenes 2a, 2b and 2c and two dinuclear Ru(ii) bis(terpyridine) complexes 13 and 14 possessing severe helical twists were synthesized.
General Synthesis of Di-μ-oxo Dimanganese Complexes as Functional Models for the Oxygen Evolving Complex of Photosystem II
作者:Hongyu Chen、Ranitendranath Tagore、Siddhartha Das、Christopher Incarvito、J. W. Faller、Robert H. Crabtree、Gary W. Brudvig
DOI:10.1021/ic0509940
日期:2005.10.1
water, is a functional model for the oxygen-evolving complex of photosystem II (Limburg, et al. J. Am. Chem. Soc. 2001, 123, 423-430). Crystals of Mn(II)(dpya)Cl2, Mn(II)(Ph-terpy)Cl2, Mn(II)(mesityl-terpy)Cl2, and an organic-soluble di-mu-oxo di-aqua dimanganesecomplex, [Mn(III/)(IV)2(mu-O)2(mesityl-terpy)2(OH2)2](NO3)3, were obtained and characterized by X-ray crystallography. Solutions of the in situ-formed