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Bulletin of Japan Society of Coordination Chemistry最新文献

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Solid State Electrochemistry and Battery Application of Coordination Compounds 固体电化学及配位化合物在电池中的应用
Pub Date : 2017-01-01 DOI: 10.4019/BJSCC.69.45
M. Okubo
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引用次数: 0
Pioneering studies on solid state chemistry of multinuclear metal complexes 多核金属配合物固态化学的开创性研究
Pub Date : 2017-01-01 DOI: 10.4019/BJSCC.69.2
H. Oshio
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引用次数: 0
Molecular Fuel Cell –Dihydrogen and Dioxygen Activation Inspired by Hydrogenase– 氢化酶激发的分子燃料电池-二氢和二氧活化
Pub Date : 2017-01-01 DOI: 10.4019/BJSCC.69.50
Takahiro Matsumoto
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引用次数: 1
Development of New Catalytic Reactions Promoted by Iron Complexes 铁配合物催化反应的新进展
Pub Date : 2017-01-01 DOI: 10.4019/BJSCC.69.12
H. Nakazawa
遷移金属錯体は、その構造の多様性、反応性の豊かさ、 また特徴的な機能の発現などの点で、魅力的な化合物で ある。これらの特性は遷移金属と配位子の組み合わせに より大きく左右される。我々は遷移金属錯体が示す触媒 反応に注目し、しかも鉄錯体に焦点を当てて研究を行っ てきた。パラジウムや白金などの貴金属の錯体は、種々 の反応において高い触媒活性を示すことが知られている が、これらの金属は高価であり、また産地が限られてい るため入手自体が困難である。これに対して鉄は安価で、 どこでも産出し、埋蔵量も豊富であることから枯渇の心 配がなく、また人体に対する毒性が極めて低い。従って 鉄錯体が高活性触媒として、あるいは特徴的触媒として 働く反応が開発できれば、世の中に大きく貢献できるこ とになる。そんな思いから鉄錯体を用いた新しい触媒反 応の開発に取り組んできた。本稿では得られた研究成果 の中から、以下の 3つのトピックスに焦点を絞り紹介す る。 ■■ 2.1. 強い結合の選択的切断反応の開発
过渡金属配合物因其结构的多样性、反应性的丰富性以及特征功能的表现等,是具有吸引力的化合物。这些特性很大程度上取决于过渡金属和配体的组合。我们一直关注过渡金属配合物所表现出的催化反应,并且重点研究铁配合物。众所周知,钯金和白金等贵金属的配合物在各种反应中都表现出很高的催化活性,但这些金属价格昂贵,而且产地有限,很难得到。与此相对,铁价格低廉,到处都有产,而且埋藏量丰富,不会枯竭,而且对人体的毒性极低。因此,如果能开发出铁配合物作为高活性催化剂或特特性催化剂的反应,将会对世界做出巨大贡献。抱着这样的想法,我们致力于开发利用铁络合物的新型催化反应。本文从获得的研究成果中,聚焦以下三个话题进行介绍。■■2.1.强结合的选择性切断反应的开发
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引用次数: 0
Enantioselective Synthesis of Planar-Chiral Transition-Metal Complexes by Homogeneous Olefi n-Metathesis Reactions and Their Application in Asymmetric Catalysis 均相烯烃n-复合反应对映选择性合成平面手性过渡金属配合物及其在不对称催化中的应用
Pub Date : 2017-01-01 DOI: 10.4019/BJSCC.70.14
M. Ogasawara
rather classical methods. Indeed, examples of catalytic enantio-control of planar chirality in transition-metal complexes have been extremely rare, and this has been still a developing area in this fi eld. In this account, recent results from our research group on the catalytic asymmetric synthesis of various planar-chiral transition-metal complexes are outlined. The Mo-catalyzed asymmetric ring-closing metathesis has been found to be a powerful method to control the planar chirality in various transition-metal complexes such as ferrocenes, ruthenocenes, ( π -arene)chromium complexes, cymantrene derivatives, etc. Application of the highly enantiomerically enriched planar-chiral complexes in asymmetric synthesis has been also demonstrated.
