Efficient energy transfer between coronene-modified permethyl-β-cyclodextrins and porphyrin for light induced DNA cleavage
作者:Jie Yu、Ying-Ming Zhang、Pei-Yu Li、Yu Liu
DOI:10.1039/c7cc00736a
日期:——
hexa-cata-hexabenzocoronene modified permethyl-[small beta]-cyclodextrins with tetrasodium tetraphenylporphyrintetrasulfonate in water, exhibiting highly efficient excited energy transfer behaviors and promising DNA photocleavage...
covalent self-assembly strategy. The triptyceno subunits form a nanosized nest on one side of the aromatic plane with space-matching fullerenes such as C60 and C70 to afford shape-complementary supramolecular complexes. The formation of the complexes in solution was confirmed by 1H NMR and fluorescence titration. Four complexes with C60 or C70 were obtained and studied by single-crystal X-ray diffraction
使用共价自组装策略合成了“ Janus”型六催化-六苯并二氢呋喃,其中三个三烯丙基亚单位对称地融合在二苯并呋喃的外围。三萜烯亚基与空间匹配的富勒烯(例如C 60和C 70)在芳族平面的一侧形成纳米级的巢状结构,以提供形状互补的超分子复合物。通过1 H NMR和荧光滴定确认了溶液中络合物的形成。具有C 60或C 70的四个配合物获得并通过单晶X射线衍射分析进行研究。在晶体结构中,主体显示出适当的可调谐性,以根据客体的形状调节其构象。配合物的不同化学计量比和各种堆积模式表明,这种非平面的多芳族主体与富勒烯配合时具有多样性。
Facile Bottom-Up Synthesis of Coronene-based 3-Fold Symmetrical and Highly Substituted Nanographenes from Simple Aromatics
A facile and efficient self-sorting assemble (CSA) strategy has been paved for bottom-up construction of the 3-fold symmetrical and highly substituted hexa-cata-hexabenzocoronenes (c-HBCs), the trithieno analogues, and larger disc-shaped PAHs from simple chemicals using benzylic carbons as tenon joints and a novel FeCl3-mediated AAA process as a key step. The structures of the as-prepared c-HBCs and related NGs were clearly identified by spectral analyses and X-ray crystallographic studies. Moreover, these can be envisaged to serve as new launching platforms for the construction of larger and more complex g-conjugated molecules and supramolecular architectures because of the modifiable and symmetrical decorations.
Supramolecular Assembly of Coronene Derivatives for Drug Delivery
作者:Jie Yu、Yong Chen、Yu-Hui Zhang、Xun Xu、Yu Liu
DOI:10.1021/acs.orglett.6b02183
日期:2016.9.16
Possessing a small size and C-3-symmetrical rigid backbone, a coronene derivative was synthesized from beta-cyclodextrins and hexa-cata-hexabenzocoronene, and then a water-soluble and biocompatible nanographene/polysaccharide supramolecular assembly was successfully fabricated through noncovalent interactions between adamantly grafted hyaluronic acids and beta-cyclodextrin-modified hexa-cata-hexabenzocoronene. Moreover, the ternary supramolecular assembly showed not only a fluorescence imaging ability toward cancer cells but also good anticancer activity and low toxicity.
Tuning the size of supramolecular M4L4 tetrahedra by ligand connectivity
Triangular triscatechol ligands are prepared in facile reaction sequences. The catechol units are either bound to the triangular backbone through their 3- or 4-position. With titanium(IV) ions, the ligands form metallosupramolecular M4L4tetrahedra which are characterized by ESI MS and proton NMR. Quantum-chemical calculations reveal that connectivity at the catechol in the 3-position results in highly
三角三儿茶酚配体以容易的反应顺序制备。邻苯二酚单元通过其3或4位与三角骨架相连。与钛(IV)离子一起,配体形成金属超分子的M 4 L 4四面体,其特征在于ESI MS和质子NMR。量子化学计算表明,在3位邻苯二酚处的连接性导致高度缩合的结构,而在4位邻苯二酚的连接提供了提供巨大内部空腔的容器分子。