Diverse Intermolecular Interactions in Metal−Organic Frameworks Constructed with the New Supramolecular Synthon Agn−L−Agn(n = 4, 5) (H2L = 2,2′-Bis(prop-2-ynyloxy)biphenyl)
摘要:
The three silver(I) coordination polymers [(Ag2L)(AgNO3)(6)(H2O)] (1), [(Ag2L)(0.5)(AgCF3CO2)(4)(H2O)(2)] (2), and [(Ag2L)(AgCF3CO2)(7)(CH3CN)(3)(mu(2)-H2O)] (3) have been constructed from the flexible multifunctional dianionic ligand L (H2L = 2,2'-bis(prop-2-ynyloxy)biphenyl), providing experimental evidence of coexisting uncommon intermolecular interactions (cation-pi and pi-pi in 1; cation-pi and anion-pi in 2; C N center dot center dot center dot pi and C-H center dot center dot center dot pi in 3) that stabilize their framework structures.
this work, we here prepare a newtetranuclear CuI cluster with a precise configuration of Cu4(PPh3)4(bis(prop‐2‐ynyloxy)biphenyl)2. X‐ray single‐crystal diffraction shows that the bi‐alkynyl ligands bind to two Cu atoms via a σ‐bond and to the other two Cu atoms via a π‐bond configuration, presenting a new alkynyl‐Cu motif and a butterfly‐like framework. Cu4(PPh3)4L2 clusters exhibit photoluminescence
在这项工作中,我们在这里准备了一个新的四核Cu I簇,其精确配置为Cu 4(PPh 3)4(bis(prop-2-ynyloxy)biphenyl)2。X射线单晶衍射表明,双炔基配体通过σ键与两个Cu原子结合,并通过π键构型与另外两个Cu原子结合,呈现出新的炔基Cu基序和蝴蝶状框架。Cu 4(PPh 3)4 L 2簇在410和505 nm处显示出光致发光特性。铜4(PPh 3)4 L 2团簇在固定在不同氧化物上后,在炔烃均偶联反应中也表现出良好的性能。铜(I)物种被证明是均偶联反应过程中的催化活性中心。氧化物的基本性质(例如NiO)可以促进偶联催化,并且明显观察到炔反应物的侧基效应。总而言之,这项研究将铜簇的催化应用扩展到碳-碳偶联反应,并为进一步开发铜簇在其他有机转化中的潜在应用提供了线索。
Medium Rings Bearing Bitriazolyls: Easily Accessible Structures with Superior Performance as Cu Catalyst Ligands
of the MRBTs, 3aa, exhibited a turnover number (TON) as high as 55 000 and dramatic accelerating effects (kobs = 1.95 M–1 s–1) and ranked among the most efficient ligands for copper-catalyzedalkyne and azide cycloaddition. Unlike the difficult access to other known medium rings, these 7–12-membered MRBTs can be prepared in straightforward, one-step manner from structurally diverse linear terminal diynes
得益于其独特的性能,结构新颖且易于使用的中环的开发在制药业和学术研究中引起了极大的兴趣。然而,由于其刚性的骨架和大角度的应变,很难接近中环支架。在本文中,设计,合成了一种新型的带有双氮唑基(MRBT)的中环,被鉴定为铜(I)催化的点击反应的一种有希望的新骨架配体,并用于蛋白质的位点修饰。一种MRBT,3aa,具有高达55,000的周转率(TON),并具有显着的加速作用(k obs = 1.95 M –1 s –1),并且在铜催化的炔烃和叠氮化物环加成反应中位居最有效的配体之列。与难以接近其他已知的中环不同,这些7-12元MRBT可以用结构简单的线性末端二炔和叠氮化物以直接,一步一步的方式制备。因此,独特的可访问性和引人入胜的特性暗示了它们广阔的应用前景。
The oxidation reactions of aromatic 3,3-sigmatropic systems have been investigated under different conditions viz., (a) anodicoxidation in amphipr
已经研究了在不同条件下芳香族3,3-σ系的氧化反应。,(a)两栖动物中的阳极氧化
Diverse Intermolecular Interactions in Metal−Organic Frameworks Constructed with the New Supramolecular Synthon Ag<sub><i>n</i></sub>−L−Ag<sub><i>n</i></sub>(<i>n</i> = 4, 5) (H<sub>2</sub>L = 2,2′-Bis(prop-2-ynyloxy)biphenyl)
作者:Shuang-Quan Zang、Liang Zhao、Thomas C. W. Mak
DOI:10.1021/om800165x
日期:2008.6.9
The three silver(I) coordination polymers [(Ag2L)(AgNO3)(6)(H2O)] (1), [(Ag2L)(0.5)(AgCF3CO2)(4)(H2O)(2)] (2), and [(Ag2L)(AgCF3CO2)(7)(CH3CN)(3)(mu(2)-H2O)] (3) have been constructed from the flexible multifunctional dianionic ligand L (H2L = 2,2'-bis(prop-2-ynyloxy)biphenyl), providing experimental evidence of coexisting uncommon intermolecular interactions (cation-pi and pi-pi in 1; cation-pi and anion-pi in 2; C N center dot center dot center dot pi and C-H center dot center dot center dot pi in 3) that stabilize their framework structures.