杂铜(I)-膦配合物由于结构多样,具有光物理和催化特性而备受关注。在这项工作中,使用设计的联吡啶(L1-L4)和双齿多膦(L5-L8)作为功能性配体,定量合成了一系列杂二亚胺-二膦铜(I)复合物(C1-C10)。这些混合的配体-铜(I)配合物已通过1 H和13 C NMR光谱,电喷雾电离质谱(ESI-MS)和元素分析得到了充分表征。配合物C1,C2的详细结构,C5,C6,C9和C10被单晶X射线衍射分析证实。此外,这些磷化氢– Cu(I)络合物在固态或溶液中在紫外光激发下均表现出强烈的发射。发射复合物C1-C4以猝灭方式(关断)显示出对银离子的高灵敏度发光感测。此外,所有磷化氢保护的铜(I)配合物对水中的叠氮化物-炔烃环加成(CuAAC)都表现出高催化活性。
杂铜(I)-膦配合物由于结构多样,具有光物理和催化特性而备受关注。在这项工作中,使用设计的联吡啶(L1-L4)和双齿多膦(L5-L8)作为功能性配体,定量合成了一系列杂二亚胺-二膦铜(I)复合物(C1-C10)。这些混合的配体-铜(I)配合物已通过1 H和13 C NMR光谱,电喷雾电离质谱(ESI-MS)和元素分析得到了充分表征。配合物C1,C2的详细结构,C5,C6,C9和C10被单晶X射线衍射分析证实。此外,这些磷化氢– Cu(I)络合物在固态或溶液中在紫外光激发下均表现出强烈的发射。发射复合物C1-C4以猝灭方式(关断)显示出对银离子的高灵敏度发光感测。此外,所有磷化氢保护的铜(I)配合物对水中的叠氮化物-炔烃环加成(CuAAC)都表现出高催化活性。
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Tricarbonyl Complexes as Coordinate Covalent Inhibitors for the SARS‐CoV‐2 Main Cysteine Protease
作者:Johannes Karges、Mark Kalaj、Milan Gembicky、Seth M. Cohen
DOI:10.1002/anie.202016768
日期:2021.5.3
syndrome—coronavirus 2 (SARS‐CoV‐2) has impacted the quality of life and cost hundreds‐of‐thousands of lives worldwide. Based on its global spread and mortality, there is an urgent need for novel treatments which can combat this disease. To date, the 3‐chymotrypsin‐like protease (3CLpro), which is also known as the mainprotease, is considered among the most important pharmacological targets. The vast majority
自爆发以来,严重急性呼吸系统综合症冠状病毒 2 (SARS-CoV-2) 影响了生活质量,并导致全世界数十万人丧生。鉴于其在全球的传播和死亡率,迫切需要能够对抗这种疾病的新疗法。迄今为止,3-胰凝乳蛋白酶样蛋白酶(3CL pro )也被称为主要蛋白酶,被认为是最重要的药理学靶点之一。绝大多数研究的 3CL前体抑制剂都是有机非共价结合剂。在此,建议使用无机配位共价结合剂来减弱蛋白酶的活性。 Re 三羰基复合物被鉴定为 3CL pro的协调共价酶抑制。初步研究表明 3CL pro对几种人类蛋白酶具有选择性抑制作用。这项研究首次展示了金属配合物作为 3CL半胱氨酸蛋白酶抑制剂的例子。
Novel Seco Cyclopropa[<i>c</i>]pyrrolo[3,2-<i>e</i>]indole Bisalkylators Bearing a 3,3‘-Arylenebisacryloyl Group as a Linker
We synthesized the novel seco cyclopropa[c]pyrrolo[3,2-e]indole (CPI) bisalkylators and evaluated their antitumor activity. Among these derivatives, 11a (AT-760), in which the two seco 3-methoxycarbonyl-2-trifluoromethyl CPI (MCTFCPI) moieties are connected with a 3,3'-(1,4-phenylene)bisacryloyl group, was found to exhibit more potent cytotoxicity and antitumor activity against HeLaS3 human uterine
Electronically Neutral Metal Complexes As Biological Labels
申请人:RUBIPY SCIENTIFIC, INC.
公开号:US20160146826A1
公开(公告)日:2016-05-26
The invention relates to electronically neutral metal complexes as luminescent labels. The positive charge of the metal ion in the complex is neutralized by the negatively charged groups that are covalently linked to the nitrogen-containing diimine ligands, such as 2,2-bipyridine, 1,10-phenanthroline and their derivatives. The electronic neutrality reduces the impact of the metal complexes on the biological and/or biochemical activities of the labeled biomolecules, while the intensity of luminescent emission under electrochemical excitation is enhanced. These luminescent metal complex labels are useful in bioanalytic methodology development, with luminescence as the signal modality, such as electrochemiluminescence.
Described herin are molecules for use in organic light emitting diodes. Example molecules comprise at least one acceptor moiety A, at least one donor moiety D, and optionally one or more bridge moieties B. Each moiety A is covalently attached to either the moiety B or the moeity D, each moiety D is covalently attached to either the moeity B or the moeity A, and each B is covalently attached to at least one moiety A and at least one moiety D. Values and preferred values of moieties A, D and B are defined herein.
Positional Effects of Hydroxy Groups on Catalytic Activity of Proton-Responsive Half-Sandwich Cp*Iridium(III) Complexes
作者:Yuki Suna、Mehmed Z. Ertem、Wan-Hui Wang、Hide Kambayashi、Yuichi Manaka、James T. Muckerman、Etsuko Fujita、Yuichiro Himeda
DOI:10.1021/om500832d
日期:2014.11.24
carbon dioxide (pH 8.5), dehydrogenation of formic acid (pH 1.8), and transfer hydrogenation reactions using formic acid/formate as a hydrogen source (pH 2.6 and 7.2) were investigated to compare the positional effects of the hydroxy groups. The 4- and 6DHBP complexes exhibited remarkably enhanced catalytic activities under basic conditions because of the resonance effect of the strong electron-donating
质子响应半三明治Cp * Ir(III)配合物,具有在3,3'-,4,4'-,5,5'-或6,6'-位置带有两个羟基的联吡啶配体(3DHBP,4DHBP,5DHBP或6DHBP)进行了系统的研究。UV-vis滴定数据提供了配体上羟基的平均p K a值。发现两种羟基在pH值4.6-5.6的范围为去质子4 - 6DHBP络合物。3DHBP配合物的一个羟基显示出较低的p K a因为去质子化是通过将所生成的含氧阴离子和剩余的羟基,之间形成的强的分子内氢键促进了<0.4的值,其又导致升高的p ķ一个的~13.6用于第二去质子化步骤的值。所述的晶体结构4 -和6DHBP从碱性水溶液得到的复合物显示其去质子化的形式。3DHBP中的分子内氢键在晶体结构中也观察到复合物。这些配合物在适当的pH值下的水相反应中的催化活性,用于二氧化碳的氢化(pH 8.5),甲酸的脱氢(pH 1.8)以及使用甲酸/甲酸酯作为氢源(pH