非常经典的方法。事实上,过渡金属配合物中催化对映体控制平面手性的例子非常罕见,这仍然是该领域的一个发展领域。本文概述了本课程组在催化不对称合成各种平面手性过渡金属配合物方面的最新研究成果。钼催化的不对称合环复合反应是控制二茂铁、钌茂烯、(π -芳烃)铬配合物、环己烯衍生物等过渡金属配合物的平面手性的有效方法。高度对映体富集的平面手性配合物在不对称合成中的应用也得到了证实。
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引用次数: 0
Design and Applications of Single-Site Photocatalysts Using Nano-Space 纳米空间单点光催化剂的设计与应用
Pub Date : 2017-01-01 DOI: 10.4019/BJSCC.69.35
H. Yamashita
photocatalysts (tetrahedral-coordinated metal oxide moiety, metal complexes) in nanoporous materials (zeolites, mesoporous silica, metal-organic frameworks) not only can promote unique photocatalytic reactions but also can be utilized to synthesize functional materials: visible-light sensitive single-site photocatalysts, nano-sized metal catalysts, superhydrophilic and superhydrophobic porous thin films. tetrahedral-coordination single-site photocatalysts . photocatalysts photocatalytic synthesize plasmonic nano-metal visible-light binary oxide photocatalyst single-site photocatalyst light irradiation.
纳米多孔材料(沸石、介孔二氧化硅、金属有机框架)中的光催化剂(四面体配位金属氧化物部分、金属配合物)不仅可以促进独特的光催化反应,而且可以用于合成功能材料:可见光敏感单位点光催化剂、纳米金属催化剂、超亲水性和超疏水性多孔薄膜。四面体配位单位点光催化剂。光催化剂光催化合成等离子体纳米金属可见光二元氧化物光催化剂单点光催化剂光辐照。
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引用次数: 0
The Amazing High-Valent Nonheme Iron-Oxo Landscape 惊人的高价非血红素铁氧景观
Pub Date : 2016-05-31 DOI: 10.4019/BJSCC.67.10
L. Que, Mayank Puri
Over the past 25 years, a-ketoglutarate (aKG)-dependent enzymes with mononuclear nonheme iron centers that activate dioxygen have emerged as a versatile family of enzymes involved in a variety of important metabolic transformations as well as in the biosynthesis of antibiotics. These enzymes are capable of C–H bond hydroxylation, halogenation, and stereoinversion, C–C bond desaturation, and heterocyclic ring formation. Their active sites, as represented by taurine:aketoglutarate dioxygenase (TauD), generally consist of a 2-His-1-carboxylate facial triad that serves to bind the iron(II) center. In the nonheme iron halogenase enzymes, the carboxylate is replaced by a chloride or a bromide, which is the atom that is incorporated into the C–H bond. Reaction of the reduced enzymes with O2 leads to the generation of highvalent oxoiron intermediates responsible for the critical C– H cleavage step (Scheme 1). Such species have been trapped by Bollinger and Krebs for several enzymes in this family and demonstrated to have a high-spin S = 2 Fe=O unit that is kinetically competent to cleave the C–H bonds of their respective substrates with large nonclassical H/D kinetic isotope effects.
在过去的25年里,a-酮戊二酸(aKG)依赖的酶,具有激活双氧的单核非血红素铁中心,已经成为一个多用途的酶家族,参与各种重要的代谢转化以及抗生素的生物合成。这些酶具有碳氢键羟基化、卤化和立体转化、碳氢键去饱和和杂环形成的能力。它们的活性位点,以牛磺酸为代表:aketoglutarate dioxygenase (TauD),通常由2- his1 -羧酸表面三联体组成,用于结合铁(II)中心。在非血红素铁卤素酶中,羧酸盐被氯离子或溴离子取代,氯离子是与C-H键结合的原子。还原酶与O2的反应导致产生高价氧化铁中间体,负责关键的C - H裂解步骤(方案1)。这些物种已经被Bollinger和Krebs捕获,用于该家族的几种酶,并证明具有高自旋S = 2 Fe=O单元,具有裂解各自底物的C - H键的动力学能力,具有较大的非经典H/D动力学同位素效应。
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引用次数: 8
Cationic Pyridine(diimine) Iron Tethered Alkene Complexes: Synthetic Models For Elusive Intermediates In Iron-Catalyzed Ethylene Polymerization 阳离子吡啶(二亚胺)铁系链烯烃配合物:铁催化乙烯聚合中难以捉摸的中间体的合成模型
Pub Date : 2016-05-31 DOI: 10.4019/BJSCC.67.19
