Tunable construction of transition metal-coordinated helicene cages

来源 :中国化学快报(英文版) | 被引量 : 0次 | 上传用户:hj11254
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
We report a facile and tailored method to prepare globally twisted chiral molecular cages through tun-able coordination of bis-bipyridine-terminated helicene ligands to a series of transition metals including Fe(II), Co(II), Ni(II) and Zn(II). This system shows an efficient remote transfer of stereogenecity from the helicene core to the bipyridine-metal coordination sites and subsequently the entire cages. While the Fe(II), Co(II) and Ni(II)-derived M2L3 (M for metal and L for ligand) cages exhibit quasi-reversible redox features, the Zn(II) analogues reveal prominent yellow circularly polarized luminescence. Interestingly, with the addition of Na2SO4, the Zn2L3 cages reassemble into sextuple-stranded Zn6L6(SO4)4 cages in which three Zn2L2 units are bound together by four sulfates and further coalesced by offset inter-ligandπ -π interactions.
其他文献
Glutathione (GSH) plays a critical role in maintaining cellular redox homeostasis in biological system.Mitochondrion is a pivotal organelle for cellular aerobic respiration and its disorder is associated with impaired redox balance, leading to cell death.
Carbon dots (CDs) are novel fluorescent nanomaterials with good water solubility, high resistance to pho-tobleaching and low toxicity. While, there are few studies elaborate on the relationship among reaction conditions, properties and applications of CDs
A variety of nano-engineered photosensitizers have been developed for photodynamic therapy (PDT) of cancer diseases. However, traditional nano-engineering methods usually cannot avoid drug leak-age and premature release, and have disadvantages such as low
Chemiluminescence (CL) has been widely used for bioanalysis owing to its high sensitivity, low back-ground and simplicity. However, most of the CL systems need acidic/alkaline conditions or organic sol-vent to enhance their luminescent efficiency, and the
Evaluating the correlation between hypoxia inducible factor 1 (HIF-1) and nitric oxide (NO) generated under hypoxia is of great significance. In this work, we developed a fluorescent probe for the monitor of HIF-1 activity influenced by NO under hypoxia i
Palladium-catalyzed oxidative formal [4 + 1] annulation of pyridine-substituted acrylonitriles toward di-vergent fused N-heterocycles synthesis is reported. The heterodifunctionalization reaction with Cu(OAc)2 and urea as the nitrogen source accesses to n
Oncolytic virus is an emerging anti-cancer strategy. However, extracellular matrix (ECM), as a physical barrier, limits virus spread within the tumor. To overcome the obstacle, we constructed a recombinant Newcastle disease virus (NDV) expressing matrix m
Photodynamic therapy (PDT) has emerged as a potential clinical strategy for tumor therapy. It can gener-ate reactive oxygen species (ROS) to cause the chemical damage of tumor cells and promote the immune killing effects of T cells on tumor cells in the p
Based on a recent report concerning endogenous agents (i.e., pyridoxal phosphate, adenosine triphosphate, adenosine monophosphate, folinic acid) that modulate the oligomerization of apopto-sis-associated speck-like protein (ASC) via the peptide epitope of
The development of ultra-sensitive methods for detecting anions is limited by their low charge to radius ratios, microenvironment sensitivity, and pH sensitivity. In this paper, a magnetic sensor is devised that exploits the controllable and selective coo