P. Chirik, Brian A. Schaefer, Grant W. Margulieux
Aryl-substituted pyridine(diimine) iron and cobalt dihalide complexes, when activated with excess methylaluminoxane (MAO) in presence of ethylene, exhibit high activity for the production of linear polyethylene. Alteration of the tridentate ligand from pyridine(diimine) to modified a -di imines with pendant phosphine donors (PNN) resulted in efficient iron and cobalt catalysts for ethylene oligomerization. The results are notable as deviation from the pyridine(diimine) scaffold usually results in catalysts with diminished performance. Considerable effort has been devoted to understanding the identity and nature of the propagating species in olefin polymerization, including the spin state of the first row transition metal and the role of the potentially redox-active chelate. Our group has reported the synthesis of cationic bis(imino)pyridine iron and cobalt alkyl complexes that serve as single component catalysts for the polymerization of ethylene (Figure 1). In each case examined, neutral pyridine(diimine) chelates were observed suggesting that redox chemistry with the supporting ligand is not a necessary component for catalytic performance. More recently, we have discovered that addition of the neutral, Lewis acidic borane, B(C6F5)3 to both bis(imino)pyridine and PNN-supported iron butadiene complexes resulted in C-B bond formation to yield the corresponding borate betaine derivatives that are also active for ethylene polymerization and oligomerization, respectively, without the need for an additional activator. Elucidation of the electronic structures of the bis(imino)pyridine derivative established a high spin Fe(II) ion engaged in antiferromagnetic coupling to both chelate (S = 1⁄2) and allyl (S = 1⁄2 ) radical anions.
三齿配体由吡啶(二亚胺)转变为具有悬垂膦供体(PNN)的改性a -二亚胺,产生了高效的乙烯低聚铁和钴催化剂。结果是值得注意的,因为偏离吡啶(二亚胺)支架通常会导致催化剂性能下降。在烯烃聚合中,包括第一排过渡金属的自旋态和潜在的氧化活性螯合物的作用在内的传播物种的特性和性质已经投入了大量的努力。我们的团队已经报道了阳离子双(亚胺)吡啶铁和钴烷基配合物的合成,作为乙烯聚合的单组分催化剂(图1)。在每一种情况下,观察到中性吡啶(二亚胺)螯合物,这表明与支撑配体的氧化还原化学不是催化性能的必要组成部分。最近,我们发现将中性的Lewis酸性硼烷B(C6F5)3添加到双(亚胺)吡啶和pnn负载的丁二烯铁配合物上,可以形成C-B键,从而产生相应的硼酸甜菜碱衍生物,这些衍生物也分别对乙烯聚合和低聚具有活性,而不需要额外的活化剂。对双(亚)吡啶衍生物的电子结构的分析表明,高自旋Fe(II)离子与螯合(S = 1⁄2)和烯丙基(S = 1⁄2)自由基发生反铁磁偶联。
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引用次数: 4
遷移金属錯体の電場変調 ( シュタルク) 吸収スペクトル 过渡金属配合物的电场调制(史塔克)吸收光谱
Pub Date : 2016-05-31 DOI: 10.4019/BJSCC.67.75
圭祐 川本, 秀樹 橋本
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引用次数: 0
Creation of Electro- and Photo-functional Molecular Systems Based on Coordination Programming 基于配位规划的电与光功能分子系统的创建
Pub Date : 2016-01-01 DOI: 10.4019/BJSCC.67.2
Hiroshi Nishihara
2.1. レドックス錯体修飾電極の作製と電子移動解析 分子機能と電極反応の相乗作用による複合機能を探 求する分子修飾電極の研究は、1974年に報告された Aviramと Ratnerによるドナー(D)分子とアクセプタ ー(A)分子結合した分子整流器の概念をきっかけとし て理論研究からスタートし、その後、走査プローブ顕微 鏡の発明やナノギャップ電極作製の実現などの実験技術 の進歩に伴って、現在まで大きく発展してきた 。我々 は、1985年頃から可逆なレドックス特性を示すフェロ セン、コバルトセンなどのメタロセン電解重合膜被覆電 極を用いて、溶存レドックス種とレドックス薄膜との電 子移動に基づく一方向電子移動の発現 や異種レドッ クス二層膜による固体型ケミカル(レドックス)ダイオ ード特性の発現 を見出した。それらのレドックス高 分子被覆電極では、レドックスサイトが薄膜中にランダ ムに分布する系であったが、2005年頃から界面での逐 次錯形成を用いるボトムアップ法により、π共役レドッ クス錯体ワイヤを設計通りに配列できる系の構築 を研 究展開し、それらの電気化学測定により、単分子ワイヤ を通した電子移動の機構・熱力学・速度論を定量的に解 析した 。 この界面ボトムアップ錯形成法では、金、ITO、シリ コンなどの電極基板表面に配位子を化学結合した後、金 属イオンと π共役架橋配位子を逐次的に錯形成すること により、任意の錯体ユニット数、色々な金属イオンや架 橋配位子の組合せ、直線状や樹状などの様々な形状のレ ドックス錯体分子ネットワークが構築できる 。我々 は実際に、鉄、コバルト、ルテニウムを中心金属とする In this review, a new research area on highly integrated metal-containing p-conjugated and/or redox-active systems constructed by coordination programming, which is to utilize the advantages of coordination chemistry to control the chemical bonds and arrangements of metal atoms and ions for creation of superstructures, has been reported. The topics involved are 1) interfacial synthesis of p-conjugated redox complex oligomer/polymer wires on electrodes and analysis of their electron conduction mechanism and kinetics, 2) creation of coordination nanosheets (CONASHs), 3) synthesis of p-conjugated redox metal complex oligomers, polymers and clusters and analysis of their electronic properties, 4) synthesis of metal complexes responsive to external-stimuli and analysis of their unique properties and functions, 5) metal nanoparticles coordinated with functional molecules, and 6) development of bio-photosensors using combination of cyanobacterial photosystem I and molecular wire. These research results indicate that coordination programming is a promising approach to construct intelligent hetero-molecular conjugated systems useful for development of chemical devices.
2.1.传统络合物修饰电极的制备和电子迁移分析分子修饰电极的研究通过分子功能和电极反应的协同作用来寻找复合功能,1974年Aviram和以Ratner的施主(D)分子和接受者(A)分子结合的分子整流器概念为契机,从理论研究开始,之后扫描探针显微随着实验技术的进步,镜的发明和纳米间隙电极的制备的实现,到现在为止有了很大的发展。从1985年开始,我们使用具有可逆传统特性的铁线、钴线等金属电解聚合膜覆盖电极,发现基于溶解传统种和传统薄膜之间的电子转移的单向电子转移。发现了异种雷多克斯双层膜的固体型化学(雷多克斯)二极管特性。在这些正统高分子包覆电极中,雷射体是在薄膜中呈线性分布的体系,但从2005年开始,通过使用界面处逐次错形成的自下而上方法,π共轭雷射体研究了按照设计排列x配合物导线的体系,通过电化学测定,定量地分析了通过单分子导线的电子移动的机构、热力学、速度论。该界面自下而上错形成法是将配体化学结合在金、ITO、硅基等电极基板表面,然后依次错形成金属离子和π共轭交联配体。因此,可以构建任意的配合物单元数、各种金属离子和架桥配体的组合、直线状和树状等各种形状的正统配合物分子网络。实际上,我们将以铁、钴、钌为核心金属的In this reviewnew research area on highly integrated metal-containing p-conjugated and/or redox-active systemsconstructed by coordination programming,which is to utilize the advantages of coordination chemistry to control the chemical bonds andarrangements of metal atoms and ions for creation of superstructures,has been reported. The topics involved are 1) interfacial synthesis of p-conjugated redox complexoligomer/polymer wires on electrodes and analysis of their electron conduction mechanism andkinetics, 2) coordination creation nanosheets (CONASHs),3) synthesis of p-conjugated redox metal complex oligomars,polymars and clusters and analysis of their electronic properties,4) synthesis of metal complexes responsive to external-stimuli and analysis of their uniqueproperties and functions, 5) metal nanoparticles coordinated with functional molecules,and 6) bio-photosensors using combination of cyanobacterial photosystem I andmolecular wire. These research results indicate that coordination programming is a promisingapproach to construct intelligent hetero-molecular conjugated systems useful for development ofchemical devices。
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引用次数: 0
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Bulletin of Japan Society of Coordination Chemistry
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